This page has only limited features, please log in for full access.

Dr. Stepan Bazhenov
A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow 119991, Russia

Basic Info

Basic Info is private.

Research Keywords & Expertise

0 Gas Separation
0 Carbon Capture and Storage
0 hollow fiber membranes
0 electromembrane processes
0 Membrane materials

Fingerprints

hollow fiber membranes
Gas-liquid membrane contactors
Gas Separation
Carbon Capture and Storage

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 14 December 2020 in Membranes
Reads 0
Downloads 0

The mitigation of the physical aging of thin-film composite (TFC) poly[1-trimethylsilyl-1-propyne] (PTMSP) membranes was studied via the simultaneous application of a polymer-selective layer crosslinking and mixed-matrix membrane approach. For the first time, a recently developed highly porous activated carbon material (infrared (IR) pyrolyzed poly[acrylonitrile] (PAN) or IR-PAN-a) was investigated as an additive to a PTMSP-selective layer for the reduction of aging in TFC membranes. The total electric energy spent on the IR irradiation treatment of IR-PAN-a particles was twice lower than conventional heating. The flat-sheet porous microfiltration membrane MFFK-1 was used as a support, and the crosslinked PTMSP/PEI loaded with a porous filler was applied as a selective layer (0.8–1.8 µm thick) to the TFC membranes. The initial IR-PAN-a sample was additionally milled to obtain a milled IR-PAN-aM sample with a monomodal particle size distribution of 500–800 nm. It was shown that IR-PAN-a, as a filler material with a high surface area and pore volume (2450 m2/g and 1.06 cm3/g, respectively) and a well-developed sponge-like structure, leads to the increase of the N2, O2, and CO2 permeance of PTMSP-based hybrid membrane material and the decrease of the aging of PTMSP. The simultaneous effect of crosslinking and the addition of a highly porous filler essentially improved the aging behavior of PTMSP-based TFC membranes. The monomodal and narrow particle size distribution of highly porous activated IR-pyrolyzed PAN is a key factor for the production of TFC membranes with reduced aging. The highest stability was achieved by the addition of a milled IR-PAN-aM sample (10 wt%). TFC membrane permeance was 6300 GPU (30% of initial permeance) after 11,000 h of aging at ambient laboratory conditions.

ACS Style

Danila Bakhtin; Stepan Bazhenov; Victoria Polevaya; Evgenia Grushevenko; Sergey Makaev; Galina Karpacheva; Vladimir Volkov; Alexey Volkov. Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile. Membranes 2020, 10, 419 .

AMA Style

Danila Bakhtin, Stepan Bazhenov, Victoria Polevaya, Evgenia Grushevenko, Sergey Makaev, Galina Karpacheva, Vladimir Volkov, Alexey Volkov. Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile. Membranes. 2020; 10 (12):419.

Chicago/Turabian Style

Danila Bakhtin; Stepan Bazhenov; Victoria Polevaya; Evgenia Grushevenko; Sergey Makaev; Galina Karpacheva; Vladimir Volkov; Alexey Volkov. 2020. "Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile." Membranes 10, no. 12: 419.

Conference paper
Published: 06 December 2020 in Journal of Physics: Conference Series
Reads 0
Downloads 0

The insoluble polyimides are the most promising group of polymer materials for fabrication of solvent stable filtration membranes suitable for operation at elevated temperatures. In order to synthesize asymmetric membranes from insoluble polyimide, it is proposed to fabricate the membranes from a pre-polymer solution (polyamide acid – PAA) by non-solvent induced phase separation method followed by imidization to form non-soluble porous polyimide membrane. The thermoplastic crystallizable polyimide R-BAPB, which is resistant to a number of known organic solvents, was chosen as a membrane material. For the first time, hollow fiber membranes based on imidized PAA (R-BAPB) with a controlled distribution of pores on the inner side of the hollow fiber were formed. It has been established that the use of "hard" non-solvents, such as water or aqueous-organic solutions, is preferable for the formation of a porous structure in the membranes based on PAA (R-BAPB). Synthesized PAA membranes were used to prepare porous membranes based on the thermoplastic polyimide R-BAPB by thermal imidization. Imidization process was confirmed by an increase in the glass transition temperature of the material to 220 °C (corresponds to the glass transition temperature of polyimide (R-BAPB)) and is accompanied by a significant increase in its elastic modulus. The results of the measurements of the transport properties of polyimide membranes for gases and liquids indicate that microfiltration transport pores are present in the membranes.

ACS Style

I L Borisov; S D Bazhenov; V P Vasilevsky; D S Bakhtin; A V Balynin; A A Yushkin; G V Vaganov; A L Didenko; V E Yudin; A V Volkov. Asymmetric hollow-fiber filtration membranes based on insoluble polyimide (R-BAPB): Influence of coagulation bath on porous structure. Journal of Physics: Conference Series 2020, 1696, 012040 .

AMA Style

I L Borisov, S D Bazhenov, V P Vasilevsky, D S Bakhtin, A V Balynin, A A Yushkin, G V Vaganov, A L Didenko, V E Yudin, A V Volkov. Asymmetric hollow-fiber filtration membranes based on insoluble polyimide (R-BAPB): Influence of coagulation bath on porous structure. Journal of Physics: Conference Series. 2020; 1696 (1):012040.

Chicago/Turabian Style

I L Borisov; S D Bazhenov; V P Vasilevsky; D S Bakhtin; A V Balynin; A A Yushkin; G V Vaganov; A L Didenko; V E Yudin; A V Volkov. 2020. "Asymmetric hollow-fiber filtration membranes based on insoluble polyimide (R-BAPB): Influence of coagulation bath on porous structure." Journal of Physics: Conference Series 1696, no. 1: 012040.

Journal article
Published: 09 March 2020 in Separation and Purification Technology
Reads 0
Downloads 0

A multi-parametric simulation of the 2-D steady transverse flow of viscous incompressible fluid and diffusion transport of a dissolved solute past a model fibrous medium – a row of parallel sorbent fibers or hollow-fiber membranes is performed in a wide range of Schmidt (Sc) and Peclet (Pe) numbers for fiber Reynolds numbers up to Re = 100. The Navier-Stokes and convection-diffusion equations are solved numerically and the fiber capture efficiency for solute molecules is calculated as a function of Re, Sc and inter-fiber distance. The field of solute concentration and the fiber capture efficiency are found with zero concentration-fixed and diffusion flux boundary conditions set at the streamlined fiber surface, and the difference between the results of simulations with the two boundary conditions is shown for high Peclet numbers. It is also shown that the fiber capture efficiencies estimated with both boundary conditions tend to a constant maximum value for low Peclet numbers. The results of simulations for the fiber capture efficiency are validated by comparison with existing analytical asymptotic solutions for low and high Peclet numbers, and the agreement is shown.

ACS Style

V.A. Kirsch; S.D. Bazhenov. Numerical simulation of solute removal from a cross-flow past a row of parallel hollow-fiber membranes. Separation and Purification Technology 2020, 242, 116834 .

AMA Style

V.A. Kirsch, S.D. Bazhenov. Numerical simulation of solute removal from a cross-flow past a row of parallel hollow-fiber membranes. Separation and Purification Technology. 2020; 242 ():116834.

Chicago/Turabian Style

V.A. Kirsch; S.D. Bazhenov. 2020. "Numerical simulation of solute removal from a cross-flow past a row of parallel hollow-fiber membranes." Separation and Purification Technology 242, no. : 116834.

Journal article
Published: 13 November 2019 in Membranes
Reads 0
Downloads 0

Heat stable salts (HSS) formed and continuously accumulated in the amine-based solvents due to solvent degradation and impurities in the feed gas can dramatically change the efficiency of the amine scrubbing process. HSS can be removed by using different methods including membrane separation such as electrodialysis (ED). In this work, we studied the effect of CO2 loading of the lean 30 wt % monoethanolamine (MEA) solution on the efficiency of HSS removal and MEA loss. In the model MEA solution containing HSS on the level of 48 meq/L, the carbon dioxide concentration was varied from 0.2 down to 0 mole (CO2)/mole (MEA). The reclaiming of model MEA solution was carried out by lab-scale two-stage ED unit when the concentrate stream after the first stage was additionally treated using ED (second stage) that allowed reducing MEA loss. It was shown that the decrease of carbon dioxide content from 0.2 down to 0 mole (CO2)/mole (MEA) resulted in a substantial reduction of both parameters—the MEA loss and the specific power consumption with respect to extracted HSS (from 140 down 37 kJ per 1 g of recovered HSS anions). This can be explained by the drop in the total concentration of ions formed by the interaction of MEA solution with carbon dioxide. However, the change of CO2 loading is associated with additional power consumption towards further solvent regeneration in the column. Based on the preliminary estimations of power consumption required for additional CO2 stripping with the respect to the power consumption of ED stage, it seems that lean solvent CO2 loading of 0.1 mole/mole provides an optimum for the power input at 25.9 MJ/kg(solvent).

ACS Style

Evgeniia Grushevenko; Stepan Bazhenov; Vladimir Vasilevsky; Eduard Novitsky; Maxim Shalygin; Alexey Volkov. Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis. Membranes 2019, 9, 152 .

AMA Style

Evgeniia Grushevenko, Stepan Bazhenov, Vladimir Vasilevsky, Eduard Novitsky, Maxim Shalygin, Alexey Volkov. Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis. Membranes. 2019; 9 (11):152.

Chicago/Turabian Style

Evgeniia Grushevenko; Stepan Bazhenov; Vladimir Vasilevsky; Eduard Novitsky; Maxim Shalygin; Alexey Volkov. 2019. "Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis." Membranes 9, no. 11: 152.

Journal article
Published: 01 August 2019 in Russian Journal of Applied Chemistry
Reads 0
Downloads 0

Absorption using aqueous solutions of alkanolamines is the most widely used procedure for removal of carbon dioxide from natural gas, flue gases from power-generating facilities, and other mixtures. Its main drawback is degradation/deactivation of alkanolamine under the process conditions (high temperatures, presence of oxygen and other impurities) with the formation of heat-stable salts consisting of alkanolammonium cation and anions of organic and inorganic acids. The main operation problems caused by heat-stable salts are considered in the review. Three main methods for removal of heat-stable salts from alkanolamine adsorbents are described in detail: distillation, ion exchange, and electrodialysis. The main characteristics of these methods and their advantages and drawbacks are described, and a comparative analysis is made. The history and state-of-the art of studies within the framework of each method are presented.

ACS Style

S. D. Bazhenov; E. G. Novitskii; V. P. Vasilevskii; Evgenia Grushevenko; A. A. Bienko; A. V. Volkov. Heat-Stable Salts and Methods for Their Removal from Alkanolamine Carbon Dioxide Absorbents (Review). Russian Journal of Applied Chemistry 2019, 92, 1045 -1063.

AMA Style

S. D. Bazhenov, E. G. Novitskii, V. P. Vasilevskii, Evgenia Grushevenko, A. A. Bienko, A. V. Volkov. Heat-Stable Salts and Methods for Their Removal from Alkanolamine Carbon Dioxide Absorbents (Review). Russian Journal of Applied Chemistry. 2019; 92 (8):1045-1063.

Chicago/Turabian Style

S. D. Bazhenov; E. G. Novitskii; V. P. Vasilevskii; Evgenia Grushevenko; A. A. Bienko; A. V. Volkov. 2019. "Heat-Stable Salts and Methods for Their Removal from Alkanolamine Carbon Dioxide Absorbents (Review)." Russian Journal of Applied Chemistry 92, no. 8: 1045-1063.

Journal article
Published: 28 February 2019 in Separation and Purification Technology
Reads 0
Downloads 0

The novel highly permeable composite membranes with a thin selective layer made of poly(1-trimethylsilyl-1-propyne) (PTMSP) on polysulfone hollow fiber support were proposed for application in gas-liquid membrane contactor for ethylene/ethane separation. The effects of AgNO3 concentration in aqueous absorbent and its velocity on the ethylene mass transfer coefficient were evaluated. High ethylene permeance (83 GPU) at ethylene recovery of 44% was achieved. Six months of membrane contactor operation revealed only 24% drop in the overall mass transfer coefficient. The contributions of membrane and liquid phase to the overall mass transfer resistance were estimated. The contributions were found to be comparable values.

ACS Style

A.O. Malakhov; S.D. Bazhenov; V.P. Vasilevsky; I.L. Borisov; A.A. Ovcharova; A.V. Bildyukevich; Vladimir Volkov; Lidietta Giorno. Thin-film composite hollow fiber membranes for ethylene/ethane separation in gas-liquid membrane contactor. Separation and Purification Technology 2019, 219, 64 -73.

AMA Style

A.O. Malakhov, S.D. Bazhenov, V.P. Vasilevsky, I.L. Borisov, A.A. Ovcharova, A.V. Bildyukevich, Vladimir Volkov, Lidietta Giorno. Thin-film composite hollow fiber membranes for ethylene/ethane separation in gas-liquid membrane contactor. Separation and Purification Technology. 2019; 219 ():64-73.

Chicago/Turabian Style

A.O. Malakhov; S.D. Bazhenov; V.P. Vasilevsky; I.L. Borisov; A.A. Ovcharova; A.V. Bildyukevich; Vladimir Volkov; Lidietta Giorno. 2019. "Thin-film composite hollow fiber membranes for ethylene/ethane separation in gas-liquid membrane contactor." Separation and Purification Technology 219, no. : 64-73.

Journal article
Published: 04 January 2019 in Fibers
Reads 0
Downloads 0

Olefin/paraffin separation is an important technological process. A promising alternative to conventional energy-consuming methods is employment of gas-liquid membrane contactors. In the present work, the membranes used were polysulfone (PSf) asymmetrical porous hollow fibers fabricated via the NIPS (non-solvent induced phase separation) technique in the free spinning mode. The surface of the fine-pored selective layer from the lumen side of the fibers was modified by layer-by-layer deposition of perfluorinated acrylic copolymer Protect Guard® in order to hydrophobized the surface and to avoid penetration of the liquid absorbent in the porous structure of the membranes. The absorbents studied were silver salts (AgNO3 and AgBF4) solutions in five ionic liquids (ILs) based on imidazolium and phosphonium cations. The membranes were analyzed through gas permeance measurement, SEM and dispersive X-ray (EDXS). Contact angle values of both unmodified and modified membranes were determined for water, ethylene glycol, ILs and silver salts solutions in ILs. It was shown that the preferable properties for employment in membrane contactor refer to the PSf hollow fiber membranes modified by two layers of Protect Guard®, and to the absorbent based on 1 M AgNO3 solution in 1-ethyl-3-methylimidazolium dicyanamide. Using the membrane contactor designed, ethylene/ethane mixture (80/20) separation was carried out. The fluxes of both components as well as their overall mass transport coefficients (MTC) were calculated. It was shown that the membrane absorption system developed provides absorption of approx. 37% of the initial ethylene volume in the mixture. The overall MTC value for ethylene was 4.7 GPU (gas permeance unit).

ACS Style

Margarita Kostyanaya; Stepan Bazhenov; Ilya Borisov; Tatiana Plisko; Vladimir Vasilevsky. Surface Modified Polysulfone Hollow Fiber Membranes for Ethane/Ethylene Separation Using Gas-Liquid Membrane Contactors with Ionic Liquid-Based Absorbent. Fibers 2019, 7, 4 .

AMA Style

Margarita Kostyanaya, Stepan Bazhenov, Ilya Borisov, Tatiana Plisko, Vladimir Vasilevsky. Surface Modified Polysulfone Hollow Fiber Membranes for Ethane/Ethylene Separation Using Gas-Liquid Membrane Contactors with Ionic Liquid-Based Absorbent. Fibers. 2019; 7 (1):4.

Chicago/Turabian Style

Margarita Kostyanaya; Stepan Bazhenov; Ilya Borisov; Tatiana Plisko; Vladimir Vasilevsky. 2019. "Surface Modified Polysulfone Hollow Fiber Membranes for Ethane/Ethylene Separation Using Gas-Liquid Membrane Contactors with Ionic Liquid-Based Absorbent." Fibers 7, no. 1: 4.

Journal article
Published: 25 November 2018 in Fibers
Reads 0
Downloads 0

A numerical simulation of the laminar flow field and convection–diffusion mass transfer in a regular system of parallel fully absorbing fibers for the range of Reynolds numbers up to Re = 300 is performed. An isolated row of equidistant circular fibers arranged normally to the external flow is considered as the simplest model for a hollow-fiber membrane contactor. The drag forces acting on the fibers with dependence on Re and on the ratio of the fiber diameter to the distance between the fiber axes, as well as the fiber Sherwood number versus Re and the Schmidt number, Sc, are calculated. A nonlinear regression formula is proposed for calculating the fiber drag force versus Re in a wide range of the interfiber distances. It is shown that the Natanson formula for the fiber Sherwood number as a function of the fiber drag force, Re, and Sc, which was originally derived in the limit of high Peclet numbers, is applicable for small and intermediate Reynolds numbers; intermediate and large Peclet numbers, where Pe = Re × Sc; and for sparse and moderately dense rows of fibers.

ACS Style

Vasily A. Kirsch; Alexandr V. Bildyukevich; Stepan D. Bazhenov. Simulation of Convection–Diffusion Transport in a Laminar Flow past a Row of Parallel Absorbing Fibers. Fibers 2018, 6, 90 .

AMA Style

Vasily A. Kirsch, Alexandr V. Bildyukevich, Stepan D. Bazhenov. Simulation of Convection–Diffusion Transport in a Laminar Flow past a Row of Parallel Absorbing Fibers. Fibers. 2018; 6 (4):90.

Chicago/Turabian Style

Vasily A. Kirsch; Alexandr V. Bildyukevich; Stepan D. Bazhenov. 2018. "Simulation of Convection–Diffusion Transport in a Laminar Flow past a Row of Parallel Absorbing Fibers." Fibers 6, no. 4: 90.

Review
Published: 10 October 2018 in Fibers
Reads 0
Downloads 0

Gas-liquid membrane contactors that were based on hollow fiber membranes are the example of highly effective hybrid separation processes in the field of membrane technology. Membranes provide a fixed and well-determined interface for gas/liquid mass transfer without dispensing one phase into another while their structure (hollow fiber) offers very large surface area per apparatus volume resulted in the compactness and modularity of separation equipment. In many cases, stated benefits are complemented with high separation selectivity typical for absorption technology. Since hollow fiber membrane contactors are agreed to be one of the most perspective methods for CO2 capture technologies, the major reviews are devoted to research activities within this field. This review is focused on the research works carried out so far on the applications of membrane contactors for other gas-liquid separation tasks, such as water deoxygenation/ozonation, air humidity control, ethylene/ethane separation, etc. A wide range of materials, membranes, and liquid solvents for membrane contactor processes are considered. Special attention is given to current studies on the capture of acid gases (H2S, SO2) from different mixtures. The examples of pilot-scale and semi-industrial implementation of membrane contactors are given.

ACS Style

Stepan D. Bazhenov; Alexandr V. Bildyukevich; Alexey V. Volkov. Gas-Liquid Hollow Fiber Membrane Contactors for Different Applications. Fibers 2018, 6, 76 .

AMA Style

Stepan D. Bazhenov, Alexandr V. Bildyukevich, Alexey V. Volkov. Gas-Liquid Hollow Fiber Membrane Contactors for Different Applications. Fibers. 2018; 6 (4):76.

Chicago/Turabian Style

Stepan D. Bazhenov; Alexandr V. Bildyukevich; Alexey V. Volkov. 2018. "Gas-Liquid Hollow Fiber Membrane Contactors for Different Applications." Fibers 6, no. 4: 76.

Journal article
Published: 01 April 2018 in International Journal of Greenhouse Gas Control
Reads 0
Downloads 0

In this study, the gas-liquid membrane contactor was considered for regeneration of the room-temperature ionic liquids (RTIL) that can be used as physical solvents for carbon dioxide capture process at elevated pressures. Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) was selected as a membrane material due to its high mass transport characteristics and good mechanical properties. Nine different RTILs, such as [Emim][DCA], [Emim][BF4], [Emim][DEP], [Bmim][BF4], [Bmim][Tf2N], [Hmim][TCB], [P66614][DCA], [P66614][Br] and [P66614][Phos], were used to evaluate the solvent-membrane compatibility. The long-term sorption tests (40+ days) revealed that the solvent-membrane interaction is mainly determined by the liquid surface tension regardless of viscosity and molecular size of RTILs. For instance, [Emim][BF4] and [Emim][DCA], having the surface tension of 60.3 and 54.0 mN/m, demonstrated a very low affinity to the bulk material of PTMSP (sorption as low as 0.02 g/g; no swelling); while for the next ionic liquid [Bmim][BF4] with surface tension of 44.4 mN/m, the sorption and swelling of PTMSP was 0.79 g/g and 21%, respectively. The long-term RTIL permeation test (Δp = 40 bar, T = 50°С, t > 400 h) confirmed that there is no hydrodynamic flow through PTMSP for [Emim][DCA] and [Emim][BF4]. The concept of CO2 stripping from RTIL with the membrane contactor by the pressure (Δp = 10 bar) and temperature (ΔT = 20 °С) swing was proved by using dense PTMSP membrane and [Emim][BF4]. The overall mass transfer coefficient value was equal to (1.6 − 3.8) × 10−3 cm/s with respect to liquid flow rate. By using the resistance-in-series model, it was shown that the membrane resistance contribution to the gas transfer was estimated to be approximately 8%.

ACS Style

Stepan Bazhenov; Alexander Malakhov; Danila Bakhtin; Valery Khotimskiy; Galina Bondarenko; Vladimir Volkov; Mahinder Ramdin; Thijs J.H. Vlugt; Alexey Volkov. CO2 stripping from ionic liquid at elevated pressures in gas-liquid membrane contactor. International Journal of Greenhouse Gas Control 2018, 71, 293 -302.

AMA Style

Stepan Bazhenov, Alexander Malakhov, Danila Bakhtin, Valery Khotimskiy, Galina Bondarenko, Vladimir Volkov, Mahinder Ramdin, Thijs J.H. Vlugt, Alexey Volkov. CO2 stripping from ionic liquid at elevated pressures in gas-liquid membrane contactor. International Journal of Greenhouse Gas Control. 2018; 71 ():293-302.

Chicago/Turabian Style

Stepan Bazhenov; Alexander Malakhov; Danila Bakhtin; Valery Khotimskiy; Galina Bondarenko; Vladimir Volkov; Mahinder Ramdin; Thijs J.H. Vlugt; Alexey Volkov. 2018. "CO2 stripping from ionic liquid at elevated pressures in gas-liquid membrane contactor." International Journal of Greenhouse Gas Control 71, no. : 293-302.

Journal article
Published: 01 August 2017 in Separation and Purification Technology
Reads 0
Downloads 0
ACS Style

Anna Ovcharova; Vladimir Vasilevsky; Ilya Borisov; Stepan Bazhenov; Alexey Volkov; Alexandr Bildyukevich; Vladimir Volkov. Polysulfone porous hollow fiber membranes for ethylene-ethane separation in gas-liquid membrane contactor. Separation and Purification Technology 2017, 183, 162 -172.

AMA Style

Anna Ovcharova, Vladimir Vasilevsky, Ilya Borisov, Stepan Bazhenov, Alexey Volkov, Alexandr Bildyukevich, Vladimir Volkov. Polysulfone porous hollow fiber membranes for ethylene-ethane separation in gas-liquid membrane contactor. Separation and Purification Technology. 2017; 183 ():162-172.

Chicago/Turabian Style

Anna Ovcharova; Vladimir Vasilevsky; Ilya Borisov; Stepan Bazhenov; Alexey Volkov; Alexandr Bildyukevich; Vladimir Volkov. 2017. "Polysulfone porous hollow fiber membranes for ethylene-ethane separation in gas-liquid membrane contactor." Separation and Purification Technology 183, no. : 162-172.

Journal article
Published: 13 February 2017 in Fibers
Reads 0
Downloads 0

For the development of high efficiency porous supports for composite membrane preparation, polysulfone (PSf) hollow fiber membranes (outer diameter 1.57 mm, inner diameter 1.12 mm) were modified by air plasma using the low temperature plasma treatment pilot plant which is easily scalable to industrial level and the Piranha etch (H2O2 + H2SO4). Chemical and plasma modification affected only surface layers and did not cause PSf chemical structure change. The modifications led to surface roughness decrease, which is of great importance for further thin film composite (TFC) membranes fabrication by dense selective layer coating, and also reduced water and ethylene glycol contact angle values for modified hollow fibers surface. Furthermore, the membranes surface energy increased two-fold. The Piranha mixture chemical modification did not change the membranes average pore size and gas permeance values, while air plasma treatment increased pore size 1.5-fold and also 2 order enhanced membranes surface porosity. Since membranes surface porosity increased due to air plasma treatment the modified membranes were used as efficient supports for preparation of high permeance TFC membranes by using poly[1-(trimethylsilyl)-1-propyne] as an example for selective layer fabrication.

ACS Style

Ilya Borisov; Anna Ovcharova; Danila Bakhtin; Stepan Bazhenov; Alexey Volkov; Rustem Ibragimov; Rustem Gallyamov; Galina Bondarenko; Rais Mozhchil; Alexandr Bildyukevich; Vladimir Volkov. Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching. Fibers 2017, 5, 6 .

AMA Style

Ilya Borisov, Anna Ovcharova, Danila Bakhtin, Stepan Bazhenov, Alexey Volkov, Rustem Ibragimov, Rustem Gallyamov, Galina Bondarenko, Rais Mozhchil, Alexandr Bildyukevich, Vladimir Volkov. Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching. Fibers. 2017; 5 (1):6.

Chicago/Turabian Style

Ilya Borisov; Anna Ovcharova; Danila Bakhtin; Stepan Bazhenov; Alexey Volkov; Rustem Ibragimov; Rustem Gallyamov; Galina Bondarenko; Rais Mozhchil; Alexandr Bildyukevich; Vladimir Volkov. 2017. "Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching." Fibers 5, no. 1: 6.

Journal article
Published: 01 October 2016 in Petroleum Chemistry
Reads 0
Downloads 0

Membrane technology is characterized by high efficiency, compatibility and flexibility of various membrane processes in integrated systems, low power consumption, high stability and environmental safety of processes, comparative ease and simplicity of controlling and scaling-up, as well as a unique functional flexibility of the membrane processes. This is why the membrane technology is considered as a promising way to reduce anthropogenic emissions of carbon dioxide into the atmosphere. Gas–liquid membrane contactors are a prime example of high-performance hybrid processes using membrane technologies. Integrating several separation methods in one device (membrane contactor) makes it possible to retain benefits of membrane technology, such as small size and flexibility, complementing them with high separation selectivity typical of CO2 absorption. This review presents the basic principles of operation and design of membrane contactors, and a wide range of materials, membranes, and liquid absorbents for membrane CO2 absorption/stripping are considered. Particular attention has been paid to current studies on CO2 removal from thermal power plant flue gas, natural gas, biogas, and syngas. The examples of pilot-scale and semi-commercial implementation of CO2 absorption/stripping in membrane contactors have been given.

ACS Style

S. D. Bazhenov; E. S. Lyubimova. Gas–liquid membrane contactors for carbon dioxide capture from gaseous streams. Petroleum Chemistry 2016, 56, 889 -914.

AMA Style

S. D. Bazhenov, E. S. Lyubimova. Gas–liquid membrane contactors for carbon dioxide capture from gaseous streams. Petroleum Chemistry. 2016; 56 (10):889-914.

Chicago/Turabian Style

S. D. Bazhenov; E. S. Lyubimova. 2016. "Gas–liquid membrane contactors for carbon dioxide capture from gaseous streams." Petroleum Chemistry 56, no. 10: 889-914.

Journal article
Published: 01 October 2016 in Green Energy & Environment
Reads 0
Downloads 0

In the development of the composite gas separation membranes for post-combustion CO2 capture, little attention is focused on the optimization of the membrane supports, which satisfy the conditions of this technology. The primary requirements to the membrane supports are concerned with their high CO2 permeance. In this work, the membrane supports with desired characteristics were developed as high-permeance gas separation thin film composite (TFC) membranes with the thin defect-free layer from the crosslinked highly permeable polymer, poly[1-(trimethylsilyl)-1-propyne] (PTMSP). This layer is insoluble in chloroform and can be used as a gutter layer for the further deposition of the СО2-selective materials from the organic solvents. Crosslinking of PTMSP was performed using polyethyleneimine (PEI) and poly (ethyleneglycol) diglycidyl ether (PEGDGE) as crosslinking agents. Optimal concentrations of PEI in PTMSP and PEGDGE in methanol were selected in order to diminish the undesirable effect on the final membrane gas transport characteristics. The conditions of the kiss-coating technique for the deposition of the thin defect-free PTMSP-based layer, namely, composition of the casting solution and the speed of movement of the porous commercial microfiltration-grade support, were optimized. The procedure of post-treatment with alcohols and alcohol solutions was shown to be crucial for the improvement of gas permeance of the membranes with the crosslinked PTMSP layer having thickness ranging within 1–2.5 μm. The claimed membranes showed the following characteristics: CO2 permeance is equal to 50–54 m3(STP)/(m2⋅h⋅bar) (18,500–20,000 GPU), ideal CO2/N2 selectivity is 3.6–3.7, and their selective layers are insoluble in chloroform. Thus, the developed high-permeance TFC membranes are considered as a promising supports for further modification by enhanced CO2 selective layer formation.

ACS Style

Stepan D. Bazhenov; Ilya L. Borisov; Danila S. Bakhtin; Anastasia N. Rybakova; Valery S. Khotimskiy; Sergey P. Molchanov; Vladimir V. Volkov. High-permeance crosslinked PTMSP thin-film composite membranes as supports for CO2 selective layer formation. Green Energy & Environment 2016, 1, 235 -245.

AMA Style

Stepan D. Bazhenov, Ilya L. Borisov, Danila S. Bakhtin, Anastasia N. Rybakova, Valery S. Khotimskiy, Sergey P. Molchanov, Vladimir V. Volkov. High-permeance crosslinked PTMSP thin-film composite membranes as supports for CO2 selective layer formation. Green Energy & Environment. 2016; 1 (3):235-245.

Chicago/Turabian Style

Stepan D. Bazhenov; Ilya L. Borisov; Danila S. Bakhtin; Anastasia N. Rybakova; Valery S. Khotimskiy; Sergey P. Molchanov; Vladimir V. Volkov. 2016. "High-permeance crosslinked PTMSP thin-film composite membranes as supports for CO2 selective layer formation." Green Energy & Environment 1, no. 3: 235-245.

Journal article
Published: 01 November 2015 in International Journal of Greenhouse Gas Control
Reads 0
Downloads 0

A study of the behavior of heat stable salts (HSS) during electrodialysis (ED) reclaiming of monoethanolamine solvent (30 wt.% MEA) is reported in detail. Degraded lean MEA samples with a loading of approx. 0.2 mol/mol were taken from the solvent loop of post-combustion capture (PCC) pilot plant after 400, 535 and 972 h of operation at real conditions. The specially designed conventional pilot ED unit equipped with cation-exchanged membranes and anion-exchanged membranes was used. Before and after ED reclaiming, all streams were analyzed for specific solvent components. A quite uniform removal of all analyzed HSS anions (except for nitrate ions) during the ED treatment prevents accumulation of any specific undesirable compound in the solvent loop. Visual inspection of the ion-exchange membranes revealed the deposition on the membrane surface having reddish-brown color. It was experimentally confirmed that such deposition did not noticeable affect on membrane performance in ED process. Furthermore, it was demonstrated on the laboratory level that selected membranes possess a good long-term stability after being contacted with fresh and degraded MEA for approx. 2 years.

ACS Style

Stepan Bazhenov; Alexander Rieder; Bernd Schallert; Vladimir Vasilevsky; Sven Unterberger; Evgenia Grushevenko; Vladimir Volkov; Alexey Volkov. Reclaiming of degraded MEA solutions by electrodialysis: Results of ED pilot campaign at post-combustion CO 2 capture pilot plant. International Journal of Greenhouse Gas Control 2015, 42, 593 -601.

AMA Style

Stepan Bazhenov, Alexander Rieder, Bernd Schallert, Vladimir Vasilevsky, Sven Unterberger, Evgenia Grushevenko, Vladimir Volkov, Alexey Volkov. Reclaiming of degraded MEA solutions by electrodialysis: Results of ED pilot campaign at post-combustion CO 2 capture pilot plant. International Journal of Greenhouse Gas Control. 2015; 42 ():593-601.

Chicago/Turabian Style

Stepan Bazhenov; Alexander Rieder; Bernd Schallert; Vladimir Vasilevsky; Sven Unterberger; Evgenia Grushevenko; Vladimir Volkov; Alexey Volkov. 2015. "Reclaiming of degraded MEA solutions by electrodialysis: Results of ED pilot campaign at post-combustion CO 2 capture pilot plant." International Journal of Greenhouse Gas Control 42, no. : 593-601.

Journal article
Published: 01 December 2014 in Petroleum Chemistry
Reads 0
Downloads 0

The regeneration of a carbon dioxide-loaded aqueous solution of diethanolamine (DEA) in a membrane contactor-stripper at a temperature of 100°C, an absorbent pressure of 10 atm, and a varying absorbent feed flow rate has been studied. The membranes used were laboratory samples of composite membranes prepared by deposition of thin separation layers of poly[1-(trimethylsilyl)-1-propyne] (PTMSP) on a porous support. The support was MFFK-1 microfiltration membrane (Vladipor) with the filtering porous layer of fluoroplastic F-42 (tetrafluoroethylene-vinylidene fluoride copolymer) deposited on a nonwoven polyethylene terephthalate (PET) support. After the first 10 days of testing, the CO2 flux at the membrane contactor outlet was reduced by a factor of 3 and then stabilized at 2 m3/(m2 h) within the next 80 days. It has been found that along with CO2 transport through the membrane, the vapor of the absorbent solution components is transferred. The concentration of DEA in the condensate was 0.5 wt %, that corresponds to the composition of equilibrium vapor over a 30 wt % DEA aqueous solution at 100°C. Since PTMSP is chemically resistant to the DEA solution at the regeneration temperature, the deterioration of the transport properties of the PTMSP/MFFK(PET) composite membrane with time during the absorbent regeneration is associated with the chemical degradation of the nonwoven PET support by the action of penetrating DEA vapor at a temperature of 100°C. It has been concluded that more chemically and thermally resistant porous supports such as ceramic microfiltration membranes should be used.

ACS Style

S. D. Bazhenov; G. A. Dibrov; E. G. Novitsky; V. P. Vasilevsky; V. V. Volkov. Effect of absorbent vapor on stability of characteristics of a composite PTMSP membrane on nonwoven polyester support during regeneration of diethanolamine solution in membrane contactor. Petroleum Chemistry 2014, 54, 617 -621.

AMA Style

S. D. Bazhenov, G. A. Dibrov, E. G. Novitsky, V. P. Vasilevsky, V. V. Volkov. Effect of absorbent vapor on stability of characteristics of a composite PTMSP membrane on nonwoven polyester support during regeneration of diethanolamine solution in membrane contactor. Petroleum Chemistry. 2014; 54 (8):617-621.

Chicago/Turabian Style

S. D. Bazhenov; G. A. Dibrov; E. G. Novitsky; V. P. Vasilevsky; V. V. Volkov. 2014. "Effect of absorbent vapor on stability of characteristics of a composite PTMSP membrane on nonwoven polyester support during regeneration of diethanolamine solution in membrane contactor." Petroleum Chemistry 54, no. 8: 617-621.

Research article
Published: 22 February 2014 in Industrial & Engineering Chemistry Research
Reads 0
Downloads 0

A synthetic method has been used to measure the bubble-point pressures of carbon dioxide (CO2) and methane (CH4), for a temperature range of 303.15–363.15 K and for pressures up to 14 MPa, in the following ionic liquids: 1-ethyl-3-methylimidazolium diethylphosphate [emim][dep], trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate [thtdp][phos], trihexyltetradecylphosphonium dicyanamide [thtdp][dca], 1-allyl-3-methylimidazolium dicyanamide [amim][dca], 1-butyl-1-methylpyrrolidinium dicyanamide [bmpyrr][dca], 1,2,3-tris(diethylamino)cyclopropenylium dicyanamide [cprop][dca], 1,2,3-tris(diethylamino)cyclopropenylium bis(trifluoromethylsulfonyl)imide [cprop][Tf2N], 1-butyl-1-methylpiperidinium bis(trifluoromethylsulfonyl)imide [bmpip][Tf2N], triethylsulfonium bis(trifluoromethylsulfonyl)imide [tes][Tf2N], and methyltrioctylammonium bis(trifluoromethylsulfonyl)imide [toa][Tf2N]. The solubility of CH4 on mole fraction basis is a factor of 10 lower than that of CO2 at similar conditions. Henry constants of CO2 and CH4 in all the ionic liquid (IL) systems are presented, from which the ideal CO2/CH4 selectivities are obtained. The ideal CO2/CH4 selectivities of the investigated ILs are in the range of the conventional solvents like Selexol, Purisol, Rectisol, Fluor Solvent, and sulfolane. The ideal CO2/CH4 selectivity decreases dramatically with increasing temperature and increasing IL molecular weight. Furthermore, the experimental data has been modeled accurately with the Peng–Robinson equation of state in combination with van der Waals mixing rules.

ACS Style

Mahinder Ramdin; Aris Amplianitis; Stepan Bazhenov; Alexey Volkov; Vladimir Volkov; Thijs J.H. Vlugt; Theo W. De Loos. Solubility of CO2 and CH4 in Ionic Liquids: Ideal CO2/CH4 Selectivity. Industrial & Engineering Chemistry Research 2014, 53, 15427 -15435.

AMA Style

Mahinder Ramdin, Aris Amplianitis, Stepan Bazhenov, Alexey Volkov, Vladimir Volkov, Thijs J.H. Vlugt, Theo W. De Loos. Solubility of CO2 and CH4 in Ionic Liquids: Ideal CO2/CH4 Selectivity. Industrial & Engineering Chemistry Research. 2014; 53 (40):15427-15435.

Chicago/Turabian Style

Mahinder Ramdin; Aris Amplianitis; Stepan Bazhenov; Alexey Volkov; Vladimir Volkov; Thijs J.H. Vlugt; Theo W. De Loos. 2014. "Solubility of CO2 and CH4 in Ionic Liquids: Ideal CO2/CH4 Selectivity." Industrial & Engineering Chemistry Research 53, no. 40: 15427-15435.

Research article
Published: 11 February 2014 in Journal of Chemical & Engineering Data
Reads 0
Downloads 0

The solubility of CO2 in two biodegradable ionic liquids tris(2-hydroxyethyl)methylammonium methylsulfate [THMA][MeSO4] and 2-hydroxyethyl-trimethylammonium lactate [2HETMA][Lac] has been studied experimentally. A synthetic method was used to measure bubble-point pressures up to 8 MPa for a temperature range of 313 K to 363 K. The solubility of CO2 in [2HETMA][Lac] is much higher than in [THMA][MeSO4], but the solubility increment is lower at higher CO2 concentrations. The solubility of CO2 in [THMA][MeSO4] is much lower compared to ionic liquids containing the same anion, but lacking hydroxyl-groups in the cation. The hydroxyl-groups required for the biodegradability of the IL have a detrimental effect on the CO2 solubility. [THMA][MeSO4] and [2HETMA][Lac] are not suitable for CO2 capture and can be considered as an example of a contradictive design where the biodegradability is improved upon introducing hydroxyl-groups, while the CO2 solubility is reduced significantly. The experimental data has been modeled with good accuracy using the Peng–Robinson equation of state in combination with the Wong–Sandler mixing rules.

ACS Style

Stepan Bazhenov; Mahinder Ramdin; Alexey Volkov; Vladimir Volkov; Thijs J. H. Vlugt; Theo W. De Loos. CO2 Solubility in Biodegradable Hydroxylammonium-Based Ionic Liquids. Journal of Chemical & Engineering Data 2014, 59, 702 -708.

AMA Style

Stepan Bazhenov, Mahinder Ramdin, Alexey Volkov, Vladimir Volkov, Thijs J. H. Vlugt, Theo W. De Loos. CO2 Solubility in Biodegradable Hydroxylammonium-Based Ionic Liquids. Journal of Chemical & Engineering Data. 2014; 59 (3):702-708.

Chicago/Turabian Style

Stepan Bazhenov; Mahinder Ramdin; Alexey Volkov; Vladimir Volkov; Thijs J. H. Vlugt; Theo W. De Loos. 2014. "CO2 Solubility in Biodegradable Hydroxylammonium-Based Ionic Liquids." Journal of Chemical & Engineering Data 59, no. 3: 702-708.

Journal article
Published: 01 January 2014 in Energy Procedia
Reads 0
Downloads 0

Heat-stable salts (HSS) are well-known degradation products in the acid gas removal technologies with alkanolamines, especially in the post-combustion CO2 Capture processes. The traditionally applied HSS removal methods such as purging, filtration, distillation might be economically unattractive in the large scale post-combustion plant case. Electrodialysis could be an alternative method for solvent reclaiming with removal of electrically charged amine degradation products. This work presents the results of electrodialysis reclaiming concept tested under real operation conditions during pilot campaign at Heilbronn post combustion CO2 Capture pilot plant. The HSS removal results and some process specific parameters are presented

ACS Style

Stepan Bazhenov; Vladimir Vasilevsky; Alexander Rieder; Sven Unterberger; Evgeniia Grushevenko; Vladimir Volkov; Bernd Schallert; Alexey Volkov. Heat Stable Salts (HSS) Removal by Electrodialysis: Reclaiming of MEA Used in Post-combustion CO2-Capture. Energy Procedia 2014, 63, 6349 -6356.

AMA Style

Stepan Bazhenov, Vladimir Vasilevsky, Alexander Rieder, Sven Unterberger, Evgeniia Grushevenko, Vladimir Volkov, Bernd Schallert, Alexey Volkov. Heat Stable Salts (HSS) Removal by Electrodialysis: Reclaiming of MEA Used in Post-combustion CO2-Capture. Energy Procedia. 2014; 63 ():6349-6356.

Chicago/Turabian Style

Stepan Bazhenov; Vladimir Vasilevsky; Alexander Rieder; Sven Unterberger; Evgeniia Grushevenko; Vladimir Volkov; Bernd Schallert; Alexey Volkov. 2014. "Heat Stable Salts (HSS) Removal by Electrodialysis: Reclaiming of MEA Used in Post-combustion CO2-Capture." Energy Procedia 63, no. : 6349-6356.

Journal article
Published: 01 August 2013 in Journal of Membrane Science
Reads 0
Downloads 0
ACS Style

Alexey Volkov; Alexey Yushkin; Alexey Grekhov; Anastasia Shutova; Stepan Bazhenov; Sergey Tsarkov; Valery Khotimsky; Thijs J.H. Vlugt; Vladimir Volkov. Liquid permeation through PTMSP: One polymer for two different membrane applications. Journal of Membrane Science 2013, 440, 98 -107.

AMA Style

Alexey Volkov, Alexey Yushkin, Alexey Grekhov, Anastasia Shutova, Stepan Bazhenov, Sergey Tsarkov, Valery Khotimsky, Thijs J.H. Vlugt, Vladimir Volkov. Liquid permeation through PTMSP: One polymer for two different membrane applications. Journal of Membrane Science. 2013; 440 ():98-107.

Chicago/Turabian Style

Alexey Volkov; Alexey Yushkin; Alexey Grekhov; Anastasia Shutova; Stepan Bazhenov; Sergey Tsarkov; Valery Khotimsky; Thijs J.H. Vlugt; Vladimir Volkov. 2013. "Liquid permeation through PTMSP: One polymer for two different membrane applications." Journal of Membrane Science 440, no. : 98-107.