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Georgios Fytianos
Department of Food Science and Technology, International Hellenic University, 57400 Thessaloniki, Greece

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Journal article
Published: 22 January 2021 in Water
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Concrete sewer pipes can be deteriorated by sulfuric acid (H2SO4), which is created by the oxidation of hydrogen sulfide in the presence of certain bacteria inside the sewers. This process is called biocorrosion. In this paper, H2SO4 (i.e., chemical, non-biogenic) was used to study acid attack on concrete samples. The authors conducted experiments under different acid flows and concentrations, to account for the conditions prevailing in sewage networks exposed to flowing acidic waters. The effect of intermittent stormwater on the removal of protective layers was studied in addition to constant flow runs. Specimens’ erosion depth was measured with a Vernier micrometer. In addition, unconfined compression at an axial strain rate of 0.0016 mm/mm/min was used for the estimation of unconfined compressive strength and elastic modulus. Moreover, the formation of gypsum as a protective layer and its role in biocorrosion was discussed. From this study, it was concluded that although the utilization of constant flowrates of acidic waters represents an important indication of corrosion mechanism, intermittent sewage and water flows should be taken into account, corresponding to real conditions in sewage networks, and resulting into accelerated concrete corrosion. Stormwater in combined sewers could remove the protective gypsum layer, thus accelerating chemical corrosion; however, in the presence of biogenic H2SO4, the removal of gypsum by excess flows due to stormwater could have a positive effect on corrosion mitigation. Finally, for combined sewers, selected coatings should withstand the effect of stormwater and high-velocity water flow tests should be included in future studies.

ACS Style

Georgios Fytianos; Anastasios Tsikrikis; Costas A. Anagnostopoulos; Efthimios Papastergiadis; Petros Samaras. The Inclusion of Acidic and Stormwater Flows in Concrete Sewer Corrosion Mitigation Studies. Water 2021, 13, 261 .

AMA Style

Georgios Fytianos, Anastasios Tsikrikis, Costas A. Anagnostopoulos, Efthimios Papastergiadis, Petros Samaras. The Inclusion of Acidic and Stormwater Flows in Concrete Sewer Corrosion Mitigation Studies. Water. 2021; 13 (3):261.

Chicago/Turabian Style

Georgios Fytianos; Anastasios Tsikrikis; Costas A. Anagnostopoulos; Efthimios Papastergiadis; Petros Samaras. 2021. "The Inclusion of Acidic and Stormwater Flows in Concrete Sewer Corrosion Mitigation Studies." Water 13, no. 3: 261.

Review
Published: 18 January 2021 in Journal of Marine Science and Engineering
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The aim of this paper is to present information gathered from studies regarding the current status and challenges of microplastics (MPs) in Mediterranean coastal counties. MPs are considered emerging pollutants, and their effect on fish and on the final consumer through the trophic food chain are of great concern. Studies from almost all of the Mediterranean coastal countries are gathered and discussed. The source of MPs, as well as their transfer and accumulation are reviewed. In addition, the laboratory techniques for sampling, analysis and characterization of MPs are presented. Moreover, the current regulations for MPs restrictions in Europe will be discussed. Finally, the authors present the current challenges on the topic and provide recommendations for future work.

ACS Style

Georgios Fytianos; Efthimia Ioannidou; Anna Thysiadou; Athanasios C. Mitropoulos; George Z. Kyzas. Microplastics in Mediterranean Coastal Countries: A Recent Overview. Journal of Marine Science and Engineering 2021, 9, 98 .

AMA Style

Georgios Fytianos, Efthimia Ioannidou, Anna Thysiadou, Athanasios C. Mitropoulos, George Z. Kyzas. Microplastics in Mediterranean Coastal Countries: A Recent Overview. Journal of Marine Science and Engineering. 2021; 9 (1):98.

Chicago/Turabian Style

Georgios Fytianos; Efthimia Ioannidou; Anna Thysiadou; Athanasios C. Mitropoulos; George Z. Kyzas. 2021. "Microplastics in Mediterranean Coastal Countries: A Recent Overview." Journal of Marine Science and Engineering 9, no. 1: 98.

Journal article
Published: 23 November 2020 in Materials
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The biological activity occurring in urban sewerage systems usually leads to the (biogenic) corrosion of pipe infrastructure. Anti-corrosion coating technology was developed in an effort to protect sewer pipes from degradation. This study evaluates a new class of relatively low-cost magnesium hydroxide-based coatings, regarding their ability to adhere efficiently onto the concrete surface, and offer efficient corrosion protection. Six magnesium hydroxide-based coatings were prepared with the addition of two different types of cellulose, used as adhesion additives, and these were applied on concrete specimens. Pull-off measurements showed that the addition of higher amounts of cellulose could improve the coating adhesion onto the concrete surface. An accelerated sulfuric acid spraying test was used to evaluate the consumption time of the applied coatings and their efficiency in maintaining over time slightly alkaline pH values (above 8) on the coated/protected surfaces. At the end of spraying test, a mineralogical analysis of surface samples was performed, indicating that the formation of corrosion by-products (mainly gypsum) was increased when the added amount of cellulose was lower. Hardness and roughness measurements were also conducted on the concrete surfaces, revealing that the coatings helped the concrete surface to preserve its initial surface properties, in comparison to the uncoated specimens. A SEM/microstructure analysis showed that aggregates were formed (possibly consisting of Mg(OH)2), affecting the reactivity of the protected surface against sulfuric acid attack.

ACS Style

Domna Merachtsaki; Georgios Fytianos; Efthimios Papastergiadis; Petros Samaras; Haris Yiannoulakis; Anastasios Zouboulis. Properties and Performance of Novel Mg(OH)2-Based Coatings for Corrosion Mitigation in Concrete Sewer Pipes. Materials 2020, 13, 5291 .

AMA Style

Domna Merachtsaki, Georgios Fytianos, Efthimios Papastergiadis, Petros Samaras, Haris Yiannoulakis, Anastasios Zouboulis. Properties and Performance of Novel Mg(OH)2-Based Coatings for Corrosion Mitigation in Concrete Sewer Pipes. Materials. 2020; 13 (22):5291.

Chicago/Turabian Style

Domna Merachtsaki; Georgios Fytianos; Efthimios Papastergiadis; Petros Samaras; Haris Yiannoulakis; Anastasios Zouboulis. 2020. "Properties and Performance of Novel Mg(OH)2-Based Coatings for Corrosion Mitigation in Concrete Sewer Pipes." Materials 13, no. 22: 5291.

Journal article
Published: 09 June 2020 in Polymers
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There are different ways for antibiotics to enter the aquatic environment, with wastewater treatment plants (WWTP) considered to be one of the main points of entrance. Even treated wastewater effluent can contain antibiotics, since WWTP cannot eliminate the presence of antibiotics. Therefore, adsorption can be a sustainable option, compared to other tertiary treatments. In this direction, a versatile synthesis of poly(styrene-block-acrylic acid) diblock copolymer/Fe3O4 magnetic nanocomposite (abbreviated as P(St-b-AAc)/Fe3O4)) was achieved for environmental applications, and particularly for the removal of antibiotic compounds. For this reason, the synthesis of the P(St-b-AAc) diblock copolymer was conducted with a reversible addition fragmentation transfer (RAFT) method. Monodisperse superparamagnetic nanocomposite with carboxylic acid groups of acrylic acid was adsorbed on the surface of Fe3O4 nanoparticles. The nanocomposites were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) analysis. Then, the nanoparticles were applied to remove ciprofloxacin (antibiotic drug compound) from aqueous solutions. The effects of various parameters, such as initial drug concentration, solution pH, adsorbent dosage, and contact time on the process were extensively studied. Operational parameters and their efficacy in the removal of Ciprofloxacin were studied. Kinetic and adsorption isothermal studies were also carried out. The maximum removal efficiency of ciprofloxacin (97.5%) was found at an initial concentration of 5 mg/L, pH 7, adsorbent’s dosage 2 mg/L, contact time equal to 37.5 min. The initial concentration of antibiotic and the dose of the adsorbent presented the highest impact on efficiency. The adsorption of ciprofloxacin was better fitted to Langmuir isotherm (R2 = 0.9995), while the kinetics were better fitted to second-order kinetic equation (R2 = 0.9973).

ACS Style

Leili Mohammadi; Abbas Rahdar; Razieh Khaksefidi; Aliyeh Ghamkhari; Georgios Fytianos; George Z. Kyzas. Polystyrene Magnetic Nanocomposites as Antibiotic Adsorbents. Polymers 2020, 12, 1313 .

AMA Style

Leili Mohammadi, Abbas Rahdar, Razieh Khaksefidi, Aliyeh Ghamkhari, Georgios Fytianos, George Z. Kyzas. Polystyrene Magnetic Nanocomposites as Antibiotic Adsorbents. Polymers. 2020; 12 (6):1313.

Chicago/Turabian Style

Leili Mohammadi; Abbas Rahdar; Razieh Khaksefidi; Aliyeh Ghamkhari; Georgios Fytianos; George Z. Kyzas. 2020. "Polystyrene Magnetic Nanocomposites as Antibiotic Adsorbents." Polymers 12, no. 6: 1313.

Journal article
Published: 06 June 2020 in Membranes
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Membrane fouling investigations in membrane bioreactors (MBRs) are a top research issue. The aim of this work is to study the combined effect of colloids and soluble microbial products (SMPs) on membrane fouling. Two lab-pilot MBRs were investigated for treating two types of wastewater (wwt), synthetic and domestic. Transmembrane pressure (TMP), SMP, particle size distribution and treatment efficiency were evaluated. Chemical Oxygen Demand (COD) removal and nitrification were successful for both kinds of sewage reaching up to 95–97% and 100%, respectively. Domestic wwt presented 5.5 times more SMP proteins and 11 times more SMP carbohydrates compared to the synthetic one. In contrast, synthetic wwt had around 20% more colloids in the mixed liquor with a size lower than membrane pore size (

ACS Style

Dimitra Banti; Manassis Mitrakas; Georgios Fytianos; Alexandra Tsali; Petros Samaras. Combined Effect of Colloids and SMP on Membrane Fouling in MBRs. Membranes 2020, 10, 118 .

AMA Style

Dimitra Banti, Manassis Mitrakas, Georgios Fytianos, Alexandra Tsali, Petros Samaras. Combined Effect of Colloids and SMP on Membrane Fouling in MBRs. Membranes. 2020; 10 (6):118.

Chicago/Turabian Style

Dimitra Banti; Manassis Mitrakas; Georgios Fytianos; Alexandra Tsali; Petros Samaras. 2020. "Combined Effect of Colloids and SMP on Membrane Fouling in MBRs." Membranes 10, no. 6: 118.

Journal article
Published: 04 June 2020 in Sustainability
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The changing role of the municipal water and wastewater authorities, together with the need for a sustainable maintenance treatment in the sewer systems, have been the catalysts for the integration of technical and financial information into asset management systems. This paper presents results from a cost-comparative analysis focusing on an annuities calculation for the evaluation of microbiologically induced corrosion (MIC) or biocorrosion mitigation methodologies used in the maintenance of concrete sewers. The replacement cost of deteriorated sewer concrete pipes is high, and MIC mitigation methods can be used to increase the current service life of concrete pipes. From the MIC mitigation methods that are frequently used, the authors examined those of flushing with high-pressure water (i.e., a common method used in Greece), and spraying with magnesium hydroxide slurry (MHS). The authors chose four different cities for the assessment, which presented different sewer characteristics and socioeconomic backgrounds. In addition, all methods for concrete sewer MIC mitigation were compared to the present value of replacement of sewer concrete pipes with new PVC ones. Results showed that flushing with high-pressure water is very cost demanding and should be avoided, while spraying with MHS could be a sustainable and economic solution in the long term.

ACS Style

Georgios Fytianos; Emmanouil Tziolas; Efthimios Papastergiadis; Petros Samaras. Least Cost Analysis for Biocorrosion Mitigation Strategies in Concrete Sewers. Sustainability 2020, 12, 4578 .

AMA Style

Georgios Fytianos, Emmanouil Tziolas, Efthimios Papastergiadis, Petros Samaras. Least Cost Analysis for Biocorrosion Mitigation Strategies in Concrete Sewers. Sustainability. 2020; 12 (11):4578.

Chicago/Turabian Style

Georgios Fytianos; Emmanouil Tziolas; Efthimios Papastergiadis; Petros Samaras. 2020. "Least Cost Analysis for Biocorrosion Mitigation Strategies in Concrete Sewers." Sustainability 12, no. 11: 4578.

Review
Published: 20 May 2020 in Nanomaterials
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This review paper collects the recent updates regarding the use of nanomaterials in cosmetics. Special focus is given to the applications of nanomaterials in the cosmetic industry, their unique features, as well as the advantages of nanoscale ingredients compared to non-nanoscale products. The state-of-the-art practices for physicochemical and toxicological characterization of nanomaterials are also reviewed. Moreover, special focus is given to the current regulations and safety assessments that are currently in place regarding the use of nanomaterials in cosmetics—the new 2019 European guidance for the safety assessment of nanomaterials in cosmetics, together with the new proposed methodologies for the toxicity evaluation of nanomaterials. Concerns over health risks have limited the further incorporation of nanomaterials in cosmetics, and since new nanomaterials may be used in the future by the cosmetic industry, a detailed characterization and risk assessment are needed to fulfill the standard safety requirements.

ACS Style

Georgios Fytianos; Abbas Rahdar; George Z. Kyzas. Nanomaterials in Cosmetics: Recent Updates. Nanomaterials 2020, 10, 979 .

AMA Style

Georgios Fytianos, Abbas Rahdar, George Z. Kyzas. Nanomaterials in Cosmetics: Recent Updates. Nanomaterials. 2020; 10 (5):979.

Chicago/Turabian Style

Georgios Fytianos; Abbas Rahdar; George Z. Kyzas. 2020. "Nanomaterials in Cosmetics: Recent Updates." Nanomaterials 10, no. 5: 979.

Journal article
Published: 26 March 2020 in Sustainability
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This paper is intended to review the current practices and challenges regarding the corrosion of the Greek sewer systems with an emphasis on biocorrosion and to provide recommendations to avoid it. The authors followed a holistic approach, which included survey data obtained by local authorities serving more than 50% of the total country’s population and validated the survey answers with field measurements and analyses. The exact nature and extent of concrete biocorrosion problems in Greece are presented for the first time. Moreover, the overall condition of the sewer network, the maintenance frequency, and the corrosion prevention techniques used in Greece are also presented. Results from field measurements showed the existence of H2S in the gaseous phase (i.e., precursor of the H2SO4 formation in the sewer) and acidithiobacillus bacteria (i.e., biocorrosion causative agent) in the slime, which exists at the interlayer between the concrete wall and the sewage. Biocorrosion seems to mainly affect old concrete networks, and the replacement of the destroyed concrete pipes with new polyvinyl chloride (PVC) ones is currently common practice. However, in most cases, the replacement cost is high, and the authors provide some recommendations to increase the current service life of concrete pipes.

ACS Style

Georgios Fytianos; Vasilis Baltikas; Dimitrios Loukovitis; Dimitra Banti; Athanasios Sfikas; Efthimios Papastergiadis; Petros Samaras. Biocorrosion of Concrete Sewers in Greece: Current Practices and Challenges. Sustainability 2020, 12, 2638 .

AMA Style

Georgios Fytianos, Vasilis Baltikas, Dimitrios Loukovitis, Dimitra Banti, Athanasios Sfikas, Efthimios Papastergiadis, Petros Samaras. Biocorrosion of Concrete Sewers in Greece: Current Practices and Challenges. Sustainability. 2020; 12 (7):2638.

Chicago/Turabian Style

Georgios Fytianos; Vasilis Baltikas; Dimitrios Loukovitis; Dimitra Banti; Athanasios Sfikas; Efthimios Papastergiadis; Petros Samaras. 2020. "Biocorrosion of Concrete Sewers in Greece: Current Practices and Challenges." Sustainability 12, no. 7: 2638.

Conference paper
Published: 01 May 2018 in 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)
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When evaluating the partial pressure of CO2 (pCO2) and the dissolved oxygen (DO) saturation, it is known that there is an approximate linear correlation between them. Tomakomai, Japan is known as the transition area of two currents]. Both warm water derived from Kuroshio Current and cold water derived from Oyashio Current into this area. The values of pCO2 can be different in these two waters. Thus, we thought that there may be more than one straight line. In this paper, we classified the pCO2 and DO saturation data and proposed appropriate correlations between them for approximation, using a temperature-salinity diagram.

ACS Style

Shunsuke Nishimura; Toru Sato; Hiroyuki Oyama; Georgios Fytianos; Keisuke Uchimoto; Koichi Goto. Classification of pCO2-DO Correlations of Seawater off Tomakomai. 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO) 2018, 1 -6.

AMA Style

Shunsuke Nishimura, Toru Sato, Hiroyuki Oyama, Georgios Fytianos, Keisuke Uchimoto, Koichi Goto. Classification of pCO2-DO Correlations of Seawater off Tomakomai. 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO). 2018; ():1-6.

Chicago/Turabian Style

Shunsuke Nishimura; Toru Sato; Hiroyuki Oyama; Georgios Fytianos; Keisuke Uchimoto; Koichi Goto. 2018. "Classification of pCO2-DO Correlations of Seawater off Tomakomai." 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO) , no. : 1-6.

Journal article
Published: 01 January 2018 in Journal of Petroleum Science and Engineering
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ACS Style

Takero Yoshida; Paul Brumby; Hiroyuki Oyama; Georgios Fytianos; Toru Sato; Ryosuke Sakaizawa; Tatsuya Fuji; Jiro Nagao; Norio Tenma; Hideo Narita. Modeling of shear stress distribution on mud surface in the subsea sand-mud alternate layer. Journal of Petroleum Science and Engineering 2018, 160, 531 -536.

AMA Style

Takero Yoshida, Paul Brumby, Hiroyuki Oyama, Georgios Fytianos, Toru Sato, Ryosuke Sakaizawa, Tatsuya Fuji, Jiro Nagao, Norio Tenma, Hideo Narita. Modeling of shear stress distribution on mud surface in the subsea sand-mud alternate layer. Journal of Petroleum Science and Engineering. 2018; 160 ():531-536.

Chicago/Turabian Style

Takero Yoshida; Paul Brumby; Hiroyuki Oyama; Georgios Fytianos; Toru Sato; Ryosuke Sakaizawa; Tatsuya Fuji; Jiro Nagao; Norio Tenma; Hideo Narita. 2018. "Modeling of shear stress distribution on mud surface in the subsea sand-mud alternate layer." Journal of Petroleum Science and Engineering 160, no. : 531-536.

Journal article
Published: 01 November 2016 in Journal of Natural Gas Science and Engineering
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ACS Style

Takero Yoshida; Takuya Yamaguchi; Hiroyuki Oyama; Toru Sato; Georgios Fytianos; Yuki Kano; Jiro Nagao; Norio Tenma; Hideo Narita; Paul E. Brumby. Pore-scale numerical simulation of mud erosion in the subsea sand–mud alternate layer using lattice Boltzmann method. Journal of Natural Gas Science and Engineering 2016, 36, 62 -70.

AMA Style

Takero Yoshida, Takuya Yamaguchi, Hiroyuki Oyama, Toru Sato, Georgios Fytianos, Yuki Kano, Jiro Nagao, Norio Tenma, Hideo Narita, Paul E. Brumby. Pore-scale numerical simulation of mud erosion in the subsea sand–mud alternate layer using lattice Boltzmann method. Journal of Natural Gas Science and Engineering. 2016; 36 ():62-70.

Chicago/Turabian Style

Takero Yoshida; Takuya Yamaguchi; Hiroyuki Oyama; Toru Sato; Georgios Fytianos; Yuki Kano; Jiro Nagao; Norio Tenma; Hideo Narita; Paul E. Brumby. 2016. "Pore-scale numerical simulation of mud erosion in the subsea sand–mud alternate layer using lattice Boltzmann method." Journal of Natural Gas Science and Engineering 36, no. : 62-70.

Journal article
Published: 01 July 2016 in International Journal of Greenhouse Gas Control
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In amine based post-combustion CO2 capture and storage, solvent degradation and corrosion of steel materials are the main operational challenges. In this paper the focus was on minimizing degradation and corrosion by addition of inhibitors. The tested amine solution was 30 wt% of the benchmark solvent ethanolamine (MEA). The tested inhibitors were pyrogallol, alpha,alpha′-(1-methylethylenediimino)di-ortho-cresol, carbohydrazide, 2-butanone oxime (MEKO), tricine and 1,3-diaminopropane-N,N,N′,N′-tetraacetic acid (PDTA). The tests were performed under oxidative degradation conditions. After two weeks, PDTA showed the best inhibition performance. In addition to the oxidative degradation experiments, the thermal stability of carbohydrazide and PDTA were tested at 120 °C. After 2 weeks at stripper conditions, the PDTA loss was less than 50%. However, PDTA showed high metal concentration, indicating possible corrosion problems on the steel surface. Carbohydrazide, on the other hand, showed excellent corrosion protection properties, but it is not stable at 120 °C.

ACS Style

Georgios Fytianos; Solrun J. Vevelstad; Hanna K. Knuutila. Degradation and corrosion inhibitors for MEA-based CO2 capture plants. International Journal of Greenhouse Gas Control 2016, 50, 240 -247.

AMA Style

Georgios Fytianos, Solrun J. Vevelstad, Hanna K. Knuutila. Degradation and corrosion inhibitors for MEA-based CO2 capture plants. International Journal of Greenhouse Gas Control. 2016; 50 ():240-247.

Chicago/Turabian Style

Georgios Fytianos; Solrun J. Vevelstad; Hanna K. Knuutila. 2016. "Degradation and corrosion inhibitors for MEA-based CO2 capture plants." International Journal of Greenhouse Gas Control 50, no. : 240-247.

Journal article
Published: 01 March 2016 in International Journal of Greenhouse Gas Control
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Two of the main challenges in post-combustion CO2 capture with ethanolamine are solvent degradation and material corrosion. It has been shown that there is a correlation between degradation and corrosion. The present paper examines this correlation by studying the effect of 10 MEA degradation products on corrosion. Thermal degradation experiments were conducted under stripper conditions for 5 weeks. 30 wt% MEA solution with 1 wt% of the various degradation products was placed in 316 SS cylinders and stored in a thermostat chamber at 135 °C. ICP-MS was used for the metal concentration analyses for all the solutions, while ion chromatography was used for the quantitative determination of heat stable salts anions and MEA concentrations. The solutions were also analysed for degradation products in order to study the formation and thermal stability of these compounds. For corrosion monitoring, in addition to ICP-MS analyses, SEM–EDS was used for examining the cylinders’ surface morphology and elemental composition while XRD was used for corrosion product identification. In the present paper, the influence of the secondary degradation products on corrosion is studied. Results show that some specific degradation products, such as Bicine, HeGly and HEEDA, enhance corrosion while others do not seem to have a significant effect on corrosion of stainless steel.

ACS Style

Georgios Fytianos; Seniz Ucar; Andreas Grimstvedt; Astrid Hyldbakk; Hallvard F. Svendsen; Hanna Katariina Knuutila. Corrosion and degradation in MEA based post-combustion CO2 capture. International Journal of Greenhouse Gas Control 2016, 46, 48 -56.

AMA Style

Georgios Fytianos, Seniz Ucar, Andreas Grimstvedt, Astrid Hyldbakk, Hallvard F. Svendsen, Hanna Katariina Knuutila. Corrosion and degradation in MEA based post-combustion CO2 capture. International Journal of Greenhouse Gas Control. 2016; 46 ():48-56.

Chicago/Turabian Style

Georgios Fytianos; Seniz Ucar; Andreas Grimstvedt; Astrid Hyldbakk; Hallvard F. Svendsen; Hanna Katariina Knuutila. 2016. "Corrosion and degradation in MEA based post-combustion CO2 capture." International Journal of Greenhouse Gas Control 46, no. : 48-56.

Proceedings article
Published: 01 January 2016 in 2016 Techno-Ocean (Techno-Ocean)
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In order to meet future challenges in subsea production and processing compact systems for hydrate control and selective H2S/CO2 removal can be used. The development of an amine-based regenerative process whereby both water and H2S/CO2 are removed may involve corrosion problems. In this study, the amine stability and corrosion tendencies of 30 wt% aqueous solutions of 2-ethanolamine and N-Methydiethanolamine under high temperatures in presence of MEG/TEG, have been experimentally studied. The results show that the presence of MEG/TEG (in the absence of water) influence both the amine degradation and corrosion. Furthermore, the results indicate that the influence of MEG or TEG is dependent on the amine used.

ACS Style

Usman Shoukat; Georgios Fytianos; Hanna K. Knuutila. Thermal stability and corrosion studies of amines for combined acid gas removal and hydrate control for subsea gas treatment systems. 2016 Techno-Ocean (Techno-Ocean) 2016, 176 -180.

AMA Style

Usman Shoukat, Georgios Fytianos, Hanna K. Knuutila. Thermal stability and corrosion studies of amines for combined acid gas removal and hydrate control for subsea gas treatment systems. 2016 Techno-Ocean (Techno-Ocean). 2016; ():176-180.

Chicago/Turabian Style

Usman Shoukat; Georgios Fytianos; Hanna K. Knuutila. 2016. "Thermal stability and corrosion studies of amines for combined acid gas removal and hydrate control for subsea gas treatment systems." 2016 Techno-Ocean (Techno-Ocean) , no. : 176-180.

Journal article
Published: 01 January 2016 in Energy Procedia
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The target of this work is to evaluate three analytical techniques, ICP-MS, SEM-EDS and XRD, which can be applied in corrosion monitoring of ethanolamine based post-combustion CO2 capture plants. The work is based on analyses of the solvent and 316 SS cylinders used in thermal degradation experiments. ICP-MS is used for the determination of total Fe, Cr and Ni of the solutions as an indication of corrosivity. Additionally, the cylinder surface was examined with SEM-EDS and XRD was used for the identification of corrosion products. Finally, a discussion is given on the various techniques, their limitations and advantages.

ACS Style

Georgios Fytianos; Seniz Ucar; Andreas Grimstvedt; Hallvard F. Svendsen; Hanna Knuutila. Corrosion Evaluation of MEA Solutions by SEM-EDS, ICP-MS and XRD. Energy Procedia 2016, 86, 197 -204.

AMA Style

Georgios Fytianos, Seniz Ucar, Andreas Grimstvedt, Hallvard F. Svendsen, Hanna Knuutila. Corrosion Evaluation of MEA Solutions by SEM-EDS, ICP-MS and XRD. Energy Procedia. 2016; 86 ():197-204.

Chicago/Turabian Style

Georgios Fytianos; Seniz Ucar; Andreas Grimstvedt; Hallvard F. Svendsen; Hanna Knuutila. 2016. "Corrosion Evaluation of MEA Solutions by SEM-EDS, ICP-MS and XRD." Energy Procedia 86, no. : 197-204.

Journal article
Published: 01 November 2015 in International Journal of Greenhouse Gas Control
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In post-combustion CO2 capture (PCCC) with amine-based solvents, determining the amount of amine components present in the liquid phase is essential. The quantification of the solvent should be fast, accurate and simple. Toward this direction, suppressed cation exchange chromatography can be a powerful tool for the determination of the amines and their degradation products. In this paper, validated methods for 12 commercial amines and 2 degradation products were developed. The amines included primary, secondary and tertiary alkanolamines, polyamines as well as cyclic amines. Amines were determined with the chromatographic system Dionex Thermo Scientific ICS-5000 with CS19 as column and CG19 as guard column. A thermoscientific conductivity detector was used for identifying the various analytes. The validated methods were used for quantitative analysis and the coefficient of determination was greater than 0.99. Moreover, applications for determination of amines from pilot plant studies, trace analysis of cationic species and analysis of degraded samples are presented. Finally, it was shown that amine concentrations can be determined fast and accurate with CS19 without any special sample preparation.

ACS Style

Georgios Fytianos; Robin Callot; Hallvard F. Svendsen; Hanna K. Knuutila. Quantitative determination of amines used in post-combustion CO 2 capture process by ion chromatography. International Journal of Greenhouse Gas Control 2015, 42, 372 -378.

AMA Style

Georgios Fytianos, Robin Callot, Hallvard F. Svendsen, Hanna K. Knuutila. Quantitative determination of amines used in post-combustion CO 2 capture process by ion chromatography. International Journal of Greenhouse Gas Control. 2015; 42 ():372-378.

Chicago/Turabian Style

Georgios Fytianos; Robin Callot; Hallvard F. Svendsen; Hanna K. Knuutila. 2015. "Quantitative determination of amines used in post-combustion CO 2 capture process by ion chromatography." International Journal of Greenhouse Gas Control 42, no. : 372-378.

Journal article
Published: 01 December 2014 in International Journal of Greenhouse Gas Control
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ACS Style

Diego D.D. Pinto; Hanna Knuutila; Georgios Fytianos; Geir Haugen; Thor Mejdell; Hallvard F. Svendsen. CO2 post combustion capture with a phase change solvent. Pilot plant campaign. International Journal of Greenhouse Gas Control 2014, 31, 153 -164.

AMA Style

Diego D.D. Pinto, Hanna Knuutila, Georgios Fytianos, Geir Haugen, Thor Mejdell, Hallvard F. Svendsen. CO2 post combustion capture with a phase change solvent. Pilot plant campaign. International Journal of Greenhouse Gas Control. 2014; 31 ():153-164.

Chicago/Turabian Style

Diego D.D. Pinto; Hanna Knuutila; Georgios Fytianos; Geir Haugen; Thor Mejdell; Hallvard F. Svendsen. 2014. "CO2 post combustion capture with a phase change solvent. Pilot plant campaign." International Journal of Greenhouse Gas Control 31, no. : 153-164.

Journal article
Published: 01 January 2014 in Energy Procedia
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Amine degradation and corrosion can be a severe operational problem in the CO2 absorption process. In this paper the effect of MEA's degradation products on corrosion is studied. Different solutions of MEA 30wt% containing also 1wt% of a specific degradation product were placed in 316 stainless steel cylinders and stored in a thermostat chamber at 135oC. Samples are analysed for Fe, Cr, Ni and Mo by ICP-MS as an indication of corrosivity. The results showed that after 5 weeks loaded MEA 30wt% with 1wt% oxalic acid was the most corrosive solution

ACS Style

Georgios Fytianos; Andreas Grimstvedt; Hanna Katariina Knuutila; Hallvard F. Svendsen. Effect of MEA's Degradation Products on Corrosion at CO2 Capture Plants. Energy Procedia 2014, 63, 1869 -1875.

AMA Style

Georgios Fytianos, Andreas Grimstvedt, Hanna Katariina Knuutila, Hallvard F. Svendsen. Effect of MEA's Degradation Products on Corrosion at CO2 Capture Plants. Energy Procedia. 2014; 63 ():1869-1875.

Chicago/Turabian Style

Georgios Fytianos; Andreas Grimstvedt; Hanna Katariina Knuutila; Hallvard F. Svendsen. 2014. "Effect of MEA's Degradation Products on Corrosion at CO2 Capture Plants." Energy Procedia 63, no. : 1869-1875.