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Post combustion CO2 capture is still a rather energy intense, and therefore expensive, process. Much of the current research for reducing the process energy requirements is focused on the regeneration section. A good description of the vapor liquid equilibrium of the solvent is necessary for the accurate representation of the process. 3-(Diethylamino)-1,2-propanediol (DEA-12-PD) and 1-(2-hydroxyethyl)piperidine (12-HEPP) have been proposed as potential components in solvent blends for the membrane contactor. However, there are few available experimental data for these two tertiary amines making difficult to accurate simulate such process. In this work, we provide experimental data on the pure component saturation pressure (383 to 443 K) and on VLE of aqueous solutions of these amines (313 to 373 K) in order to fill part of the data gap. The data were used to estimate model parameters used to represent the data. The saturation pressure was modeled using the Antoine equation and the deviation is calculated lower than 2%. The NRTL model was used in this work to calculate the activity coefficients in the aqueous systems. The deviations in pressure for the aqueous systems were lower than 5% in both systems.
Diego D. D. Pinto; Znar Zahraee; Vanja Buvik; Ardi Hartono; Hanna K. Knuutila. Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture. Processes 2019, 7, 951 .
AMA StyleDiego D. D. Pinto, Znar Zahraee, Vanja Buvik, Ardi Hartono, Hanna K. Knuutila. Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture. Processes. 2019; 7 (12):951.
Chicago/Turabian StyleDiego D. D. Pinto; Znar Zahraee; Vanja Buvik; Ardi Hartono; Hanna K. Knuutila. 2019. "Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture." Processes 7, no. 12: 951.
Accurate representation of the physical properties of a solvent is essential for design and simulation of processes. Density and viscosity, for instance, have an important role in modelling and designing absorption and desorption towers. In the present work, a model to accurately calculate the density of aqueous amine solutions used in CO2 capture was developed as a function of temperature and composition. The model is based on excess Gibbs energy functions, and in this work the functional form of the non-random two-liquid (NRTL) model was used. The model is able to accurately represent the density of the tested systems with deviations below 0.2% for most cases. The pure component density was calculated using the modified Rackett equation with the parameter ZRA as a function of the temperature and pressure of the system. The calculated deviation (AARD) for pure component density was below 0.09%.
Diego D. D. Pinto; Hanna K. Knuutila. DENSITY CALCULATIONS OF AQUEOUS AMINE SOLUTIONS USING AN EXCESS GIBBS BASED MODEL. Brazilian Journal of Chemical Engineering 2019, 36, 1075 -1087.
AMA StyleDiego D. D. Pinto, Hanna K. Knuutila. DENSITY CALCULATIONS OF AQUEOUS AMINE SOLUTIONS USING AN EXCESS GIBBS BASED MODEL. Brazilian Journal of Chemical Engineering. 2019; 36 (3):1075-1087.
Chicago/Turabian StyleDiego D. D. Pinto; Hanna K. Knuutila. 2019. "DENSITY CALCULATIONS OF AQUEOUS AMINE SOLUTIONS USING AN EXCESS GIBBS BASED MODEL." Brazilian Journal of Chemical Engineering 36, no. 3: 1075-1087.
Various novel amine solutions both in aqueous and non-aqueous [monoethylene glycol (MEG)/triethylene glycol(TEG)] forms have been studied for hydrogen sulfide (H2S) absorption. The study was conducted in a custom build experimental setup at temperatures relevant to subsea operation conditions and atmospheric pressure. Liquid phase absorbed H2S, and amine concentrations were measured analytically to calculate H2S loading (mole of H2S/mole of amine). Maximum achieved H2S loadings as the function of pKa, gas partial pressure, temperature and amine concentration are presented. Effects of solvent type on absorbed H2S have also been discussed. Several new solvents showed higher H2S loading as compared to aqueous N-Methyldiethanolamine (MDEA) solution which is the current industrial benchmark compound for selective H2S removal in natural gas sweetening process.
Usman Shoukat; Diego D. D. Pinto; Hanna K. Knuutila. Study of Various Aqueous and Non-Aqueous Amine Blends for Hydrogen Sulfide Removal from Natural Gas. Processes 2019, 7, 160 .
AMA StyleUsman Shoukat, Diego D. D. Pinto, Hanna K. Knuutila. Study of Various Aqueous and Non-Aqueous Amine Blends for Hydrogen Sulfide Removal from Natural Gas. Processes. 2019; 7 (3):160.
Chicago/Turabian StyleUsman Shoukat; Diego D. D. Pinto; Hanna K. Knuutila. 2019. "Study of Various Aqueous and Non-Aqueous Amine Blends for Hydrogen Sulfide Removal from Natural Gas." Processes 7, no. 3: 160.
Usman Shoukat; Eva Baumeister; Diego D.D. Pinto; Hanna K. Knuutila. Thermal stability and corrosion of tertiary amines in aqueous amine and amine-glycol-water solutions for combined acid gas and water removal. Journal of Natural Gas Science and Engineering 2019, 62, 26 -37.
AMA StyleUsman Shoukat, Eva Baumeister, Diego D.D. Pinto, Hanna K. Knuutila. Thermal stability and corrosion of tertiary amines in aqueous amine and amine-glycol-water solutions for combined acid gas and water removal. Journal of Natural Gas Science and Engineering. 2019; 62 ():26-37.
Chicago/Turabian StyleUsman Shoukat; Eva Baumeister; Diego D.D. Pinto; Hanna K. Knuutila. 2019. "Thermal stability and corrosion of tertiary amines in aqueous amine and amine-glycol-water solutions for combined acid gas and water removal." Journal of Natural Gas Science and Engineering 62, no. : 26-37.
Aqueous polyalkylated imidazoles have gained interest as potential CO2 capture solvents due to their high oxidative stability and low vapor pressures compared to traditional amines. In this work, 21 aqueous solutions of polyalkylatedimidazoles were screened as absorbents for CO2 capture and four solvent candidates were further characterized by measuring the vapor-liquid equilibria and the heat of absorption of CO2. The pKa values of the imidazoles were measured and a positive correlation between the absorption capacity and pKa of polyalkylated imidazoles was found. Increasing the pKa of imidazoles to 9 by alkylation improved the CO2 absorption capacity significantly. Based on the equilibrium experiments, the cyclic capacities of the selected solvents varied from 0.8 to 2 mol CO2/kg solvent. Furthermore, the heat of absorption of CO2 of the studied imidazoles was lower compared to primary amines. In general, the tested polyalkylated imidazoles are more feasible for processes with partial pressures of CO2 above 50 kPa. Trimethylimidazole that forms bicarbonate precipitate might be applicable for post combustion CO2 capture as a high cyclic capacity is obtained even at CO2 partial pressures around 10 kPa. The present study gives new important knowledge of the absorption properties of polyalkylated imidazoles.
Sigvart Evjen; Anne Fiksdahl; Diego Pinto; Hanna K. Knuutila. New polyalkylated imidazoles tailored for carbon dioxide capture. International Journal of Greenhouse Gas Control 2018, 76, 167 -174.
AMA StyleSigvart Evjen, Anne Fiksdahl, Diego Pinto, Hanna K. Knuutila. New polyalkylated imidazoles tailored for carbon dioxide capture. International Journal of Greenhouse Gas Control. 2018; 76 ():167-174.
Chicago/Turabian StyleSigvart Evjen; Anne Fiksdahl; Diego Pinto; Hanna K. Knuutila. 2018. "New polyalkylated imidazoles tailored for carbon dioxide capture." International Journal of Greenhouse Gas Control 76, no. : 167-174.
The diamine 3-(methylamino)propylamine (MAPA) and eight tertiary amines were studied as single and blended aqueous CO2 absorbents at different concentrations and ratios to investigate their reaction mechanisms. After absorption (40 °C) and desorption (80 °C) experiments, quantitative 13C NMR experiments were performed on each liquid sample. After absorption, the following CO2-derived species were identified and quantified: (bi)carbonate in each amine system, primary and secondary MAPA carbamate and MAPA dicarbamate in MAPA systems, and tertiary amine carbonate in tertiary amine systems. Concerning desorption, the main CO2 species removed was (bi)carbonate, followed in the blends by MAPA dicarbamate. Since, after CO2 absorption, the concentration of MAPA dicarbamate was negligible in single MAPA and, in the blends, mainly increased at increasing pKa of the tertiary amines, it is concluded that the tertiary amines increase the availability of MAPA species to react further with CO2. MAPA and tertiary amines appear to influence each other also for the CO2 release.
Cristina Perinu; Ida M. Bernhardsen; Diego D. D. Pinto; Hanna K. Knuutila; Klaus-J. Jens. NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO2: Influence of pKa and Reaction Mechanisms. Industrial & Engineering Chemistry Research 2018, 57, 1337 -1349.
AMA StyleCristina Perinu, Ida M. Bernhardsen, Diego D. D. Pinto, Hanna K. Knuutila, Klaus-J. Jens. NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO2: Influence of pKa and Reaction Mechanisms. Industrial & Engineering Chemistry Research. 2018; 57 (5):1337-1349.
Chicago/Turabian StyleCristina Perinu; Ida M. Bernhardsen; Diego D. D. Pinto; Hanna K. Knuutila; Klaus-J. Jens. 2018. "NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO2: Influence of pKa and Reaction Mechanisms." Industrial & Engineering Chemistry Research 57, no. 5: 1337-1349.
Ida M. Bernhardsen; Iris R.T. Krokvik; Cristina Perinu; Diego D.D. Pinto; Klaus J. Jens; Hanna K. Knuutila. Influence of pKa on solvent performance of MAPA promoted tertiary amines. International Journal of Greenhouse Gas Control 2018, 68, 68 -76.
AMA StyleIda M. Bernhardsen, Iris R.T. Krokvik, Cristina Perinu, Diego D.D. Pinto, Klaus J. Jens, Hanna K. Knuutila. Influence of pKa on solvent performance of MAPA promoted tertiary amines. International Journal of Greenhouse Gas Control. 2018; 68 ():68-76.
Chicago/Turabian StyleIda M. Bernhardsen; Iris R.T. Krokvik; Cristina Perinu; Diego D.D. Pinto; Klaus J. Jens; Hanna K. Knuutila. 2018. "Influence of pKa on solvent performance of MAPA promoted tertiary amines." International Journal of Greenhouse Gas Control 68, no. : 68-76.
Diego D.D. Pinto; Birgit Johnsen; Muhammad Awais; Hallvard F. Svendsen; Hanna K. Knuutila. Viscosity measurements and modeling of loaded and unloaded aqueous solutions of MDEA, DMEA, DEEA and MAPA. Chemical Engineering Science 2017, 171, 340 -350.
AMA StyleDiego D.D. Pinto, Birgit Johnsen, Muhammad Awais, Hallvard F. Svendsen, Hanna K. Knuutila. Viscosity measurements and modeling of loaded and unloaded aqueous solutions of MDEA, DMEA, DEEA and MAPA. Chemical Engineering Science. 2017; 171 ():340-350.
Chicago/Turabian StyleDiego D.D. Pinto; Birgit Johnsen; Muhammad Awais; Hallvard F. Svendsen; Hanna K. Knuutila. 2017. "Viscosity measurements and modeling of loaded and unloaded aqueous solutions of MDEA, DMEA, DEEA and MAPA." Chemical Engineering Science 171, no. : 340-350.
Koteswara Rao Putta; Diego D.D. Pinto; Hallvard F. Svendsen; Hanna K. Knuutila. CO 2 absorption into loaded aqueous MEA solutions: Kinetics assessment using penetration theory. International Journal of Greenhouse Gas Control 2016, 53, 338 -353.
AMA StyleKoteswara Rao Putta, Diego D.D. Pinto, Hallvard F. Svendsen, Hanna K. Knuutila. CO 2 absorption into loaded aqueous MEA solutions: Kinetics assessment using penetration theory. International Journal of Greenhouse Gas Control. 2016; 53 ():338-353.
Chicago/Turabian StyleKoteswara Rao Putta; Diego D.D. Pinto; Hallvard F. Svendsen; Hanna K. Knuutila. 2016. "CO 2 absorption into loaded aqueous MEA solutions: Kinetics assessment using penetration theory." International Journal of Greenhouse Gas Control 53, no. : 338-353.
The absorption process is strongly influenced by the effective contact area. In absorber columns, this is related to the type of the internals used in the columns. Therefore, a good representation of the effective mass-transfer area and mass-transfer coefficients (kL or kg) is also essential for accurately represent and design a process. For CO2 capture process packed columns are usually preferred. The mass transfer area and coefficients for several packing (both structured and random) are correlated elsewhere. In this work mass transfer experiments using concentrated MEA solution in the Procede acid gas treating pilot plant are performed. However, due to the fast reaction between MEA and CO2, both the gas side and liquid side mass transfer resistances are relevant and the mass transfer area cannot be determined experimentally. Nevertheless, the volumetric mass transfer coefficient is calculated and it showed to be relatively constant for all the runs. The results from the pilot plant are compared to simulated results using Procede Process Simulator (PPS). The mass transfer area and mass transfer coefficients were calculated through the default correlations implemented in PPS. Very good agreement is achieved between the experimental and simulated results.
Diego D.D. Pinto; Rob Emonds; Geert F. Versteeg. Experimental Determination of Mass-transfer Coefficients and Area of Dumped Packing Using Alkanolamine Solvents. Energy Procedia 2016, 86, 219 -228.
AMA StyleDiego D.D. Pinto, Rob Emonds, Geert F. Versteeg. Experimental Determination of Mass-transfer Coefficients and Area of Dumped Packing Using Alkanolamine Solvents. Energy Procedia. 2016; 86 ():219-228.
Chicago/Turabian StyleDiego D.D. Pinto; Rob Emonds; Geert F. Versteeg. 2016. "Experimental Determination of Mass-transfer Coefficients and Area of Dumped Packing Using Alkanolamine Solvents." Energy Procedia 86, no. : 219-228.
Solution densities and viscosities are important parameters for the design and simulation of absorption processes. Accurate models are needed and in this work, a new model for calculating the liquid viscosity of mixtures is presented. The model uses an analogy to excess Gibbs energy models to account for the deviation from a simple mixing rule based on the pure component viscosities. In this work, we chose the functional form of the NRTL model to represent the excess Gibbs energy and the resulting model is referred to as NRTL-DVIS. Eleven systems (eight binaries and three ternary) were chosen for testing the accuracy of the model. The ternary systems were built from the optimized binaries and pure component systems. With few adjustable parameters, the NRTL-DVIS model represented the tested systems with good accuracy. With few exceptions the calculated total deviation (AARD) was within 3.5%. The NRTL-DVIS model shows better accuracy than other models proposed in the literature.
Diego D.D. Pinto; Hallvard F. Svendsen. An excess Gibbs free energy based model to calculate viscosity of multicomponent liquid mixtures. International Journal of Greenhouse Gas Control 2015, 42, 494 -501.
AMA StyleDiego D.D. Pinto, Hallvard F. Svendsen. An excess Gibbs free energy based model to calculate viscosity of multicomponent liquid mixtures. International Journal of Greenhouse Gas Control. 2015; 42 ():494-501.
Chicago/Turabian StyleDiego D.D. Pinto; Hallvard F. Svendsen. 2015. "An excess Gibbs free energy based model to calculate viscosity of multicomponent liquid mixtures." International Journal of Greenhouse Gas Control 42, no. : 494-501.
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 StyleDiego 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 StyleDiego 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.
A blend of a tertiary amine (DEEA) and a diamine (MAPA) was studied in a screening apparatus for preliminary absorption tests. Two immiscible liquid phases were formed upon CO2 loading and the system was shown to have large capacity for CO2. The two phases were analyzed individually for both amines and CO2. MAPA and water were found concentrated in the heavy CO2 rich phase whereas the CO2 lean phase contained mainly of DEEA. Volumetric phase ratio was measured as function of CO2 loading and together with the individual phase compositions this forms part of a basis for an equilibrium model. The CO2 rich phase was heated to desorption temperatures and shown to regenerate CO2 at higher pressures than normally used for 30 wt.% MEA. The data enabled understanding the system behavior as MAPA is first loaded in the heavy phase and subsequently DEEA reacts with CO2 and dissolves. The data show that the system has potential for significant reduction in regeneration heat through high cyclic capacity, very high CO2 stripping pressures, and for operating where the heat of reaction lies between primary and tertiary amines. The tests also give good estimates for the absorption rate at higher loadings.© 2014 Elsevier Ltd. All rights reserved. This is the authors' accepted and refereed manuscript to the article. Locked until 2016-07-26
Diego D.D. Pinto; Syed A.H. Zaidy; Ardi Hartono; Hallvard F. Svendsen. Evaluation of a phase change solvent for CO 2 capture: Absorption and desorption tests. International Journal of Greenhouse Gas Control 2014, 28, 318 -327.
AMA StyleDiego D.D. Pinto, Syed A.H. Zaidy, Ardi Hartono, Hallvard F. Svendsen. Evaluation of a phase change solvent for CO 2 capture: Absorption and desorption tests. International Journal of Greenhouse Gas Control. 2014; 28 ():318-327.
Chicago/Turabian StyleDiego D.D. Pinto; Syed A.H. Zaidy; Ardi Hartono; Hallvard F. Svendsen. 2014. "Evaluation of a phase change solvent for CO 2 capture: Absorption and desorption tests." International Journal of Greenhouse Gas Control 28, no. : 318-327.
Diego D.D. Pinto; Juliana Monteiro; Birgit Johnsen; Hallvard F. Svendsen; Hanna Katariina Knuutila. Density measurements and modelling of loaded and unloaded aqueous solutions of MDEA (N-methyldiethanolamine), DMEA (N,N-dimethylethanolamine), DEEA (diethylethanolamine) and MAPA (N-methyl-1,3-diaminopropane). International Journal of Greenhouse Gas Control 2014, 25, 173 -185.
AMA StyleDiego D.D. Pinto, Juliana Monteiro, Birgit Johnsen, Hallvard F. Svendsen, Hanna Katariina Knuutila. Density measurements and modelling of loaded and unloaded aqueous solutions of MDEA (N-methyldiethanolamine), DMEA (N,N-dimethylethanolamine), DEEA (diethylethanolamine) and MAPA (N-methyl-1,3-diaminopropane). International Journal of Greenhouse Gas Control. 2014; 25 ():173-185.
Chicago/Turabian StyleDiego D.D. Pinto; Juliana Monteiro; Birgit Johnsen; Hallvard F. Svendsen; Hanna Katariina Knuutila. 2014. "Density measurements and modelling of loaded and unloaded aqueous solutions of MDEA (N-methyldiethanolamine), DMEA (N,N-dimethylethanolamine), DEEA (diethylethanolamine) and MAPA (N-methyl-1,3-diaminopropane)." International Journal of Greenhouse Gas Control 25, no. : 173-185.
Considerable amount of work had been recently done researching the degradation of solvents for CO2 post combustion capture, especially for the benchmark solvent MEA. The degradation of the solvent can cause plant corrosion and losses in the process performance since the solvent might loses its capacity to absorb CO2. Thus, a better understanding of this phenomena is important for the overall process performance. Oxidative degradation is likely to occur at absorber conditions due to the presence of oxygen in the flue gas. Differently from the thermal degradation, the oxidative degradation is not well understood. This work presents a preliminary attempt to rigorously model the degradation of solvents for CO2 capture. Experimental data available in the literature were used to regress some of the model parameters. Several assumptions had to be made due to the lack of knowledge. The model, however, does a reasonable job of representing the dynamic trends of the oxidative degradation in the MEA system. This model is still under further development and new components, experiments and reactions are being implemented in the model
Diego D.D. Pinto; Thea W. Brodtkorb; Solrun J. Vevelstad; Hanna Knuutila; Hallvard F. Svendsen. Modeling of Oxidative MEA Degradation. Energy Procedia 2014, 63, 940 -950.
AMA StyleDiego D.D. Pinto, Thea W. Brodtkorb, Solrun J. Vevelstad, Hanna Knuutila, Hallvard F. Svendsen. Modeling of Oxidative MEA Degradation. Energy Procedia. 2014; 63 ():940-950.
Chicago/Turabian StyleDiego D.D. Pinto; Thea W. Brodtkorb; Solrun J. Vevelstad; Hanna Knuutila; Hallvard F. Svendsen. 2014. "Modeling of Oxidative MEA Degradation." Energy Procedia 63, no. : 940-950.
Juliana G.M.-S. Monteiro; Diego D.D. Pinto; Syed A.H. Zaidy; Ardi Hartono; Hallvard F. Svendsen. VLE data and modelling of aqueous N,N-diethylethanolamine (DEEA) solutions. International Journal of Greenhouse Gas Control 2013, 19, 432 -440.
AMA StyleJuliana G.M.-S. Monteiro, Diego D.D. Pinto, Syed A.H. Zaidy, Ardi Hartono, Hallvard F. Svendsen. VLE data and modelling of aqueous N,N-diethylethanolamine (DEEA) solutions. International Journal of Greenhouse Gas Control. 2013; 19 ():432-440.
Chicago/Turabian StyleJuliana G.M.-S. Monteiro; Diego D.D. Pinto; Syed A.H. Zaidy; Ardi Hartono; Hallvard F. Svendsen. 2013. "VLE data and modelling of aqueous N,N-diethylethanolamine (DEEA) solutions." International Journal of Greenhouse Gas Control 19, no. : 432-440.
The kinetics of CO2 reacting monoethanolamine (MEA) and 3-(methylamino)propylamine (MAPA) solutions are studied by conducting absorption rate experiments in two different apparatuses: a wetted wall column and a string of discs column. It is shown that the apparatuses give comparable results. The results are modeled using the direct kinetic mechanism with activity-based rate expressions, and good representation is obtained.
J.G.M.-S. Monteiro; D.D.D. Pinto; X. Luo; H. Knuutila; S. Hussain; E. Mba; A. Hartono; H.F. Svendsen. Activity-based Kinetics of the Reaction of Carbon Dioxide with Aqueous Amine Systems. Case Studies: MAPA and MEA. Energy Procedia 2013, 37, 1888 -1896.
AMA StyleJ.G.M.-S. Monteiro, D.D.D. Pinto, X. Luo, H. Knuutila, S. Hussain, E. Mba, A. Hartono, H.F. Svendsen. Activity-based Kinetics of the Reaction of Carbon Dioxide with Aqueous Amine Systems. Case Studies: MAPA and MEA. Energy Procedia. 2013; 37 ():1888-1896.
Chicago/Turabian StyleJ.G.M.-S. Monteiro; D.D.D. Pinto; X. Luo; H. Knuutila; S. Hussain; E. Mba; A. Hartono; H.F. Svendsen. 2013. "Activity-based Kinetics of the Reaction of Carbon Dioxide with Aqueous Amine Systems. Case Studies: MAPA and MEA." Energy Procedia 37, no. : 1888-1896.
In this work the potential of a novel post-combustion CO2 capture process is analysed with respect to the integrated overall process. As solvent a blend of two amines (DEEA/MAPA) which forms two liquid phases under CO2 loading is used. The two phases have distinct physical characteristics. Only the heavy phase, rich in CO2 loading, is led to the desorber. The novel solvent combination promises very low energy consumption compared to a 30 wt.-% MEA solution. The efficiency penalty, taking into account the integrated overall process, is very low too. Furthermore, different integration configurations in the overall process are investigated to show the effect in greenfield and retrofit power plant cases.
Ulrich Liebenthal; Diego Pinto; Juliana Monteiro; Hallvard F. Svendsen; Alfons Kather. Overall Process Analysis and Optimisation for CO2 Capture from Coal Fired Power Plants based on Phase Change Solvents Forming Two Liquid Phases. Energy Procedia 2013, 37, 1844 -1854.
AMA StyleUlrich Liebenthal, Diego Pinto, Juliana Monteiro, Hallvard F. Svendsen, Alfons Kather. Overall Process Analysis and Optimisation for CO2 Capture from Coal Fired Power Plants based on Phase Change Solvents Forming Two Liquid Phases. Energy Procedia. 2013; 37 ():1844-1854.
Chicago/Turabian StyleUlrich Liebenthal; Diego Pinto; Juliana Monteiro; Hallvard F. Svendsen; Alfons Kather. 2013. "Overall Process Analysis and Optimisation for CO2 Capture from Coal Fired Power Plants based on Phase Change Solvents Forming Two Liquid Phases." Energy Procedia 37, no. : 1844-1854.
Diego D.D. Pinto; Juliana G. M.-S. Monteiro; Anita Bersås; Tore Haug-Warberg; Hallvard F. Svendsen. eNRTL Parameter Fitting Procedure for Blended Amine Systems: MDEA-PZ Case Study. Energy Procedia 2013, 37, 1613 -1620.
AMA StyleDiego D.D. Pinto, Juliana G. M.-S. Monteiro, Anita Bersås, Tore Haug-Warberg, Hallvard F. Svendsen. eNRTL Parameter Fitting Procedure for Blended Amine Systems: MDEA-PZ Case Study. Energy Procedia. 2013; 37 ():1613-1620.
Chicago/Turabian StyleDiego D.D. Pinto; Juliana G. M.-S. Monteiro; Anita Bersås; Tore Haug-Warberg; Hallvard F. Svendsen. 2013. "eNRTL Parameter Fitting Procedure for Blended Amine Systems: MDEA-PZ Case Study." Energy Procedia 37, no. : 1613-1620.
It is well known that every investment carries a risk associated, and depending on the type of investment, it can be very risky; for instance, securities. However, Markowitz proposed a methodology to minimize the risk of a portfolio through securities diversification. The selection of the securities is a choice of the investor, who counts with several technical analyzes to estimate investment’s returns and risks. This paper presents an autoregressive exogenous (ARX) predictor model to provide the risk and return of some Brazilian securities – negotiated at the Brazilian stock market, BOVESPA – to select the best portfolio, herein understood as the one with minimum expected risk. The ARX predictor succeeded in predicting expected returns and risks of the securities, which resulted in an effective portfolio. Additionally the Markowitz theory was confirmed, showing that diversification reduces the risk of a portfolio.
D.D.D. Pinto; J.G.M.S. Monteiro; E.H. Nakao. An approach to portfolio selection using an ARX predictor for securities’ risk and return. Expert Systems with Applications 2011, 38, 15009 -15013.
AMA StyleD.D.D. Pinto, J.G.M.S. Monteiro, E.H. Nakao. An approach to portfolio selection using an ARX predictor for securities’ risk and return. Expert Systems with Applications. 2011; 38 (12):15009-15013.
Chicago/Turabian StyleD.D.D. Pinto; J.G.M.S. Monteiro; E.H. Nakao. 2011. "An approach to portfolio selection using an ARX predictor for securities’ risk and return." Expert Systems with Applications 38, no. 12: 15009-15013.