Simulation and parametric study of post combustion CO2 capture process using (AMP + PZ) blended solvent

Abstract In this work, a simulation study of CO2 capture process using aqueous blend of (AMP + PZ) solvents has been presented. CO2 capture from the flue gas stream of a coal fired power plant, using the absorption-regeneration process has been simulated using RadFrac-RateSep block in Aspen Plus® platform. Aqueous (AMP + PZ) solvents of 30–50 wt% total amine concentration have been considered for this simulation study. Thermodynamic and kinetic parameters of CO2 in aqueous (AMP + PZ) solvent taken from our previous work as well as from literature are used to simulate the flow sheet of CO2 capture process in Aspen Plus. The model results have been validated with the pilot plant results from literature on CO2 capture using aqueous AMP and (AMP + PZ) solvents. The model simulates the temperature profile and the rich and lean loadings of the absorber and regenerator. An optimum set of process conditions, e.g., amine concentration in the aqueous solvent, liquid-to-gas ratio in the absorber, absorber and regenerator height and lean and rich loading have been determined. The Aspen absorber–stripper flow sheet model has been used to study the effects of gas and liquid flow rates, temperature approach in the lean-rich heat exchanger on the extent of CO2 capture, CO2 purity and energy requirement. From this study it is observed, 90% of CO2 removal can be achieved with (18 wt% AMP + 17.5 wt% PZ) solvent for an absorber L/G of 2.9, 10 m of absorber packing height, and a regenerator energy requirement of 3700 kJ/kg CO2.

[1]  S. Bandyopadhyay,et al.  Solubility of carbon dioxide in aqueous solution of 2-amino-2-methyl-1-propanol and piperazine , 2011 .

[2]  Gary T. Rochelle,et al.  Energy performance of stripper configurations for CO2 capture by aqueous amines , 2006 .

[3]  Gary T. Rochelle,et al.  Thermal Degradation of Aqueous Piperazine for CO2 Capture. 1. Effect of Process Conditions and Comparison of Thermal Stability of CO2 Capture Amines , 2012 .

[4]  Norbert Asprion,et al.  Nonequilibrium rate-based simulation of reactive systems : Simulation model, heat transfer, and influence of film discretization , 2006 .

[5]  Olav Bolland,et al.  Comparison of solvents for post-combustion capture of CO2 by chemical absorption , 2009 .

[6]  Gary T. Rochelle,et al.  Carbon dioxide capture with concentrated, aqueous piperazine , 2009 .

[7]  H. Svendsen,et al.  Chemical stability and biodegradability of new solvents for CO2 capture , 2011 .

[8]  Jason Daniel Davis,et al.  Thermal degradation of aqueous amines used for carbon dioxide capture , 2009 .

[9]  Erling Halfdan Stenby,et al.  CO2 Capture from Coal Fired Power Plants , 2007 .

[10]  Hans Hasse,et al.  A short-cut method for assessing absorbents for post-combustion carbon dioxide capture , 2011 .

[11]  S. Bandyopadhyay,et al.  Absorption of carbon dioxide in piperazine activated concentrated aqueous 2-amino-2-methyl-1-propanol solvent , 2011 .

[12]  Gary T. Rochelle,et al.  Effects of the Temperature Bulge in CO2 Absorption from Flue Gas by Aqueous Monoethanolamine , 2008 .

[13]  Takuya Hirata,et al.  Current status of MHI’s CO2 recovery technology and optimization of CO2 recovery plant with a PC fired power plant , 2009 .

[14]  Anusha Kothandaraman,et al.  Carbon dioxide capture by chemical absorption : a solvent comparison study , 2010 .

[15]  Jerry Meldon,et al.  Advanced Post-Combustion CO 2 Capture , 2009 .

[16]  Meng-Hui Li,et al.  Heat Capacity of Aqueous Mixtures of Monoethanolamine with N-Methyldiethanolamine , 2001 .

[17]  Hallvard F. Svendsen,et al.  Comparative study of the heats of absorption of post-combustion CO2 absorbents , 2011 .

[18]  John Kenworthy.  Evaluation of process , 2013 .

[19]  James R. Fair,et al.  Mass transfer in gauze packings , 1985 .

[20]  Amar Nath Samanta,et al.  Experimental and theoretical investigation of solubility of carbon dioxide in concentrated aqueous solution of 2-amino-2-methyl-1-propanol and piperazine , 2012 .

[21]  H. Hasse,et al.  Pilot plant study of two new solvents for post combustion carbon dioxide capture by reactive absorption and comparison to monoethanolamine , 2011 .

[22]  Masaki Iijima,et al.  Development of energy saving technology for flue gas carbon dioxide recovery in power plant by chemical absorption method and steam system , 1997 .

[23]  G. Versteeg,et al.  CO2 capture from power plants. Part I: A parametric study of the technical performance based on monoethanolamine , 2007 .

[24]  L. Pearson,et al.  The kinetics of combination of carbon dioxide with hydroxide ions , 1956 .

[25]  S. Bandyopadhyay,et al.  Absorption of carbon dioxide into aqueous solutions of piperazine activated 2-amino-2-methyl-1-propanol , 2009 .

[26]  Yincheng Guo,et al.  Process simulations of large-scale CO2 capture in coal-fired power plants using aqueous ammonia solution , 2013 .

[27]  Gary T. Rochelle,et al.  Degradation of aqueous piperazine in carbon dioxide capture , 2010 .

[28]  Asit K. Saha,et al.  Kinetics of absorption of CO2 into aqueous solutions of 2-amino-2-methyl-1-propanol , 1995 .

[29]  Gary T. Rochelle,et al.  Absorption of carbon dioxide in aqueous piperazine/methyldiethanolamine , 2002 .

[30]  Jacob Nygaard Knudsen,et al.  Evaluation of process upgrades and novel solvents for the post combustion CO2 capture process in pilot-scale , 2011 .

[31]  Meihong Wang,et al.  Post-combustion CO2 capture with chemical absorption: A state-of-the-art review , 2011 .