Systematic study of aqueous monoethanolamine‐based CO2 capture process: model development and process improvement

In this paper, we present improvements to postcombustion capture (PCC) processes based on aqueous monoethanolamine (MEA). First, a rigorous, rate-based model of the carbon dioxide (CO2) capture process from flue gas by aqueous MEA was developed using Aspen Plus, and validated against results from the PCC pilot plant trials located at the coal-fired Tarong power station in Queensland, Australia. The model satisfactorily predicted the comprehensive experimental results from CO2 absorption and CO2 stripping process. The model was then employed to guide the systematic study of the MEA-based CO2 capture process for the reduction in regeneration energy penalty through parameter optimization and process modification. Important process parameters such as MEA concentration, lean CO2 loading, lean temperature, and stripper pressure were optimized. The process modifications were investigated, which included the absorber intercooling, rich-split, and stripper interheating processes. The minimum regeneration energy obtained from the combined parameter optimization and process modification was 3.1 MJ/kg CO2. This study suggests that the combination of a validated rate-based model and process simulation can be used as an effective tool to guide sophisticated process plant, equipment design and process improvement.

[1]  Finn Andrew Tobiesen,et al.  Experimental validation of a rigorous desorber model for CO2 post-combustion capture , 2008 .

[2]  Gary T. Rochelle,et al.  Amine Scrubbing for CO2 Capture , 2009, Science.

[3]  Paul Feron,et al.  Post-combustion capture of CO2 from coal-fired power plants in China and Australia: An experience based cost comparison , 2011 .

[4]  Costas Tsouris,et al.  Separation of CO2 from Flue Gas: A Review , 2005 .

[5]  N. Lior,et al.  The theory and practice of energy saving in the chemical industry: some methods for reducing thermodynamic irreversibility in chemical technology processes , 2003 .

[6]  Moses O. Tadé,et al.  Theoretical and experimental study of NH3 suppression by addition of Me(II) ions (Ni, Cu and Zn) in an ammonia-based CO2 capture process , 2014 .

[7]  Ying Zhang,et al.  Modeling CO2 Absorption and Desorption by Aqueous Monoethanolamine Solution with Aspen Rate-based Model☆ , 2013 .

[8]  L. I. Eide,et al.  Precombustion Decarbonisation Processes , 2005 .

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

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

[11]  Meihong Wang,et al.  Dynamic modelling of CO2 absorption for post combustion capture in coal-fired power plants , 2009 .

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

[13]  Finn Andrew Tobiesen,et al.  Experimental validation of a rigorous absorber model for CO2 postcombustion capture , 2007 .

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

[15]  L. Øi.  Aspen HYSYS Simulation of CO2 Removal by Amine Absorption from a Gas Based Power Plant , 2007 .

[16]  Stefano Freguia,et al.  Modeling of CO2 capture by aqueous monoethanolamine , 2003 .

[17]  Ashleigh Cousins,et al.  PRELIMINARY ANALYSIS OF PROCESS FLOW SHEET MODIFICATIONS FOR ENERGY EFFICIENT CO2 CAPTURE FROM FLUE GASES USING CHEMICAL ABSORPTION , 2011 .

[18]  Ying Zhang,et al.  Thermodynamic modeling for CO2 absorption in aqueous MEA solution with electrolyte NRTL model , 2011 .

[19]  Van Wagener,et al.  Stripper modeling for CO₂ removal using monoethanolamine and piperazine solvents , 2011 .

[20]  Hartmut Spliethoff,et al.  Assessment of oxy-fuel, pre- and post-combustion-based carbon capture for future IGCC plants , 2012 .

[21]  S. Asai,et al.  The kinetics of reactions of carbon dioxide with monoethanolamine, diethanolamine and triethanolamine by a rapid mixing method , 1977 .

[22]  Ashleigh Cousins,et al.  Model verification and evaluation of the rich‐split process modification at an Australian‐based post combustion CO 2 capture pilot plant , 2012 .

[23]  Georges Heyen,et al.  Modeling post-combustion CO2 capture with amine solvents , 2011 .

[24]  Gary T. Rochelle,et al.  Regeneration with Rich Bypass of Aqueous Piperazine and Monoethanolamine for CO2 Capture , 2014 .

[25]  Pascal Mougin,et al.  High throughput screening of CO2 solubility in aqueous monoamine solutions. , 2011, Environmental science & technology.

[26]  Hailong Li,et al.  Impurity impacts on the purification process in oxy-fuel combustion based CO2 capture and storage system , 2009 .

[27]  Magne Hillestad,et al.  Positive and Negative Effects on Energy Consumption by Inter–heating of Stripper in Co2 Capture Plant , 2012 .

[28]  David C. Miller,et al.  Comparisons of amine solvents for post-combustion CO2 capture: A multi-objective analysis approach , 2013 .

[29]  Jacob Nygaard Knudsen,et al.  Experience with CO2 capture from coal flue gas in pilot-scale: Testing of different amine solvents , 2009 .

[30]  Shujuan Wang,et al.  Process modeling of an advanced NH₃ abatement and recycling technology in the ammonia-based CO₂ capture process. , 2014, Environmental science & technology.

[31]  P. Feron,et al.  A survey of process flow sheet modifications for energy efficient CO2 capture from flue gases using chemical absorption , 2011 .

[32]  Magne Hillestad,et al.  Capital costs and energy considerations of different alternative stripper configurations for post combustion CO2 capture , 2011 .

[33]  Aaron Cottrell,et al.  Chemical characterization of MEA degradation in PCC pilot plants operating in Australia , 2013 .

[34]  Georges Heyen,et al.  Influence of process operating conditions on solvent thermal and oxidative degradation in post-combustion CO2 capture , 2015, Comput. Chem. Eng..

[35]  Moses O. Tadé,et al.  Technical and Energy Performance of an Advanced, Aqueous Ammonia-Based CO2 Capture Technology for a 500 MW Coal-Fired Power Station. , 2015, Environmental science & technology.

[36]  Hans Hasse,et al.  Post combustion CO2 capture by reactive absorption: Pilot plant description and results of systematic studies with MEA , 2012 .

[37]  Moses O. Tadé,et al.  Rate-based modelling of combined SO2 removal and NH3 recycling integrated with an aqueous NH3-based CO2 capture process , 2015 .

[38]  Graeme Puxty,et al.  Carbon dioxide postcombustion capture: a novel screening study of the carbon dioxide absorption performance of 76 amines. , 2009, Environmental science & technology.

[39]  Ennio Macchi,et al.  Economic assessment of novel amine based CO2 capture technologies integrated in power plants based on European Benchmarking Task Force methodology , 2015 .

[40]  Gary T. Rochelle,et al.  Energy performance of advanced stripper configurations , 2013 .

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

[42]  Chau-Chyun Chen,et al.  Thermodynamic Modeling of the NH3–CO2–H2O System with Electrolyte NRTL Model , 2011 .

[43]  Yaser Khojasteh Salkuyeh,et al.  Reduction of CO2 capture plant energy requirement by selecting a suitable solvent and analyzing the operating parameters , 2013 .

[44]  Gary T. Rochelle,et al.  Rate-Based Process Modeling Study of CO2 Capture with Aqueous Monoethanolamine Solution , 2009 .