Analysis and optimization of CO2 capture in an existing coal-fired power plant in China

Retrofitting existing power plants for CO2 capture poses numerous constraints. The layout of the original process and the structure of the existing equipment cause various special problems in the design process as well as influence system performance. In view of these, this paper carries out process simulations, characteristic analysis, and system integration of CO2 capture based on an existing typical coal-fired power plant in China with supercritical parameters. The main constraints encountered in decarburized retrofitting of the existing power plants using monoethanolamine solution are analyzed. In addition, several special system integration schemes for CO2 capture in an existing 600 MW power generation unit are put forward. The results reveals that, due to the constraints in the layout of the original process and the structure of the existing equipment, efficiency penalty of CO2 capture in an existing power plant will be as high as 13.73%-points, higher than a newly redesigned power plant by 3.70%-points. And through special system integrations, the efficiency of such retrofitting existing power plant can increase by 4.15%-points. The research of this paper may provide feasible technology solutions for the decarburized retrofitting of existing power plants and promote CCS (CO2 capture and storage) technologies into application.

[1]  Bin Huang,et al.  Industrial test and techno-economic analysis of CO2 capture in Huaneng Beijing coal-fired power station , 2010 .

[2]  Tong Seop Kim,et al.  An integrated power generation system combining solid oxide fuel cell and oxy-fuel combustion for high performance and CO2 capture , 2011 .

[3]  Irene Bolea,et al.  Integration of post-combustion capture and storage into a pulverized coal-fired power plant , 2010 .

[4]  Xu Shu.  Type Selection and Parameter Determination Method for Unit of Cogeneration Project , 2008 .

[5]  Jinping Li,et al.  Energy Consumption Analysis of a New Rural Green Building , 2012 .

[6]  Eric Croiset,et al.  Simulation of CO2 capture using MEA scrubbing: a flowsheet decomposition method , 2005 .

[7]  Zhang Yi-xing.  Cost study of heat supply and electricity supply of cogeneration project , 2004 .

[8]  Yingjie Li,et al.  CO2 capture performance of calcium-based sorbent doped with manganese salts during calcium looping cycle , 2012 .

[9]  Chakib Bouallou,et al.  CO2 capture from power stations running with natural gas (NGCC) and pulverized coal (PC): Assessment of a new chemical solvent based on aqueous solutions of N-methyldiethanolamine + triethylene tetramine , 2009 .

[10]  B. Metz.  IPCC special report on carbon dioxide capture and storage , 2005 .

[11]  Ling Li,et al.  Thermodynamic model of HP–IP leakage and IP turbine efficiency , 2011 .

[12]  Hanne M. Kvamsdal,et al.  Integrating a full carbon capture scheme onto a 450 MWe NGCC electric power generation hub for offshore operations: Presenting the Sevan GTW concept , 2009 .

[13]  Na Zhang,et al.  Analytical solutions and typical characteristics of part-load performances of single shaft gas turbine and its cogeneration , 2002 .

[14]  Shao Yingjuan,et al.  Predictions of the impurities in the CO2 stream of an oxy-coal combustion plant , 2010 .

[15]  Alfons Kather,et al.  Derivation of correlations to evaluate the impact of retrofitted post-combustion CO2 capture processes on steam power plant performance , 2011 .

[16]  Bolesław Zaporowski,et al.  Energy analysis of technological systems of natural gas fired combined heat-and-power plants , 2003 .

[17]  Eric Croiset,et al.  Techno-economic study of CO2 capture from an existing coal-fired power plant: MEA scrubbing vs. O2/CO2 recycle combustion , 2003 .

[18]  Jon Gibbins,et al.  Retrofitting CO2 capture ready fossil plants with post-combustion capture. Part 1: Requirements for supercritical pulverized coal plants using solvent-based flue gas scrubbing , 2009 .

[19]  R. Williams,et al.  Co-production of hydrogen, electricity and CO2 from coal with commercially ready technology. Part B: Economic analysis , 2005 .

[20]  A. Stodola.  Steam and gas turbines , 1927 .

[21]  C. Bouallou,et al.  Pre-combustion, post-combustion and oxy-combustion in thermal power plant for CO2 capture , 2010 .

[22]  Edward S Rubin,et al.  A technical, economic, and environmental assessment of amine-based CO2 capture technology for power plant greenhouse gas control. , 2002, Environmental science & technology.

[23]  Y. Nomoto,et al.  Study of steam, helium and supercritical CO2 turbine power generations in prototype fusion power reactor , 2008 .

[24]  R Pruschek,et al.  Comparison of CO2 removal systems for fossil-fuelled power plant processes , 1997 .

[25]  Yan Li,et al.  An innovative process for simultaneous removal of CO2 and SO2 from flue gas of a power plant by energy integration. , 2009 .

[26]  Ming Zhao,et al.  A review of techno-economic models for the retrofitting of conventional pulverised-coal power plants for post-combustion capture (PCC) of CO2 , 2013 .

[27]  G. Waghorn,et al.  Greenhouse gas emissions. , 2008 .

[28]  Ralph E.H. Sims,et al.  Carbon emission and mitigation cost comparisons between fossil fuel, nuclear and renewable energy resources for electricity generation , 2003 .

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

[30]  Björn Rolfsman,et al.  Combined heat-and-power plants and district heating in a deregulated electricity market , 2004 .

[31]  Jon Gibbins,et al.  Scope for reductions in the cost of CO2 capture using flue gas scrubbing with amine solvents , 2004 .

[32]  Hallvard F. Svendsen,et al.  CO2 capture from coal-fired power plants based on sodium carbonate slurry; a systems feasibility and sensitivity study , 2009 .

[33]  Giampaolo Manfrida,et al.  Comparative study of chemical absorbents in postcombustion CO2 capture , 2010 .

[34]  Hu Lin,et al.  A comprehensive techno‐economic analysis method for power generation systems with CO2 capture , 2010 .

[35]  Hans Hasse,et al.  Integration of a chemical process model in a power plant modelling tool for the simulation of an amine based CO2 scrubber , 2009 .

[36]  Jinyue Yan,et al.  Characterization of flue gas in oxy-coal combustion processes for CO2 capture , 2012 .

[37]  Yongping Yang,et al.  Integration and optimization study on the coal-fired power plant with CO2 capture using MEA , 2012 .

[38]  Panagiotis Grammelis,et al.  Partial O2-fired coal power plant with post-combustion CO2 capture: A retrofitting option for CO2 capture ready plants , 2009 .