Optimisation of the connection of membrane CCS installation with a supercritical coal-fired power plant

In this paper, the methods of the integration of a supercritical coal-fired power plant with membrane CCS installation are shown. In addition to membrane modules, the CCS installation also consists of two vacuum pumps and two CO2 compressors. In this paper, the relationship between the auxiliary power required to drive these machines and the recoverable amount of heat is shown. This relationship is the reason for the integration of the supercritical coal unit with the CCS installation, which is used for cooling compressed CO2 in the CCS installation by use of condensate (or feed water) from the supercritical coal unit cycle. This cooling process causes both a reduction of the auxiliary power required to drive the compressors and vacuum pumps and increase of power ratio of a steam turbine. In this paper, the optimisation method for minimising the decrease of overall efficiency of the power plant connected with its integration with CCS installation is shown. This results in choosing the optimal pressure ratios in the applied compressors and vacuum pumps under the condition of sufficient heat transmission to the steam turbine cycle. For investigated units, the cost of CO2 emission avoidance and the break-even price of electricity were also calculated.

[1]  Janusz Kotowicz,et al.  The influence of membrane CO2 separation on the efficiency of a coal-fired power plant , 2010 .

[2]  Michael Modigell,et al.  MEM-BRAIN gas separation membranes for zero-emission fossil power plants , 2009 .

[3]  Wojciech M. Budzianowski,et al.  Engineering benefits of mass recirculation in novel energy technologies with CO2 capture , 2010 .

[4]  Mir-Akbar Hessami,et al.  A study of methods of carbon dioxide capture and sequestration: the sustainability of a photosynthetic bioreactor approach , 2004 .

[5]  Zbigniew Michalewicz,et al.  Genetic Algorithms + Data Structures = Evolution Programs , 1996, Springer Berlin Heidelberg.

[6]  Diana N. Tran,et al.  Ethylenediamine-modified SBA-15 as Regenerable CO2 Sorbent , 2005 .

[7]  H. Herzog.  Peer Reviewed: What Future for Carbon Capture and Sequestration? , 2001 .

[8]  Alfons Kather,et al.  Optimised integration of post-combustion CO2 capture process in greenfield power plants , 2010 .

[9]  May-Britt Hägg,et al.  CO2 Capture from Natural Gas Fired Power Plants by Using Membrane Technology , 2005 .

[10]  William J. Koros,et al.  Membrane-based gas separation , 1993 .

[11]  May-Britt Hägg,et al.  Techno-economic evaluation of a PVAm CO2-selective membrane in an IGCC power plant with CO2 capture , 2008 .

[12]  Janusz Kotowicz,et al.  The Thermodynamic And Economic Analysis Of The Supercritical Coal Fired Power Plant With Ccs Instalation , 2009 .

[13]  Reinhard Menzer,et al.  Concepts and investment cost analyses of multi-stage membrane systems used in post-combustion processes , 2009 .

[14]  Li Zhao,et al.  Multi-stage gas separation membrane processes used in post-combustion capture: Energetic and economic analyses , 2010 .

[15]  Clem E. Powell,et al.  Polymeric CO2/N2 gas separation membranes for the capture of carbon dioxide from power plant flue gases , 2006 .

[16]  M. Mølnvik,et al.  Dynamis CO2 quality recommendations , 2008 .

[17]  Giovanni Ferrara,et al.  Thermoeconomic optimization method as design tool in gas–steam combined plant realization , 2001 .

[18]  Łukasz Bartela,et al.  The influence of economic parameters on the optimal values of the design variables of a combined cycle plant , 2010 .

[19]  David E. Goldberg,et al.  Genetic Algorithms in Search Optimization and Machine Learning , 1988 .

[20]  May-Britt Hägg,et al.  A feasibility study of CO2 capture from flue gas by a facilitated transport membrane , 2010 .

[21]  Fabrice Foucher,et al.  Effects of O2 enrichment and CO2 dilution on laminar methane flames , 2013 .

[22]  Haiqing Lin,et al.  Power plant post-combustion carbon dioxide capture: An opportunity for membranes , 2010 .