Energy conversion analysis of hydrogen and electricity co-production coupled with in situ CO2 capture

CO2 adsorption enhanced gasification process is a prospective technology to be used in hydrogen and power production with nearly zero CO2 emission. In this paper, a gasification kinetics steady state model is developed based on the chemical kinetics mechanism with the condition of fluidization. It is used to predict the parameters of gas phase and solid phase for a continuous flow reactor with steady state:The variation of distribution of components with gasification temperature and pressure are determined. Conceptual configurations of H-2 and power co-production system are designed with the integration of CO2 adsorption enhanced gasification process, H-2 separation unit, power generation unit and other auxiliary units. Mass and heat transfer between different parts are studied systematically by flow-sheet simulation and sensitivity analysis of parameters. According to the generalized exergy efficiency of the system, the influence of gasification temperature and pressure on the system performance is investigated and the optimum gasification temperature and pressure for system operation can be determined. (c) 2012 International Energy Initiative. Published by Elsevier Inc. All rights reserved.

[1]  Syuan-Hong Lin,et al.  Hydrogen production from coal by separating carbon dioxide during gasification , 2002 .

[2]  Yoshizo Suzuki,et al.  Hydrogen Production from Hydrocarbon by Integration of Water−Carbon Reaction and Carbon Dioxide Removal (HyPr−RING Method) , 2001 .

[3]  J. Mačák,et al.  Mathematical Model for the Gasification of Coal under Pressure , 1978 .

[4]  J. Grace,et al.  Equilibrium modeling of gasification: a free energy minimization approach and its application to a circulating fluidized bed coal gasifier , 2001 .

[5]  Hiroyuki Hatano,et al.  Continuous experiment regarding hydrogen production by coal/CaO reaction with steam (I) gas products , 2004 .

[6]  Andrew T. Harris,et al.  Hydrogen production from biomass coupled with carbon dioxide capture: The implications of thermodynamic equilibrium , 2007 .

[7]  Kirill V. Lobachyov,et al.  High efficiency coal-fired power plant of the future , 1997 .

[9]  A. P. Watkinson,et al.  A PREDICTION OF PERFORMANCE OF COMMERCIAL COAL GASIFIERS , 1991 .

[10]  D. Merrick.  Mathematical models of the thermal decomposition of coal: 1. The evolution of volatile matter , 1983 .

[11]  J. C. Abanades,et al.  In-Situ Capture of CO2 in a Fluidized Bed Combustor , 2003 .

[12]  H. Hofbauer,et al.  H2 rich syngas by selective CO2 removal from biomass gasification in a dual fluidized bed system — Process modelling approach , 2008 .

[13]  Zhihua Wang,et al.  Thermodynamic equilibrium analysis of hydrogen production by coal based on Coal/CaO/H2O gasification system , 2006 .

[14]  Hiroyuki Hatano,et al.  Process analysis for hydrogen production by reaction integrated novel gasification (HyPr-RING) , 2005 .

[15]  N. Amundson,et al.  Studies in char gasification-I A lumped model , 1979 .

[16]  A. Gómez-Barea,et al.  Modeling of biomass gasification in fluidized bed , 2010 .

[17]  Stephen Niksa,et al.  Coal conversion submodels for design applications at elevated pressures. Part II. Char gasification , 2004 .

[18]  Pier Ugo Foscolo,et al.  Thermodynamic limits and actual product yields and compositions in biomass gasification processes , 2006 .