TY - JOUR
T1 - CO2 sorbents for a sorption-enhanced water-gas-shift process in IGCC plants
T2 - A thermodynamic analysis and process simulation study
AU - Lu, Hong
AU - Lu, Yongqi
AU - Rostam-Abadi, Massoud
N1 - Funding Information:
This project was supported by the U.S. Department of Energy/National Energy Technology Laboratory through Cooperative Agreement No. DE-FE-0000465 and by the Illinois Department of Commerce and Economic Opportunity (IDCEO) through the Office of Coal Development (OCD) and the Illinois Clean Coal Institute (ICCI) under Contract No. 10/US-2 and DEV11-1. The authors thank Dr. Jonathon Goodwin for his review of the manuscript and technical inputs. Publication of this paper was authorized by the Director of the Illinois State Geological Survey at the University of Illinois at Urbana-Champaign.
PY - 2013/5/30
Y1 - 2013/5/30
N2 - A sorption-enhanced water-gas-shift reaction process (SEWGS) combines the WGS reaction and CO2 removal into a single process step in an integrated gasification combined cycle (IGCC) power plant. In the SEWGS, a solid sorbent is employed to capture the CO2 generated by the WGS reaction. A key technical issue for the SEWGS is to identify and develop sorbents that can capture CO2 under high pressure and high temperature syngas conditions and minimize or even eliminate the need for WGS catalysts. We present the results from a thermodynamic analysis and process simulation study that aimed to identify sorbents and optimal temperature windows to maximize the thermal efficiency of an IGCC + SEWGS plant. The results from the thermodynamic analysis identified two metal oxides, one silicate, three zirconates, and one titanate sorbents that are suitable for the SEWGS application. The results from the process simulation study revealed that the overall thermal efficiency of a 1187 MWth (thermal input) IGCC + SEWGS plant gasifying an Illinois coal, and using the seven sorbents selected from the thermodynamic analysis, was between 0.5 and 2.4 percentage points greater than that of a reference IGCC + Selexol plant.
AB - A sorption-enhanced water-gas-shift reaction process (SEWGS) combines the WGS reaction and CO2 removal into a single process step in an integrated gasification combined cycle (IGCC) power plant. In the SEWGS, a solid sorbent is employed to capture the CO2 generated by the WGS reaction. A key technical issue for the SEWGS is to identify and develop sorbents that can capture CO2 under high pressure and high temperature syngas conditions and minimize or even eliminate the need for WGS catalysts. We present the results from a thermodynamic analysis and process simulation study that aimed to identify sorbents and optimal temperature windows to maximize the thermal efficiency of an IGCC + SEWGS plant. The results from the thermodynamic analysis identified two metal oxides, one silicate, three zirconates, and one titanate sorbents that are suitable for the SEWGS application. The results from the process simulation study revealed that the overall thermal efficiency of a 1187 MWth (thermal input) IGCC + SEWGS plant gasifying an Illinois coal, and using the seven sorbents selected from the thermodynamic analysis, was between 0.5 and 2.4 percentage points greater than that of a reference IGCC + Selexol plant.
KW - Adsorption
KW - CO
KW - Process simulation
KW - SEWGS
KW - Thermodynamics
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U2 - 10.1016/j.ijhydene.2013.03.067
DO - 10.1016/j.ijhydene.2013.03.067
M3 - Article
AN - SCOPUS:84877705776
SN - 0360-3199
VL - 38
SP - 6663
EP - 6672
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 16
ER -