Open AccessApplication of chemical looping air separation for MILD oxy‐combustion in the supercritical power plant with CO 2 capture
Author(s) -
Chen Shiyi,
Hu Jun,
Sun Zhao,
Xiang Wenguo
Publication year - 2018
Publication title -
energy science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 29
ISSN - 2050-0505
DOI - 10.1002/ese3.224
Subject(s) - chemical looping combustion , supercritical fluid , combustion , power station , air separation , chemistry , process engineering , oxygen , carbon capture and storage (timeline) , materials science , chemical engineering , thermodynamics , organic chemistry , engineering , ecology , climate change , biology , physics
Chemical looping air separation ( CLAS ) is a novel and promising technology for oxygen production. This paper presents the application of CLAS to the supercritical power plant for MILD oxy‐combustion. Compared with the reference conventional supercritical power plant, the power generation efficiency of the CLAS integrated MILD oxy‐combustion plant is only reduced by about ~1.37% points at the baseline case. CO 2 compression process imposes additional ~3.97% points efficiency penalty, which is inevitable to all of the CO 2 capture technologies. The net power efficiency of the CLAS integrated MILD oxy‐combustion plant is ~37.37%. Even though a higher reduction reactor temperature could boost the power efficiency and a higher oxidization reactor temperature reversely decreases the power efficiency, the influence of reactor temperature is marginal. The performance of CLAS integrated MILD oxy‐combustion plant is not sensitive to excess CO 2 and O 2 ratio. Different oxygen carriers have different suitable operating region, but possess similar power efficiency. The carbon capture rate of the CLAS integrated MILD oxy‐combustion plant is up to ~100%, resulting in a virtually carbon‐free fossil power plant.