One step methane production based on catalytic pressurized calcium looping gasification with in-situ CO2 capture and self-sustained heat supply

Zhou，Xing1,2; Yang，Xin3; Zheng，Jie4; Li，Junguo5; Li，Haibin7; Fang，Yitian2,6; Yu，Zhongliang2,4

2021-12-01

10.1016/j.joei.2021.10.002

JOURNAL OF THE ENERGY INSTITUTE   影响因子和分区

1743-9671

1746-0220

Catalytic steam hydrogasification of coal is a direct method for methane production. Calcium looping concept is usually used in coal gasification process for in-situ carbon dioxide removal and heat supply. In this paper, a new process combining catalytic steam hydrogasification and calcium looping was proposed and investigated using a self designed instantaneously feeding reactor under high-temperature and pressurized conditions. The effects of operation conditions (including hydrogen concentration with a range of 0–50 vol%, gasification pressure with a range of 0.1–3.5 MPa, gasification temperature with a range of 700–800 °C, and gasification-calcination cycle number up to six) on the performance of the new process have been studied. The results show that: (i) increasing H concentration is beneficial to methane products; (ii) high temperature and low pressure are not conducive to methane production and carbon dioxide capture as well as the self-sustained heat supply in gasifier; (iii) the methane content and carbon conversion can be maintained at 30–40 vol% and 75–80% for the durability tests. According to the performance of gas products, 750 °C 3.5 MPa and Ca/C = 0.5 are suggested for the new process. In addition, the gasification reactivity can be affected by the Ca–K-Char interaction as indicated by the XRD, FT-IR and SEM-EDX analysis.

Autothermal gasification Calcium looping Methane production Steam hydrogasification

EI ; SCI

英语

其他

WOS:000712078700001

20214311046968

Calcium ; Carbon dioxide ; Methane

Alkaline Earth Metals:549.2 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

ENGINEERING

2-s2.0-85117262026

Scopus

1.College of Engineering,Hebei Normal University,Shijiazhuang,050024,China
2.State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan,030001,China
3.Department of Engineering Science,University of Oxford,Oxford,OX2 0ES,United Kingdom
4.School of Chemistry and Environmental Science,Shangrao Normal University,Shangrao,334001,China
5.Academy for Advanced Interdisciplinary Studies and Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
6.Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian,116023,China
7.Key Laboratory of Renewable Energy,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou,510640,China

Zhou，Xing,Yang，Xin,Zheng，Jie,et al. One step methane production based on catalytic pressurized calcium looping gasification with in-situ CO2 capture and self-sustained heat supply[J]. JOURNAL OF THE ENERGY INSTITUTE,2021,99:256-265.

Zhou，Xing.,Yang，Xin.,Zheng，Jie.,Li，Junguo.,Li，Haibin.,...&Yu，Zhongliang.(2021).One step methane production based on catalytic pressurized calcium looping gasification with in-situ CO2 capture and self-sustained heat supply.JOURNAL OF THE ENERGY INSTITUTE,99,256-265.

Zhou，Xing,et al."One step methane production based on catalytic pressurized calcium looping gasification with in-situ CO2 capture and self-sustained heat supply".JOURNAL OF THE ENERGY INSTITUTE 99(2021):256-265.