Calcium-looping reforming of methane realizes in situ CO2 utilization with improved energy efficiency

Sicong Tian*, Feng Yan, Zuotai Zhang, Jianguo Jiang

*Corresponding author for this work

Research output: Contribution to journalArticle

21 Citations (Scopus)
4 Downloads (Pure)

Abstract

Closing the anthropogenic carbon cycle is one important strategy to combat climate change, and requires the chemistry to effectively combine CO2 capture with its conversion. Here, we propose a novel in situ CO2 utilization concept, calcium-looping reforming of methane, to realize the capture and conversion of CO2 in one integrated chemical process. This process couples the calcium-looping CO2 capture and the CH4 dry reforming reactions in the CaO-Ni bifunctional sorbent-catalyst, where the CO2 captured by CaO is reduced in situ by CH4 to CO, a reaction catalyzed by catalyzed by the adjacent metallic Ni. The process coupling scheme exhibits excellent decarbonation kinetics by exploiting Le Chatelier's principle to shift reaction equilibrium through continuous conversion of CO2, and results in an energy consumption 22% lower than that of conventional CH4 dry reforming for CO2 utilization. The proposed CO2 utilization concept offers a promising option to recycle carbon directly at large CO2 stationary sources in an energy-efficient manner.
Original languageEnglish
Article numbereaav5077
Pages (from-to)1-9
Number of pages9
JournalScience Advances
Volume5
Issue number4
DOIs
Publication statusPublished - 3 Apr 2019

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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