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Natural Calcium‐Based Sorbents Doped with Sea Salt for Cyclic CO 2 Capture
Author(s) -
Xu Yongqing,
Luo Cong,
Zheng Ying,
Ding Haoran,
Zhou Dong,
Zhang Liqi
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500330
Subject(s) - carbonation , calcium looping , sorbent , calcination , raw material , calcium carbonate , chemical engineering , calcium , carbonatation , salt (chemistry) , sea salt , carbon dioxide , chemistry , adsorption , materials science , catalysis , organic chemistry , aerosol , engineering
The calcium‐looping process for post‐combustion carbon dioxide capture, an economically and technically feasible method suitable for large‐scale use, has recently gained much attention. However, the capture capacity of calcium‐based sorbents rapidly decreases after only a few cycles. Herein, calcium‐based sorbents with enhanced cyclic CO 2 ‐capture capacity have been derived from cheap, natural raw materials by using a simple impregnation method. Limestone and shells were used as the calcium‐based raw materials, with sea salt as dopant. Modified limestone had the highest CO 2 ‐capture capacity after multiple carbonation‐calcination cycles. Sea‐salt‐doped sorbent showed a relatively stable porous surface during cycles, which resulted in a higher CO 2 ‐capture capacity.