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Role of porosity loss in limiting SO 2 capture by calcium based sorbents
Author(s) -
Newton Gerald H.,
Chen Shih Lin,
Kramlich John C.
Publication year - 1989
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690350612
Subject(s) - porosity , calcium , limiting , sintering , chemistry , particle size , chemical engineering , sulfation , mineralogy , materials science , organic chemistry , biochemistry , mechanical engineering , engineering
Abstract The extent of high temperature (900‐1,300°C), short time (<1 s) SO 2 capture was found to be limited by temperature‐dependent losses in the porosity of calcium based sorbents. At 970°C these porosity losses were caused by CO 2 ‐activated sintering. Sulfation of the sorbents either prevented or reduced the extent of porosity losses. Differences in SO 2 capture between hydroxides from different commercial sources, and significantly lower levels of capture by calcium carbonates compared to hydroxides were attributed to differences in particle size and the degree of porosity loss.