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Impact of SO 2 in the Presence of Steam on Carbonation and Sulfation of Calcium Sorbents
Author(s) -
PawlakKruczek H.,
Baranowski M.,
TkaczukSerafin M.
Publication year - 2013
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.201300070
Subject(s) - carbonation , sorption , sulfation , chemistry , calcination , carbonatation , chemical engineering , sulfur dioxide , inorganic chemistry , mineralogy , catalysis , adsorption , organic chemistry , biochemistry , engineering
The effect of the presence of steam and SO 2 on CO 2 sorption capacity during multicycle carbonation‐calcination tests on three limestone types from Germany, Greece, and Poland was studied. The behavior of carbonation conversion under realistic process atmospheres containing SO 2 and additionally steam as well as of sulfation under similar temperature conditions was investigated. The deactivation effect of SO 2 on CO 2 sorption capacity in two cases with and without steam was analyzed. The negative impact of the competitive sulfation reaction towards carbonation increased in the subsequent cycles for both cases, but to a less extent in the presence of steam. Sulfation conversion changed quite monotonically in the subsequent cycle in dry gas, whereas in the presence of steam sulfation conversion decreased slightly while carbonation conversion increased. It was found for the tested sorbents that carbonation conversion decreased to varying degrees in the presence of SO 2 . The Polish and Greek limestone showed the largest loss of sorption capacity in the presence of SO 2 . The quantitative influence of SO 2 on carbonation conversion in dry and wet gas was determined.