Regeneration of Sulfated Dolomite and Limestone by Reductive Decomposition
作者:
A. Ersoy-Mericboyu, N. Karatepe, S. Kucukbayrak, S. Kafa, G. Gursoy,
期刊:
Energy Sources
(Taylor Available online 1999)
卷期:
Volume 21,
issue 7
页码: 589-593
ISSN:0090-8312
年代: 1999
DOI:10.1080/00908319950014533
出版商: Informa UK Ltd
关键词: Limestone;Dolomite;Sulfation;Regeneration
数据来源: Taylor
摘要:
Regeneration properties of sulfated dolomite and limestone samples were investi gated. Natural stones were first fully calcined at 1223 K in a gaseous atmosphere consisting of CO215 vol.% and dry air 85 vol.%; second, sulfation of the calcines was achieved by reacting them with a gaseous mixture consisting of CO215 vol.%, SO20.35 vol.%, and a balance of dry air at 1223 K; last, sulfated calcines were regenerated at 1373 K by a reductive decomposition process. During regeneration a 3:1 volumetric ratio of CO2/CO was maintained in the reducing gaseous atmosphere to minimize CaS formation. It has been found that for the five sulfation generation cycles the reactivity of the limestone and dolomite samples remained at acceptable levels. Since the repeated sulfation-regeneration steps caused an important change on the crystal lattice, as compared to the fresh stones, sorbent reactivity was also changed.
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