Document Type
Article
Publication Date
2-6-2002
Journal or Book Title
Industrial & Engineering Chemistry Research
Volume
41
Issue
3
First Page
587
Last Page
597
DOI
10.1021/ie010445b
Abstract
A regenerable calcium-based sorbent was prepared by pelletizing either powdered limestone or calcium sulfate hemihydrate and then coating the pellets with an optimum mixture of powdered alumina and limestone. The pellets were subsequently calcined and treated at high temperature to produce pellets with a calcium oxide core surrounded by a strong, inert porous shell. The crushing strength of the core-in-shell pellets was directly proportional to the shell thickness. The performance characteristics of the sorbent were determined by employing a thermogravimetric analysis system to measure the rate of reaction of individual pellets with small concentrations of H2S at high temperature. The reaction was rapid and directly proportional to H2S concentration. The reaction rate was not affected greatly by the thickness of the pellet shell or by temperature in the range of 840−920 °C. However, the rate was more rapid for hemihydrate-based pellets than for limestone-based pellets. The hemihydrate-based pellets also had the advantage of withstanding repeated loading and regeneration without suffering a significant loss of reactivity, whereas the limestone-based pellets did suffer markedly.
Copyright Owner
American Chemical Society
Copyright Date
2002
Language
en
File Format
application/pdf
Recommended Citation
Akiti, T. T. Jr.; Constant, Kristen P.; Doraiswamy, L. K.; and Wheelock, Thomas D., "A Regenerable Calcium-Based Core-in-Shell Sorbent for Desulfurizing Hot Coal Gas" (2002). Materials Science and Engineering Publications. 84.
https://lib.dr.iastate.edu/mse_pubs/84
Comments
Reprinted with permission from Industrial & Engineering Chemistry Research 41 (2002): 587–597, doi:10.1021/ie010445b. Copyright 2002 American Chemical Society.