Sulfidation-regeneration cycles of ZnO- and CaO-containing sorbents
Article Abstract:
Sulfidation-regeneration experiments were conducted to examine the hydrogen sulfide-removal performance of sorbents derived from the impregnation of the metal oxides zinc oxide (ZnO) and calcium oxide (CaO) on inert porous carriers. The regeneration process for ZnO sorbents was different from that used for CaO sorbents. Sorbents made from impregnating metal oxide on magnesia showed better desulfurization capacity than those made with impregnation on alumina. CaO sorbent surface area and pore volume increased with methanol treatment. The physical properties of the sorbents did not change at various stages of sulfidation-regeneration.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Novel supported sorbent for hot gas desulfurization
Article Abstract:
Morgantown Energy Technology Center, West Virginia has developed a method of removing hydrogen sulfide from coal gas. Hydrogen sulfide corrodes machinery and contributes to acid rain. The research focused on the need to develop a cost-effective, durable and high-temperature resistant sorbent. A supported sorbent of copper oxide and manganese oxide on SP-115 zeolite reduced coal gas hydrogen sulfide from 2000 to 200 ppmv at 850 degrees centigrade.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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Reduction of thermal coals environmental impact by nitric precombustion desulfurization
Article Abstract:
Nitric acid is a somewhat useful desulferization agent when used on coal. The acid works as an oxidizing reagent, and it eliminates almost all of the sulfate and pyritic sulfur contained in coal. However, the treatment does not appear to affect the desulferization of organic sulfur. The nitric acid appeared to be the most effective when the temperature of the coal was 90 degrees Celsius.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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