De-SO sub x catalyst; The role of iron in iron mixed solid solutions spinels, MgO ter dot MgAl sub 2 minus x Fe sub x O sub 4

Journal Article · Fri May 01 04:00:00 EDT 1992 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00005a002· OSTI ID:7281859

Yoo, J S; Bhattacharyya, A A; Radlowski, C A ^[1]; Karch, J A ^[2]

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1. Amoco Research Center, Amoco Chemical Co., Naperville, IL (US)
2. UOP, Des Plaines, IL (US)

This paper discusses the iron mixed solid solution spinels, MgO {center dot} MgAl{sub 2{minus}x}Fe{sub x}O{sub 4}, prepared by the coprecipitation method, and the role of iron in these spinels examined for the de-SO{sub x} chemistry. The iron in the mixed spinels exhibited a dual function, namely, the catalytic oxidation of SO{sub 2} to SO{sub 3} and the dramatic lowering of the sulfate reduction temperature. In short, the iron mixed solid solution spinels performed much better as a de-SO{sub x} catalyst than their single solid solution counterpart without iron, Ce/MgO {center dot} MgAl{sub 2}O{sub 4}. The fractional substitution of the Al atom in the spinel structure (x {le} 0.4) resulted in overcoming a drawback of sulfur accumulation inherent in the solid solution spinel. Sulfur tends to build up rather quickly in the de-SO{sub x} cycle test with the solid solution spinel catalyst without iron. The iron mixed solid solution spinels impregnated with cerium, Ce/MgO {center dot} MgAl{sub 2{minus}x}Fe{sub x}O{sub 4}, displayed an even better de-SO{sub x} function and an excellent steam stability as well.

• OSTI ID: 7281859
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 31:5; ISSN IECRE; ISSN 0888-5885
• Country of Publication: United States
• Language: English

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