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 00:00:00 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]

---

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), Vol. 31:5; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
FLUE GAS
DESULFURIZATION
SOLID SOLUTIONS
CERIUM ADDITIONS
COPRECIPITATION
SPINELS
SULFUR DIOXIDE
AIR POLLUTION CONTROL
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
FOSSIL FUELS
IRON OXIDES
ALLOYS
CERIUM ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
DISPERSIONS
ENERGY SOURCES
FUELS
GASEOUS WASTES
IRON COMPOUNDS
KINETICS
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
PRECIPITATION
PYROLYSIS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
REACTION KINETICS
SEPARATION PROCESSES
SOLUTIONS
SULFUR COMPOUNDS
SULFUR OXIDES
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
020400 - Petroleum- Processing
400201 - Chemical & Physicochemical Properties
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)