Catalyst for the reduction of sulfur dioxide to elemental sulfur
AssigneeThe Regents of the University of California
InventorsYun Jin, Qiquan Yu, Shih-Ger Chang
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Abstract
The inventive catalysts allow for the reduction of sulfur dioxide to elemental sulfur in smokestack scrubber environments. The catalysts have a very high sulfur yield of over 90% and space velocity of 10,000 h.sup.-1. They also have the capacity to convert waste gases generated during the initial conversion into elemental sulfur. The catalysts have inexpensive components, and are inexpensive to produce. The net impact of the invention is to make this technology practically available to industrial applications.
Claims18
A catalyst for the conversion of sulfur dioxide to elemental sulfur comprising,
- a) Iron oxide,
- b) Co or Nickel oxide either separately or as a mixture,
- c) a component selected from the group consisting of the oxides of Mo, Mn, Se, Cu, Zn, and Cr, or combination thereof, and
- d) a carrier, the composition of said catalyst being represented by the formula:
- Fe.sub.a Co.sub.b Ni.sub.c Cr.sub.d Mo.sub.e Mn.sub.f Se.sub.g Cu.sub.h Zn.sub.i O.sub.x wherein:
- a,b,c,d,e, and f are independently ranged between 0 and 30,
- g and h are between 0 and 10,
- i is between 0 and 5, and
- x is determined by the charge balance of the catalysts,
- and said catalyst produces a sulfur yield of at least 90% when using a H.sub.2 -CO mixture as the reducing agent.
Dependencies are inferred from the claim text.