Hydrodehalogenation process using a catalyst containing nickel
AssigneesAir Liquide Process & Construction, Inc., Haldor Topeos Inc.
InventorsBhadra S. Grover, Henrik W. Rasmussen
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Abstract
A gas stream containing at least about 90% (vol.) hydrogen and at least one halogen-containing compound is contacted with a nickel hydrogenation catalyst. When the gas stream contacts the hydrogenation catalyst substantially all halogen-containing compounds are dehalogenated.
Claims26
A process for treating a gas stream having at least about 90 volume percent of H2, based on the total volume or all constituents comprising said gas stream, at least one halogen-containing compound and a total concentration of S-containing compounds less than about 2 ppm by volume, based on a mono-sulfur compound equivalent, said process comprising:
- (a) contacting said gas stream with a nickel catalyst composition at a temperature in a range from about 475° F. to about 850° F. (from about 2460° C. to about 454° C.), wherein said halogen-containing compound contacts said nickel catalyst composition so that a substantial portion of said halogen containing compound is reduced, said catalyst composition comprising a source for nickel in a zero oxidation state, Ni0, selected from the group consisting of
- (i) at least about 5 weight percent Ni0,
- (ii) a Ni0 precursor having Ni+n, where 1≦n≦4, that can produce at least about 5 weight percent Ni0 under substantially reducing conditions, and
- (iii) combinations thereof,
- said Ni0 weight percent being measured as a percentage of the total weight of all constituents comprising said nickel catalyst composition;
- and
- (b) producing a nickel catalyst-treated gas stream, wherein substantially all halogen-containing compounds are de-halogenated.
Dependencies are inferred from the claim text.