Compositions – Gaseous compositions – Carbon-oxide and hydrogen containing
Reexamination Certificate
2006-04-07
2009-11-17
Langel, Wayne (Department: 1793)
Compositions
Gaseous compositions
Carbon-oxide and hydrogen containing
C048S1970FM, C423S244010, C423S244060, C423S648100, C423S650000, C423S651000, C423S655000, C502S055000
Reexamination Certificate
active
07618558
ABSTRACT:
A process for cleaning gases from a gasification unit comprising the steps of:gasifying a fuel to raw synthesis gas comprising carbon monoxide and steam in a gasification reactor in the presence of a calcium-containing compound and steamremoving halogen compounds from the raw synthesis gascatalytic conversion of carbon monoxide and steam in the raw synthesis gas to carbon dioxide and hydrogen in a water gas shift conversion step to provide a shifted gascontacting the shifted gas with a solid sulphur sorbentregenerating the solid sulphur sorbent by passing a stream of steam through the solid sulphur sorbent counter current to the flow direction of the shifted gas to provide a hydrogen sulphide-containing stream of steamtransferring the hydrogen sulphide-containing stream of steam from the solid sulphur sorbent directly to the gasification reactorremoving the cleaned shifted gas from the solid sulphur sorbent.
REFERENCES:
patent: 4302218 (1981-11-01), Friedman
patent: 4769045 (1988-09-01), Grindley
patent: 5169612 (1992-12-01), Nielson
patent: WO 96/30465 (1996-10-01), None
Unites States Statutory Invention Registration H1538 to Harryman published Jun. 4, 1996.
Dickstein & Shapiro LLP
Haldor Topsoe A/S
Langel Wayne
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