The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 1979
Filed:
Mar. 01, 1978
Paul Rudolph, Bad Homburg, DE;
Uwe D Marwig, Munster, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
In a process for producing a fuel gas from a solid fuel by a gasification of solid fuel under a pressure of about 15-100 bars by a treatment with steam and a gas which contains free oxygen, cooling the raw gas to a temperature of about 150.degree.-200.degree. C. and saturating it with water vapor, removing condensate which has formed so that the raw gas contains hydrocarbons having a boiling range from about 20.degree. to 400.degree. C. in an amount of about 10-100 g per standard m.sup.3 of dry gas and has a CO:H.sub.2 O volume ratio of about 0.8-2, and subjecting the raw gas to a shift conversion, the improvement which comprises dividing the raw gas into first and second partial streams in a ratio of about 1:10 to 1:1, feeding the first partial stream with a surplus of water vapor to a first shift conversion stage at an inlet temperature of about 280.degree.-450.degree. C., and passing through a second shift conversion stage a mixture of effluent gas from the first shift conversion stage and at least part of the second partial stream of raw gas at a temperature of about 300.degree.-500.degree. C., while maintaining a pressure of about 15-100 bars in the shift conversion stages. Advantageously water vapor is added to the raw gas entering the first shift conversion stage in at least about 70% of the stoichiometric amount required for shift conversion of all the carbon monoxide contained in the entire raw gas.