Carl W Kruse

US Patent:

47583312, Jul 19, 1988

Filed:

Feb 27, 1984

Appl. No.:

6/583287

Inventors:

Carl W. Kruse - Champaign IL
Neil F. Shimp - Urbana IL
Roy J. Helfinstine - Champaign IL
Jimmie D. Cooper - Champaign IL

Assignee:

Board of Trustees, University of Illinois - Urbana IL

International Classification:

C10G 100
C10G 106

US Classification:

208403

Abstract:

Fine particles of solid fossil fuels are pyrolyzed by passage in a thin layer through a heating zone at successively higher temperatures in a non-oxidizing atmosphere while rapidly separating and removing volatile pyrolysis products. The resulting char may be first treated with mineral acid or employed directly in the hydroprocessing of additional solid fossil fuel to liquid fuels. Alternatively, the acid-washed char may be hydrotreated to afford an improved char product having a low sulfur and mineral content.