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:
Nov. 06, 1990
Filed:
Mar. 13, 1989
Robert J Radel, Florence, AL (US);
Tennessee Valley Authority, Muscle Shoals, AL (US);
Abstract
The invention described herein discloses the use of silica gel as a catalyst for the efficient oxidation of hydrogen sulfide to elemental sulfur by nitric oxide. Concomitantly, this catalyst also promotes the hydrolysis of carbonyl sulfide to carbon dioxide and hydrogen sulfide, which then can be oxidized further by nitric oxide in the same reactor to produce elemental a sulfur. This process is designed for application in coal combustion and coal-gasification processes as a replacement for the presently available and practiced expensive methods and means for gas purification and catalytic liquid-phase conversion of these gases to sulfur. A principal advantageous feature of the instant invention is the fact that practice thereof alleviates or removes the heretofore restrictions and impediments imposed on such or similar techniques of the prior art in that the sulfur-containing pollutants from many gas stream efluents such as, for example, those emitted by the combustion of high-sulfur content fossil fuel comprising coal and/or oil, can be effectively and efficiently treated, without the need or requirement to substantially adjust or change the enthalpy of such gas stream, to thereby effect the desired cleaning treatment thereof.