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. 24, 2020
Filed:
Sep. 25, 2017
Shell Oil Company, Houston, TX (US);
Wenzhong Zhang, Houston, TX (US);
Geert Marten Bakker, Amsterdam, NL;
SHELL OIL COMPANY, Houston, TX (US);
Abstract
The invention provides a method of reducing the amount of nitrogen oxide components in a process gas stream comprising: a) contacting a deNOcatalyst with the process gas in the presence of ammonia which results in the conversion of nitrogen oxide components as well as a decline in the NOconversion over the deNOcatalyst; and b) regenerating the deNOcatalyst to improve the NOconversion by contacting the deNOcatalyst at a temperature in the range of from 250 to 390° C. with a flow of ammonia that is reduced relative to the flow of ammonia in step a) and process gas, air or a mixture thereof.