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:
Apr. 05, 2005
Filed:
Nov. 09, 2001
Bing Zhou, Cranbury, NJ (US);
Lap-keung Lee, West Windsor, NJ (US);
Naresh J. Suchak, N. Plainfield, NJ (US);
Bing Zhou, Cranbury, NJ (US);
Lap-Keung Lee, West Windsor, NJ (US);
Naresh J. Suchak, N. Plainfield, NJ (US);
Hydrocarbon Technologies, Inc., Lawrenceville, NJ (US);
Abstract
A bi-functional oxidation catalyst and process for catalytic oxidation and removal of nitrogen oxides (NO) from combustion gases derived from combustion of carbonaceous fuels such as coal, oil, or natural gas. The bi-functional catalyst includes adsorption and oxidation function metal oxides provided in adjacent close intimate contact by utilizing a binding agent, such as carboxylic acid and calcining to provide a metal oxide complex having a crystalline form. Such nitrogen oxides (NO) contained in the combustion gases are initially catalytically oxidized to at least about 50 vol % NOand some higher oxides by contact with the bi-functional catalyst at 170-550° F. temperature. The combustion gas containing the partially oxidized NOis then preferably further chemically oxidized by being mixed with a chemical oxidant such as ozone (O) in a molar ratio of the chemical oxidantto NOin the range of 0.5:1-1.2:1 to produce higher oxides of nitrogen such as substantially NO. The further treated combustion gas containing the NOis next scrubbed with a suitable scrubbing liquid such as water to effectively remove the nitrogen oxides (NO) and produce a clean treated flue gas stream containing less than about 15 ppm nitrogen oxides and suitable for environmentally safe discharge to the atmosphere.