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:
Jan. 01, 2002
Filed:
Jan. 11, 2001
Process for the selective catalytic reduction of the nitrogen oxides contained in a lean exhaust gas
Applicant:
Inventors:
Jürgen Gieshoff, Biebergemünd, DE;
Hans Van Den Tillaart, Freigericht, DE;
Thomas Kreuzer, Karben, DE;
Egbert Lox, Hanau, DE;
Jürgen Lang, Kirchheim-Teck, DE;
Assignee:
Degussa AG, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 5/358 ;
U.S. Cl.
CPC ...
B01D 5/358 ;
Abstract
The invention relates to a process for the selective catalytic reduction of the nitrogen oxides contained in a lean exhaust gas from internal combustion engines by reducing the nitrogen oxides by means of ammonia on a catalyst. The process is characterized in that, in addition to the lean exhaust gas, a rich gas stream is produced that is treated in an electrical gas discharge plasma in order to form the ammonia required for the reduction.