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Title: Diesel NO{sub x} reduction by plasma-regenerated absorbent beds

Abstract

Reduction of NO{sub x} from diesel engine exhaust by use of plasma-regenerated absorbent beds is described. This involves a process for the reduction of NO{sub x} and particulates from diesel engines by first absorbing NO{sub x} onto a solid absorbent bed that simultaneously acts as a physical trap for the particulate matter, and second regenerating said solid absorbent by pulsed plasma decomposition of absorbed NO{sub x} followed by air oxidation of trapped particulate matter. The absorbent bed may utilize all metal oxides, but the capacity and the kinetics of absorption and desorption vary between different materials, and thus the composition of the absorbent bed is preferably a material which enables the combination of NO{sub x} absorption capability with catalytic activity for oxidation of hydrocarbons. Thus, naturally occurring or synthetically prepared materials may be utilized, particularly those having NO{sub x} absorption properties up to temperatures around 400 C which is in the area of diesel engine exhaust temperatures. 1 fig.

Inventors:
;
Issue Date:
Research Org.:
Univ. of California (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
570480
Patent Number(s):
5715677
Application Number:
PAN: 8-748,081
Assignee:
Univ. of California, Oakland, CA (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 10 Feb 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 33 ADVANCED PROPULSION SYSTEMS; NITROGEN OXIDES; PARTICULATES; ADSORBENTS; FILTERS; DIESEL ENGINES; EXHAUST GASES; AIR POLLUTION CONTROL; REGENERATION; PLASMA HEATING

Citation Formats

Wallman, P H, and Vogtlin, G E. Diesel NO{sub x} reduction by plasma-regenerated absorbent beds. United States: N. p., 1998. Web.
Wallman, P H, & Vogtlin, G E. Diesel NO{sub x} reduction by plasma-regenerated absorbent beds. United States.
Wallman, P H, and Vogtlin, G E. Tue . "Diesel NO{sub x} reduction by plasma-regenerated absorbent beds". United States.
@article{osti_570480,
title = {Diesel NO{sub x} reduction by plasma-regenerated absorbent beds},
author = {Wallman, P H and Vogtlin, G E},
abstractNote = {Reduction of NO{sub x} from diesel engine exhaust by use of plasma-regenerated absorbent beds is described. This involves a process for the reduction of NO{sub x} and particulates from diesel engines by first absorbing NO{sub x} onto a solid absorbent bed that simultaneously acts as a physical trap for the particulate matter, and second regenerating said solid absorbent by pulsed plasma decomposition of absorbed NO{sub x} followed by air oxidation of trapped particulate matter. The absorbent bed may utilize all metal oxides, but the capacity and the kinetics of absorption and desorption vary between different materials, and thus the composition of the absorbent bed is preferably a material which enables the combination of NO{sub x} absorption capability with catalytic activity for oxidation of hydrocarbons. Thus, naturally occurring or synthetically prepared materials may be utilized, particularly those having NO{sub x} absorption properties up to temperatures around 400 C which is in the area of diesel engine exhaust temperatures. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {2}
}

Works referenced in this record:

Selective Catalytic Reduction of NOx in the Presence of Oxygen
journal, October 1994