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Title: Diesel NO.sub.x reduction by plasma-regenerated absorbend beds

Abstract

Reduction of NO.sub.x from diesel engine exhaust by use of plasma-regenerated absorbent beds. 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.degree. C. which is in the area of diesel engine exhaust temperatures.

Inventors:
 [1];  [2]
  1. Berkeley, CA
  2. Fremont, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871358
Patent Number(s):
5715677
Assignee:
Regents Of University Of California (Oakland, CA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
diesel; reduction; plasma-regenerated; absorbend; beds; engine; exhaust; absorbent; involves; process; particulates; engines; absorbing; solid; bed; simultaneously; physical; trap; particulate; matter; regenerating; pulsed; plasma; decomposition; absorbed; followed; air; oxidation; trapped; utilize; metal; oxides; capacity; kinetics; absorption; desorption; vary; materials; composition; preferably; material; enables; combination; capability; catalytic; activity; hydrocarbons; naturally; occurring; synthetically; prepared; utilized; particularly; properties; temperatures; 400; degree; diesel engines; solid absorbent; naturally occurring; diesel engine; catalytic activity; particulate matter; metal oxide; metal oxides; engine exhaust; absorption properties; air oxidation; pulsed plasma; trapped particulate; /60/

Citation Formats

Wallman, P Henrik, and Vogtlin, George E. Diesel NO.sub.x reduction by plasma-regenerated absorbend beds. United States: N. p., 1998. Web.
Wallman, P Henrik, & Vogtlin, George E. Diesel NO.sub.x reduction by plasma-regenerated absorbend beds. United States.
Wallman, P Henrik, and Vogtlin, George E. Thu . "Diesel NO.sub.x reduction by plasma-regenerated absorbend beds". United States. https://www.osti.gov/servlets/purl/871358.
@article{osti_871358,
title = {Diesel NO.sub.x reduction by plasma-regenerated absorbend beds},
author = {Wallman, P Henrik and Vogtlin, George E},
abstractNote = {Reduction of NO.sub.x from diesel engine exhaust by use of plasma-regenerated absorbent beds. 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.degree. C. which is in the area of diesel engine exhaust temperatures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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