Plasma technology for tail pipe reduction of NO{sub x} in diesel exhaust [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 9 pages : digital, PDF file
Additional Creators: Lawrence Livermore National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access

Free-to-read Unrestricted online access

Summary

In the conventional application of plasmas to the treatment of power plant flue gases, the plasma is used to oxidize NOₓ to nitric acid; the final product us ammonium nitrate, which is obtained by addition of ammonia. A critical issue in the application of plasmas to cars and trucks is whether the plasma can remove the NOₓ by direct chemical reduction to N₂. We have found that gas-phase reactions in the plasma alone cannot lead to true chemical reduction of NOₓ. Any reduction of NOₓto N₂ can only be accomplished through heterogeneous reactions of NO₂ with surfaces or particulates. This paper discusses how the plasma oxidation of NO to NO₂ can be utilized to enhance the heterogeneous catalytic reduction of NOₓ to N₂. Plasma- assisted heterogeneous catalysis can enhance the NOₓ reduction under conditions that normally make it difficult for either the plasma or the catalyst to function by itself. The combination of a plasmas with a catalyst opens the opportunity for a new class of catalysts that are potentially more durable, more active, more selective and more sulfur-tolerant compared to conventional lean-NOₓ catalysts.

Report Numbers

E 1.99:ucrl-jc--129948
E 1.99: conf-9711189--
conf-9711189--
ucrl-jc--129948

Subject(s)

Other Subject(s)

Note

Published through SciTech Connect.
03/01/1998.
"ucrl-jc--129948"
" conf-9711189--"
"DE98057718"
"KC0302010"
Symposium on air pollution health impacts: recent findings, implications, dieselization and policy initiatives, Diamond Car, CA (United States), 20-21 Nov 1997.
Vogtlin, G.E.; Merritt, B.T.; Brusasco, R.M.; Penetrante, B.M.

Funding Information

W-7405-ENG-48

View MARC record | catkey: 14136120