Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures
Abstract
A high-surface-area (greater than 600 m2/g), large-pore (pore size diameter greater than 6.5 angstroms), basic zeolite having a structure such as an alkali metal cation-exchanged Y-zeolite is employed to convert NO.sub.x contained in an oxygen-rich engine exhaust to N.sub.2 and O.sub.2. Preferably, the invention relates to a two-stage method and apparatus for NO.sub.x reduction in an oxygen-rich engine exhaust such as diesel engine exhaust that includes a plasma oxidative stage and a selective reduction stage. The first stage employs a non-thermal plasma treatment of NO.sub.x gases in an oxygen-rich exhaust and is intended to convert NO to NO.sub.2 in the presence of O.sub.2 and added hydrocarbons. The second stage employs a lean-NO.sub.x catalyst including the basic zeolite at relatively low temperatures to convert such NO.sub.2 to environmentally benign gases that include N.sub.2, CO.sub.2, and H.sub.2 O.
- Inventors:
- Issue Date:
- Research Org.:
- The Regents Of University Of California, Oakland, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1174710
- Patent Number(s):
- 6685897
- Application Number:
- 09/478,576
- Assignee:
- University Of California, The Regents Of
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02A - TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Penetrante, Bernardino M., Brusasco, Raymond M., Merritt, Bernard T., and Vogtlin, George E. Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures. United States: N. p., 2004.
Web.
Penetrante, Bernardino M., Brusasco, Raymond M., Merritt, Bernard T., & Vogtlin, George E. Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures. United States.
Penetrante, Bernardino M., Brusasco, Raymond M., Merritt, Bernard T., and Vogtlin, George E. Tue .
"Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures". United States. https://www.osti.gov/servlets/purl/1174710.
@article{osti_1174710,
title = {Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures},
author = {Penetrante, Bernardino M. and Brusasco, Raymond M. and Merritt, Bernard T. and Vogtlin, George E.},
abstractNote = {A high-surface-area (greater than 600 m2/g), large-pore (pore size diameter greater than 6.5 angstroms), basic zeolite having a structure such as an alkali metal cation-exchanged Y-zeolite is employed to convert NO.sub.x contained in an oxygen-rich engine exhaust to N.sub.2 and O.sub.2. Preferably, the invention relates to a two-stage method and apparatus for NO.sub.x reduction in an oxygen-rich engine exhaust such as diesel engine exhaust that includes a plasma oxidative stage and a selective reduction stage. The first stage employs a non-thermal plasma treatment of NO.sub.x gases in an oxygen-rich exhaust and is intended to convert NO to NO.sub.2 in the presence of O.sub.2 and added hydrocarbons. The second stage employs a lean-NO.sub.x catalyst including the basic zeolite at relatively low temperatures to convert such NO.sub.2 to environmentally benign gases that include N.sub.2, CO.sub.2, and H.sub.2 O.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 03 00:00:00 EST 2004},
month = {Tue Feb 03 00:00:00 EST 2004}
}