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Title: Reduction of NOx by plasma-facilitated catalysis over In-doped y-alumina

Abstract

Sol-gel derived g-alumina and its 2.5% In-doped derivative were examined as plasma-activated catalysts for reduction of NOx in model lean burn exhaust. The extent of promotional effect on catalysis due to In-doping depends both on the speciation of hydrocarbon used as a reducing agent in addition to reaction temperature. In/g-alumina catalysts were tested with eight hydrocarbons (propane, propene, methanol, ethanol, 1-propanol, 2-propanol, acetaldehyde, isooctane) at a C1:N ratio of 12 to investigate the effect of hydrocarbon structure and chemistry on activity for plasma-enhanced catalysis. The degree of saturation, functionality, the location of the functional group, as well as the molecular size all proved to have an impact on the ability of the hydrocarbon to participate in NOx reduction chemistry. Plasma assist provided benefits at moderate temperature, but NOx reduction was dominated by thermal activity (no plasma required) at high temperature. The effect of aging on catalyst performance was also examined, and the most negative impact on thermal activity was observed at moderate temperatures. Plasma assist resulted in recovery of nearly all activity for most of the oxygenated hydrocarbons examined. At high temperature, aging had negligible impact on catalyst performance with the exception of catalytic reduction with methanol.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15007433
Report Number(s):
PNNL-SA-38073
VT0402000
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Journal Article
Journal Name:
Applied Catalysis. B, Environmental, 48(2):155-164
Additional Journal Information:
Journal Name: Applied Catalysis. B, Environmental, 48(2):155-164
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS

Citation Formats

Tran, Diana N, Aardahl, Chris L, Rappe, Kenneth G, Park, Paul W, and Boyer, C L. Reduction of NOx by plasma-facilitated catalysis over In-doped y-alumina. United States: N. p., 2004. Web. doi:10.1016/j.apcatb.2003.10.008.
Tran, Diana N, Aardahl, Chris L, Rappe, Kenneth G, Park, Paul W, & Boyer, C L. Reduction of NOx by plasma-facilitated catalysis over In-doped y-alumina. United States. https://doi.org/10.1016/j.apcatb.2003.10.008
Tran, Diana N, Aardahl, Chris L, Rappe, Kenneth G, Park, Paul W, and Boyer, C L. 2004. "Reduction of NOx by plasma-facilitated catalysis over In-doped y-alumina". United States. https://doi.org/10.1016/j.apcatb.2003.10.008.
@article{osti_15007433,
title = {Reduction of NOx by plasma-facilitated catalysis over In-doped y-alumina},
author = {Tran, Diana N and Aardahl, Chris L and Rappe, Kenneth G and Park, Paul W and Boyer, C L},
abstractNote = {Sol-gel derived g-alumina and its 2.5% In-doped derivative were examined as plasma-activated catalysts for reduction of NOx in model lean burn exhaust. The extent of promotional effect on catalysis due to In-doping depends both on the speciation of hydrocarbon used as a reducing agent in addition to reaction temperature. In/g-alumina catalysts were tested with eight hydrocarbons (propane, propene, methanol, ethanol, 1-propanol, 2-propanol, acetaldehyde, isooctane) at a C1:N ratio of 12 to investigate the effect of hydrocarbon structure and chemistry on activity for plasma-enhanced catalysis. The degree of saturation, functionality, the location of the functional group, as well as the molecular size all proved to have an impact on the ability of the hydrocarbon to participate in NOx reduction chemistry. Plasma assist provided benefits at moderate temperature, but NOx reduction was dominated by thermal activity (no plasma required) at high temperature. The effect of aging on catalyst performance was also examined, and the most negative impact on thermal activity was observed at moderate temperatures. Plasma assist resulted in recovery of nearly all activity for most of the oxygenated hydrocarbons examined. At high temperature, aging had negligible impact on catalyst performance with the exception of catalytic reduction with methanol.},
doi = {10.1016/j.apcatb.2003.10.008},
url = {https://www.osti.gov/biblio/15007433}, journal = {Applied Catalysis. B, Environmental, 48(2):155-164},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {3}
}