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Title: Investigation of the reaction pathways in selective catalytic reduction of NO with NH{sub 3} over V{sub 2}O{sub 5} catalysts: Isotopic labeling studies using {sup 18}O{sub 2}, {sup 15}NH{sub 3}, {sup 15}NO, and {sup 15}N{sup 18}O{sup 1}

Abstract

Isotopic tracer studies were performed to investigate the reaction network of selective catalytic reduction of nitric oxide over vanadia catalysts having preferential exposure of different crystal planes. The catalysts were characterized using BET surface area analysis, X-ray diffraction, laser Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, 3-D imaging, and thermal analysis techniques. The product analysis was carried out by a combination of chemiluminescence NO{sub x} analysis, gas chromatography-mass spectrometry, and chemical titration methods. The isotropic labeling experiments were performed under steady state reaction conditions by using NH{sub 3} + NO + {sup 16}O{sub 2} {r_arrow} NH{sub 3} + NO + {sup 18}O{sub 2}, {sup 14}NH{sub 3} + NO + O{sub 2} {r_arrow} {sup 15}NH{sub 3} + NO + O{sub 2}, NH{sub 3} + {sup 14}NO + O{sub 2} {r_arrow} NH{sub 3} + {sup 15}NO + O{sub 2}, and NH{sub 3} + {sup 14}N{sup 16}O + {sup 16}O{sub 2} {r_arrow} NH{sub 3} + {sup 15}N{sub 18}O + {sup 18}O{sub 2} switches. Interaction of NO with the vanadia surface was also studied using a {sup 14}N{sup 16}O {r_arrow} {sup 15}N{sup 18}O switch. The results obtained in these experiments were combined with the tracer studies performed in ammonia oxidation reactions over themore » same catalysts to elucidate the reaction pathways involved in SCR reactions, to compare the surface residence times of nitrogen containing species, as well as to quantify the role of ammonia oxidation in SCR reactions. 35 refs., 14 figs., 3 tabs.« less

Authors:
; ;  [1]
  1. Ohio State Univ., Columbus, OH (United States)
Publication Date:
OSTI Identifier:
98932
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 149; Journal Issue: 2; Other Information: PBD: Oct 1994
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 20 FOSSIL-FUELED POWER PLANTS; 33 ADVANCED PROPULSION SYSTEMS; NITRIC OXIDE; SELECTIVE CATALYTIC REDUCTION; VANADIUM OXIDES; CATALYTIC EFFECTS; MASS SPECTROSCOPY; LABELLING; OXYGEN 18; NITROGEN 15; SURFACE AREA; X-RAY DIFFRACTION; RAMAN EFFECT; X-RAY SPECTROSCOPY; PHOTOELECTRON SPECTROSCOPY; SCANNING ELECTRON MICROSCOPY; THERMAL ANALYSIS; CHEMILUMINESCENCE; GAS CHROMATOGRAPHY; TITRATION

Citation Formats

Ozkan, U S, Cai, Y, and Kumthekar, M W. Investigation of the reaction pathways in selective catalytic reduction of NO with NH{sub 3} over V{sub 2}O{sub 5} catalysts: Isotopic labeling studies using {sup 18}O{sub 2}, {sup 15}NH{sub 3}, {sup 15}NO, and {sup 15}N{sup 18}O{sup 1}. United States: N. p., 1994. Web. doi:10.1006/jcat.1994.1306.
Ozkan, U S, Cai, Y, & Kumthekar, M W. Investigation of the reaction pathways in selective catalytic reduction of NO with NH{sub 3} over V{sub 2}O{sub 5} catalysts: Isotopic labeling studies using {sup 18}O{sub 2}, {sup 15}NH{sub 3}, {sup 15}NO, and {sup 15}N{sup 18}O{sup 1}. United States. https://doi.org/10.1006/jcat.1994.1306
Ozkan, U S, Cai, Y, and Kumthekar, M W. 1994. "Investigation of the reaction pathways in selective catalytic reduction of NO with NH{sub 3} over V{sub 2}O{sub 5} catalysts: Isotopic labeling studies using {sup 18}O{sub 2}, {sup 15}NH{sub 3}, {sup 15}NO, and {sup 15}N{sup 18}O{sup 1}". United States. https://doi.org/10.1006/jcat.1994.1306.
@article{osti_98932,
title = {Investigation of the reaction pathways in selective catalytic reduction of NO with NH{sub 3} over V{sub 2}O{sub 5} catalysts: Isotopic labeling studies using {sup 18}O{sub 2}, {sup 15}NH{sub 3}, {sup 15}NO, and {sup 15}N{sup 18}O{sup 1}},
author = {Ozkan, U S and Cai, Y and Kumthekar, M W},
abstractNote = {Isotopic tracer studies were performed to investigate the reaction network of selective catalytic reduction of nitric oxide over vanadia catalysts having preferential exposure of different crystal planes. The catalysts were characterized using BET surface area analysis, X-ray diffraction, laser Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, 3-D imaging, and thermal analysis techniques. The product analysis was carried out by a combination of chemiluminescence NO{sub x} analysis, gas chromatography-mass spectrometry, and chemical titration methods. The isotropic labeling experiments were performed under steady state reaction conditions by using NH{sub 3} + NO + {sup 16}O{sub 2} {r_arrow} NH{sub 3} + NO + {sup 18}O{sub 2}, {sup 14}NH{sub 3} + NO + O{sub 2} {r_arrow} {sup 15}NH{sub 3} + NO + O{sub 2}, NH{sub 3} + {sup 14}NO + O{sub 2} {r_arrow} NH{sub 3} + {sup 15}NO + O{sub 2}, and NH{sub 3} + {sup 14}N{sup 16}O + {sup 16}O{sub 2} {r_arrow} NH{sub 3} + {sup 15}N{sub 18}O + {sup 18}O{sub 2} switches. Interaction of NO with the vanadia surface was also studied using a {sup 14}N{sup 16}O {r_arrow} {sup 15}N{sup 18}O switch. The results obtained in these experiments were combined with the tracer studies performed in ammonia oxidation reactions over the same catalysts to elucidate the reaction pathways involved in SCR reactions, to compare the surface residence times of nitrogen containing species, as well as to quantify the role of ammonia oxidation in SCR reactions. 35 refs., 14 figs., 3 tabs.},
doi = {10.1006/jcat.1994.1306},
url = {https://www.osti.gov/biblio/98932}, journal = {Journal of Catalysis},
number = 2,
volume = 149,
place = {United States},
year = {1994},
month = {10}
}