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Title: Nitric oxide reduction using NH{sub 3} and CH{sub 4} as reducing agents

Abstract

Catalytic reduction of nitric oxide has attracted much attention in recent years due to stricter environmental regulations imposed by several countries. Current technology uses ammonia to reduce NO{sub x} over a catalyst. Several studies addressing issues regarding the fundamental catalytic phenomena involved in the NO{sub x}-NH{sub 3} reactions have been performed. Although ammonia is a good reducing agent, it has some inherent problems such as corrosion of downstream equipment due to ammonia salt formation, ammonia slip, and direct ammonia oxidation at high temperatures. These problems have prompted several researchers to look at hydrocarbons, specially lower alkanes, as alternative reducing agents. Methane, being the most abundantly available hydrocarbon, offers an attractive alternative. In this study the authors have investigated vanadia-titania based catalysts and Pd/titania catalysts for NO reduction using ammonia and methane as reducing agents, respectively. The catalysts were characterized using BET surface area measurements. X-ray photoelectron spectroscopy, and thermal analysis techniques. Activity and selectivity studies were performed in a fixed-bed catalytic reactor. The feed and product analysis was done on-line using a combination of gas chromatography, mass spectroscopy, wet chemistry, and chemiluminescence techniques. Isotopic tracer transient studies were also performed to understand the mechanism of these reactions. Results from themore » characterization studies have been combined with those from steady state, as well as transient reaction studies to address some fundamental issues regarding the catalysis of NO reduction reactions.« less

Authors:
;  [1]
  1. Ohio State Univ., Columbus, OH (United States). Dept. of Engineering
Publication Date:
OSTI Identifier:
549614
Report Number(s):
CONF-960954-
TRN: IM9751%%297
Resource Type:
Conference
Resource Relation:
Conference: 13. annual international Pittsburgh coal conference, Pittsburgh, PA (United States), 3-7 Sep 1996; Other Information: PBD: 1996; Related Information: Is Part Of Thirteenth annual international Pittsburgh coal conference: Proceedings. Volume 2; Chiang, S.H. [ed.]; PB: 819 p.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; NITRIC OXIDE; SELECTIVE CATALYTIC REDUCTION; AIR POLLUTION CONTROL; AMMONIA; METHANE; REDUCING AGENTS; CATALYSTS; MATERIALS TESTING; VANADIUM OXIDES; TITANIUM OXIDES; PALLADIUM

Citation Formats

Ozkan, U S, and Kumthekar, M W. Nitric oxide reduction using NH{sub 3} and CH{sub 4} as reducing agents. United States: N. p., 1996. Web.
Ozkan, U S, & Kumthekar, M W. Nitric oxide reduction using NH{sub 3} and CH{sub 4} as reducing agents. United States.
Ozkan, U S, and Kumthekar, M W. Tue . "Nitric oxide reduction using NH{sub 3} and CH{sub 4} as reducing agents". United States.
@article{osti_549614,
title = {Nitric oxide reduction using NH{sub 3} and CH{sub 4} as reducing agents},
author = {Ozkan, U S and Kumthekar, M W},
abstractNote = {Catalytic reduction of nitric oxide has attracted much attention in recent years due to stricter environmental regulations imposed by several countries. Current technology uses ammonia to reduce NO{sub x} over a catalyst. Several studies addressing issues regarding the fundamental catalytic phenomena involved in the NO{sub x}-NH{sub 3} reactions have been performed. Although ammonia is a good reducing agent, it has some inherent problems such as corrosion of downstream equipment due to ammonia salt formation, ammonia slip, and direct ammonia oxidation at high temperatures. These problems have prompted several researchers to look at hydrocarbons, specially lower alkanes, as alternative reducing agents. Methane, being the most abundantly available hydrocarbon, offers an attractive alternative. In this study the authors have investigated vanadia-titania based catalysts and Pd/titania catalysts for NO reduction using ammonia and methane as reducing agents, respectively. The catalysts were characterized using BET surface area measurements. X-ray photoelectron spectroscopy, and thermal analysis techniques. Activity and selectivity studies were performed in a fixed-bed catalytic reactor. The feed and product analysis was done on-line using a combination of gas chromatography, mass spectroscopy, wet chemistry, and chemiluminescence techniques. Isotopic tracer transient studies were also performed to understand the mechanism of these reactions. Results from the characterization studies have been combined with those from steady state, as well as transient reaction studies to address some fundamental issues regarding the catalysis of NO reduction reactions.},
doi = {},
url = {https://www.osti.gov/biblio/549614}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Conference:
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