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Title: Steady-State Engine Testing of gamma-Alumina Catalysts Under Plasma Assist for NOx Control in Heavy-Duty Diesel Exhaust

Abstract

A slipstream of exhaust from a Caterpillar 3126B engine was diverted into a plasma-catalytic NOx control system in the space velocity range of 7,000 to 100,000 hr-1. The stream was first fed through a non-thermal plasma that was formed in a coaxial cylinder dielectric barrier discharge reactor. Plasma treated gas was then passed over a catalyst bed held at constant temperature in the range of 573 to 773 K. Catalysts examined consisted of g-alumina, In/g-alumina, and Ag/g-alumina. Road and rated load conditions resulted in engine out NOx levels of 250 ? 600 ppm. The effects of hydrocarbon level, catalyst temperature, and space velocity are discussed where propene and in one case ultra-low sulfur diesel fuel (late cycle injection) were the reducing agents used for NOx reduction. Results showed NOx reduction in the range of 25 ? 97% depending on engine operating conditions and management of the catalyst and slipstream conditions.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
985607
Report Number(s):
PNNL-SA-37494
VT0402000; TRN: US201016%%2065
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Lean Engine NOx Control: SAE World Congress, SAE SP 1759:121-128, Paper No. 2003-01-1186
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 36 MATERIALS SCIENCE; CATALYSTS; CONTROL SYSTEMS; DIELECTRIC MATERIALS; DIESEL FUELS; ENGINES; HYDROCARBONS; MANAGEMENT; PLASMA; PROPYLENE; REDUCING AGENTS; SULFUR; TESTING; VELOCITY

Citation Formats

Aardahl, Christopher L., Rappe, Kenneth G., Park, Paul W., Ragle, C. S., Boyer, C. L., and Faulkner, Steve. Steady-State Engine Testing of gamma-Alumina Catalysts Under Plasma Assist for NOx Control in Heavy-Duty Diesel Exhaust. United States: N. p., 2003. Web. doi:10.4271/2003-01-1186.
Aardahl, Christopher L., Rappe, Kenneth G., Park, Paul W., Ragle, C. S., Boyer, C. L., & Faulkner, Steve. Steady-State Engine Testing of gamma-Alumina Catalysts Under Plasma Assist for NOx Control in Heavy-Duty Diesel Exhaust. United States. doi:10.4271/2003-01-1186.
Aardahl, Christopher L., Rappe, Kenneth G., Park, Paul W., Ragle, C. S., Boyer, C. L., and Faulkner, Steve. Wed . "Steady-State Engine Testing of gamma-Alumina Catalysts Under Plasma Assist for NOx Control in Heavy-Duty Diesel Exhaust". United States. doi:10.4271/2003-01-1186.
@article{osti_985607,
title = {Steady-State Engine Testing of gamma-Alumina Catalysts Under Plasma Assist for NOx Control in Heavy-Duty Diesel Exhaust},
author = {Aardahl, Christopher L. and Rappe, Kenneth G. and Park, Paul W. and Ragle, C. S. and Boyer, C. L. and Faulkner, Steve},
abstractNote = {A slipstream of exhaust from a Caterpillar 3126B engine was diverted into a plasma-catalytic NOx control system in the space velocity range of 7,000 to 100,000 hr-1. The stream was first fed through a non-thermal plasma that was formed in a coaxial cylinder dielectric barrier discharge reactor. Plasma treated gas was then passed over a catalyst bed held at constant temperature in the range of 573 to 773 K. Catalysts examined consisted of g-alumina, In/g-alumina, and Ag/g-alumina. Road and rated load conditions resulted in engine out NOx levels of 250 ? 600 ppm. The effects of hydrocarbon level, catalyst temperature, and space velocity are discussed where propene and in one case ultra-low sulfur diesel fuel (late cycle injection) were the reducing agents used for NOx reduction. Results showed NOx reduction in the range of 25 ? 97% depending on engine operating conditions and management of the catalyst and slipstream conditions.},
doi = {10.4271/2003-01-1186},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {1}
}

Conference:
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