Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Hydrogen cyanide emissions from a three-way catalyst prototype /
Author Holt, Eugene L.
Other Authors
Author Title of a Work
Keirns, Mary Hull.
Publisher U.S. Environmental Protection Agency, Office of Mobile Source Air Pollution Control,
Year Published 1977
Report Number EPA 460/3-77/023; EPA-68-03-2485
Stock Number PB-279 037
OCLC Number 40198356
Subjects Automobiles--Pollution control devices.
Additional Subjects Hydrogen cyanide ; Catalysts ; Exhaust emissions ; Performance evaluation ; Hydrogen sulfide ; Sulfates ; Ammonia ; Concentration(Composition) ; Platinum ; Rhodium ; Fuel consumption ; Gas analysis ; Chemical analysis ; Air pollution ; Monitoring ; Failure ; Carbon monoxide ; Hydrocarbons ; Nitrogen oxides ; Electrodes ; Catalytic reactors(Exhaust systems) ; Air pollution detection ; Air fuel ratio ; Ion selective electrodes
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 460-3-77-023 Headquarters Library/Washington,DC 04/27/2012
EKBD  EPA-460/3-77/023 Research Triangle Park Library/RTP, NC 03/21/2003
NTIS  PB-279 037 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation vi, [60] 13 pages ; 28 cm
Four catalysts, nominally identical except for Pt/Rh ratio, were tested for emissions of regulated pollutants and for HCN, NH3, SO4(-2) and H2S. Fuel economy was also measured. The tests were conducted over the FTP, CFDS, and 64 and 80 kph cruise modes, using three simulated malfunction modes: O2 sensor disconnected-idle adjustment correct; O2 sensor disconnected-idle adjustment enriched; 13% misfire. The catalysts were prepared by Engelhard Industries under conditions similar to those used in making commercial three-way catalysts. A prototype Volvo TWC vehicle was the test car. The four catalysts contained respectively: Rh only, 17% Rh-Pt; 5% Rh-Pt; Pt only. Tests were also run with no catalyst under the malfunction modes and with each catalyst under normal engine conditions. Of the fifteen possible test combinations (four catalysts and no catalyst x 3 malfunction modes), twelve were chosen to be run, with four replicates, giving sixteen runs total. No HCN was detected at the tailpipe under normal operating conditions over the FTP. However, under the malfunction modes, HCN emissions were generally found. During the FTP and CFDS cycles all of the catalysts appeared to remove some HCN from the exhaust gas under all malfunction modes, but during cruise some catalysts under certain malfunctions caused a further increase in tailpipe HCN emissions. The maximum level observed was about 40 mg/km.
"EPA-460/3-77-023." EPA contract no. 68-03-2485 ; EPA project officer: Robert Garbe. Includes bibliographical references (page 34).