Main Title |
Hydrogen cyanide emissions from a three-way catalyst prototype / |
Author |
Holt, Eugene L.
|
Other Authors |
|
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 |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EKBD |
EPA-460/3-77/023 |
|
Research Triangle Park Library/RTP, NC |
03/21/2003 |
ELBD ARCHIVE |
EPA 460-3-77-023 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
NTIS |
PB-279 037 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
vi, [60] 13 pages ; 28 cm |
Abstract |
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. |
Notes |
"EPA-460/3-77-023." EPA contract no. 68-03-2485 ; EPA project officer: Robert Garbe. Includes bibliographical references (page 34). |
Place Published |
Ann Arbor, MI |
Access Notes |
Also available via the World Wide Web. |
Corporate Au Added Ent |
United States. Environmental Protection Agency. Office of Mobile Source Air Pollution Control. Emission Control Technology Division.; Exxon Research and Engineering. Product Research Division. |
PUB Date Free Form |
December 1977 |
NTIS Prices |
PC A04/MF A01 |
BIB Level |
m |
Medium |
unmediated |
Content |
text |
Carrier |
volume |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20170614081433 |
Language |
eng |
Origin |
OCLC |
Type |
MERGE |
OCLC Rec Leader |
01724cam 2200421Ka 45010 |