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Novel concept prototype of low‐power‐consumption electrically heatable catalyst
Author(s) -
Nakouzi Sabine R.,
Narula Chaitanya K.,
McBride James R.,
Nietering Kenneth E.,
Visser Jacobus H.,
Adamczyk Andrew A.
Publication year - 1998
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690440119
Subject(s) - catalysis , carbon monoxide , palladium , platinum , tin oxide , gasoline , materials science , software deployment , exhaust gas , fluorine , hydrocarbon , waste management , chemical engineering , doping , optoelectronics , chemistry , computer science , organic chemistry , engineering , metallurgy , operating system
Electrically heated catalyst devices (EHCs) are important for treating exhaust gases in the 20 to 120 s warmup period after a cold start when about 70% of the total hydrocarbon (HC) and carbon monoxide (CO) emissions from a modern gasoline powered vehicle are released. Although known for several years, EHCs have not been deployed because these devices are cost‐ and energy‐intensive. An alternate EHC prototype proposed here is based on our reasoning that only the platinum group metals and the molecules undergoing oxidation need to be at light‐off temperatures and it is not necessary to waste energy to heat the whole catalyst. The concept prototype, fabricated on a glass coupon, resistively heats the fluorine doped tin oxide film beneath the washcoat to bring a palladium‐titania washcoat to the CO and HC light‐off temperatures. The electrically powered concept prototype showed light‐off temperatures of 250°C and 260°C for CO and HC, respectively, in laboratory tests with simulated exhaust gases at 25°C. A device based on this concept is estimated to attain the 1‐kW target power consumption required for the deployment of the EHC.