Electrochemical promotion in a monolith electrochemical plate reactor applied to simulated and real automotive pollution control

Abstract

c Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4 9NH, UKThe novel monolithic-type electrochemical promoted reactor (MEPR), filled with thick Rh and Pt coated films on thin yttriastabilized zirconia (YSZ) plates, has been tested in simulated and real automotive exhaust gas. Ethylene oxidation and NO reduction by C 2 H 4 in presence of oxygen were investigated in laboratory scale while the automotive bench testing was performed in the exhaust of a diesel engine. In all cases electropromotion was achieved, an advance which in addition to their compact and simple design, makes electropromoted units quite promising for automotive exhaust pollution control.

Effect of infiltration material on a LSM15/CGO10 electrochemical reactor in the electrochemical oxidation of propene

“…This phenomenon has also been studied using conversion and product selectivity [12]. Finally, Balomenou et al developed a monolith electrochemical plate reactor (MEPR) using Pt and Rh dispersed on a YSZ plate to measure the abatement of simulated and real automotive pollution and achieved electrochemical promotion in both situations [13].…”

Tailor-structured skeletal Pt catalysts employed in a monolithic electropromoted reactor

“…In practical electrochemically promoted units [20][21][22] aiming at near complete reactant conversion a third important parameter is the effective rate enhancement ratio, q c , defined from:…”

“…The electropromoted reactor has already been evaluated successfully for hydrocarbon oxidation and NO reduction by C 2 H 4 in the presence of O 2 using both conventional thick films and thin sputtered noble metal electrodes [4,[20][21][22]. It was also tested for the treatment of automotive exhaust gas of a real diesel engine [22] demonstrating excellent mechanical and thermal stability after prolonged operation.…”

Electrochemical promotion of NO reduction by C2H4 in 10% O2 using a monolithic electropromoted reactor with Rh/YSZ/Pt elements

“…These studies have utilized YSZ [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39], b 00 -Al 2 O 3 [40][41][42][43][44][45][46][47][48][49], Nasicon [50], and proton conductor [51] solid electrolytes and, with very few recent exceptions [34][35][36][37][38], thick (0.5-1 lm) porous metal films. With a very recent exception utilizing Pt-Rh alloy catalysts [38], they were also limited to p O 2 values below 2% where the O 2 poisoning problem is not pronounced.…”

“…With a very recent exception utilizing Pt-Rh alloy catalysts [38], they were also limited to p O 2 values below 2% where the O 2 poisoning problem is not pronounced. The large majority of these studies were also limited to single-pellet reactors and only recently a monolithic electropromoted reactor (MEPR) was utilized for laboratory studies [34][35][36][37][38] and also tested under real car exhaust conditions [37] with moderate success and under relatively high fuel injection in the exhaust.…”