Heater and catalytic converter

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 20/18 (2006.01) F01N 13/00 (2010.01) B01D 53/94 (2006.01) B01J 29/00 (2006.01) B01J 29/40 (2006.01) B01J 29/46 (2006.01) B01J 35/00 (2006.01) B01J 35/04 (2006.01) F01N 3/08 (2006.01) F01N 3/20 (2006.01) F01N 3/28 (2006.01) H05B 3/14 (2006.01)

Patent

CA 2054462

A heater is composed of (a) a honeycomb structure having a large number of passages, (b) an adsorbent composed mainly of zeolite or an adsorbent-catalyst composition comprising said adsorbent and a catalyst component supported on the adsorbent, coated on the honeycomb structure and (c) at least two electrodes for electrification of the honeycomb structure, fixed to the honeycomb structure, in which heater a gas is allowed to flow through the passages in the honeycomb structure and heated. A catalytic converter has at least one main monolith catalyst and the above heater provided upstream or downstream of the main monolith catalyst or between the main monolith catalysts. A catalytic converter for purification of automobile exhaust gas, has (a) at least one main monolith catalyst, (b) a honeycomb heater comprising a honeycomb structure having a large number of passages and at least two electrodes for electrification fixed to the honeycomb structure and (c) an adsorbent composed mainly of zeolite, all of the at least one main monolith catalyst (a), the honeycomb heater (b) and the adsorbent (c) being provided in the exhaust gas system of an automobile.

Un appareil de chauffage se compose de ce qui suit: (a) une structure en nid d'abeille comportant un grand nombre de passages, (b) un adsorbant constitué principalement de zéolite ou une composition adsorbant-catalyseur comprenant ledit adsorbant et un élément catalyseur prenant support sur l'adsorbant, revêtissant la structure en nid d'abeille et (c) au moins deux électrodes pour l'électrification de la structure en nid d'abeille, fixées à la structure en nid d'abeille; dans ledit appareil de chauffage, on laisse s'écouler un gaz dans les passages de la structure en nid d'abeille où il est chauffé. Un convertisseur catalytique comporte au moins un catalyseur monolithique principal et ledit appareil de chauffage installé en amont ou en aval du catalyseur monolithique principal ou entre les catalyseurs monolithiques principaux. Un convertisseur catalytique pour la purification des gaz d'échappement d'une automobile comporte (a) au moins un catalyseur monolithique principal, (b) un appareil de chauffage à nid d'abeille comprenant une structure en nid d'abeille qui comporte un grand nombre de passages et au moins deux électrodes pour l'électrification fixées à la structure en nid d'abeille et (c) un adsorbant composé principalement de zéolite, tous lesdits éléments, soit au moins un catalyseur monolithique principal (a), l'appareil de chauffage à nid d'abeille (b) et l'adsorbant (c), étant intégrés au système d'échappement d'une automobile.

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