EP0485179A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heater and catalytic converter
Assignee: NGK Insulators Ltd
•
Filing: 1991-11-05
•
Granted: —
•
Expires: 2011-11-05
Abstract
Abstract 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 (3) and the above heater (2) 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 (3), (b) a honeycomb heater (2) 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 (1) composed mainly of zeolite.
Inventors
- 👤 Fumio Abe
- 👤 Keiji Noda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 09:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/9454; B01D53/9481; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/46; B01J35/00; B01J35/30; B01J35/33; B01J35/50; B01J35/56; B01J35/57; F; F01; F01N; F01N13/00; F01N13/009; F01N3/00; F01N3/08; F01N3/0807; F01N3/0814; F01N3/0828; F01N3/0835; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/2026; F01N3/24; F01N3/28; F01N3/2803; H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/141; B01J2229/00; B01J2229/30; B01J2229/42; F01N2240/00; F01N2240/16; F01N2250/00; F01N2250/12; F01N2330/00; F01N2330/02; F01N2330/06; F01N2330/14; F01N2370/00; F01N2370/02; F01N2370/04; F01N2370/22; F01N2370/24; F01N2510/00; F01N2510/06; F01N2510/063; F01N2570/00; F01N2570/16; F01N3/30; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
59 words
A heater comprising (a) a honeycomb structure having a number of passages, (b) an adsorbent mainly composed of zeolite, 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.
Claim 2
Dependent Claim
71 words
A heater comprising (a) a honeycomb structure having a number of passages, (b) an adsorbent-catalyst composition coated on the honeycomb structure, comprising an adsorbent composed mainly of zeolite and a catalyst component supported on the adsorbent 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.
Claim 3
Dependent Claim
17 words
A heater according to Claim 1 or 2, wherein a resistance-adjusting means is provided between the electrodes.
Claim 4
Dependent Claim
13 words
A heater according to Claim 3, wherein the resistance-adjusting means is a slit.
Claim 5
Dependent Claim
23 words
A heater according to Claim 1 or 2, wherein the zeolite is a high-silica zeolite having a Si/Al ratio of 40̸ or more.
Claim 6
Dependent Claim
57 words
A heater according to Claim 2, wherein the adsorbent-catalyst composition comprises (a) a high-silica zeolite having a Si/Al ratio of 40̸ or more, ion-exchanged with at least one noble metal selected from Pt, Pd, Rh, Ir and Ru and (b) a heat-resistant oxide containing at least one noble metal selected from Pt, Pd, Rh, Ir and Ru.
Claim 7
Dependent Claim
69 words
A catalytic converter comprising at least one main monolith catalyst and a heater provided upstream or downstream of the main monolith catalyst or between the main monolith catalysts, said heater comprising (a) a honeycomb structure having a number of passages, (b) an adsorbent mainly composed of zeolite, coated on the honeycomb structure and (c) at least two electrodes for electrification of the honeycomb structure, fixed to the honeycomb structure.
Claim 8
Dependent Claim
81 words
A catalytic converter comprising at least one main monolith catalyst and a heater provided upstream or downstream of the main monolith catalyst or between the main monolith catalysts, said heater comprising (a) a honeycomb structure having a number of passages, (b) an adsorbent-catalyst composition coated on the honeycomb structure, comprising an adsorbent composed mainly of zeolite and a catalyst component supported on the adsorbent and (c) at least two electrodes for electrification of the honeycomb structure, fixed to the honeycomb structure.
Claim 9
Dependent Claim
18 words
A catalytic converter according to Claim 7 or 8, wherein a resistance-adjusting means is provided between the electrodes.
Claim 10
Dependent Claim
14 words
A catalytic converter according to Claim 9, wherein the resistance-adjusting means is a slit.
Claim 11
Dependent Claim
24 words
A catalytic converter according to Claim 7 or 8, wherein the zeolite is a high-silica zeolite having a Si/Al ratio of 40̸ or more.
Claim 12
Dependent Claim
58 words
A catalytic converter according to Claim 8, wherein the adsorbent-catalyst composition comprises (a) a high-silica zeolite having a Si/Al ratio of 40̸ or more, ion-exchanged with at least one noble metal selected from Pt, Pd, Rh, Ir and Ru and (b) a heat-resistant oxide containing at least one noble metal selected from Pt, Pd, Rh, Ir and Ru.
Claim 13
Dependent Claim
79 words
A catalytic converter for purification of automobile exhaust gas, comprising (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.
Claim 14
Dependent Claim
25 words
A catalytic converter for purification of automobile exhaust gas according to Claim 13, wherein a catalyst is supported on the adsorbent composed mainly of zeolite.
Claim 15
Dependent Claim
24 words
A catalytic converter for purification of automobile exhaust gas according to Claim 13 or 14, wherein a catalyst is supported on the honeycomb heater.
Claim 16
Dependent Claim
50 words
A catalytic converter for purification of automobile exhaust gas according to claim 13 or 14, wherein an adsorbent mainly composed of zeolite or an adsorbent-catalyst composition are supported on the honeycomb heater, the adsorbent-catalyst composition comprising an adsorbent composed mainly of zeolite and a catalyst component supported on the adsorbent.
Claim 17
Dependent Claim
28 words
A catalytic converter for purification of automobile exhaust gas according to Claim 13, wherein the main monolith catalyst is provided most downstream in the automobile exhaust gas system.
Claim 18
Dependent Claim
31 words
A catalytic converter for purification of automobile exhaust gas according to Claim 14, wherein the main monolith catalyst or the adsorbent is provided most downstream in the automobile exhaust gas system.
Claim 19
Dependent Claim
27 words
A catalytic converter for purification of automobile exhaust gas according to Claim 15, wherein the honeycomb heater is provided most downstream in the automobile exhaust gas system.
Claim 20
Dependent Claim
32 words
A catalytic converter for purification of automobile exhaust gas according to Claim 16, wherein the honeycomb heater having coated an adsorbent-catalyst composition is provided most downstream in the automobile exhaust gas system.
Claim 21
Dependent Claim
28 words
A catalytic converter for purification of automobile exhaust gas according to Claim 13 or 14, wherein a resistance-adjusting means is provided between the electrodes of the honeycomb heater.
Claim 22
Dependent Claim
30 words
A catalytic converter for purification of automobile exhaust gas according to Claim 13 or 14, wherein the zeolite is a high-silica zeolite having a Si/Al ratio of 40̸ or more.
Claim 23
Dependent Claim
70 words
A catalytic converter for purification of automobile exhaust gas according to Claim 14, wherein the catalyst supported on the adsorbent is a composition comprising (a) a high-silica zeolite having a Si/Al ratio of 40̸ or more, ion-exchanged with at least one noble metal selected from Pt, Pd, kh, Ir and Ru and (b) a heat-resistant oxide containing at least one noble metal selected from Pt, Pd, Rh, Ir and RU.
Claim 24
Dependent Claim
20 words
An adsorbent for purification of automobile exhaust gas, comprising a high-silica zeolite having a Si/Al ratio of 40̸ or more.
Claim 25
Dependent Claim
21 words
An adsorbent for purification of automobile exhaust gas according to Claim 24, wherein a catalyst component is supported on said adsorbent.
Claim 26
Dependent Claim
28 words
An adsorbent for purification of automobile exhaust gas according to Claim 24 or 25, wherein said adsorbent is coated on a honeycomb structure having a number of passages.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.