Claims
- 1. A method for converting emissions from a combustion chamber comprising:
- (a) providing (i) a source of three-way metal catalysts containing one or more metals selected from the group consisting of Group VIIA metals and Group VIIIA metals, (ii) a combustion system, and (iii) a catalyst collector;
- (b) monitoring a plurality of system conditions selected from the group consisting of the air intake temperature of the combustion system, the catalyst source temperature, the catalyst collector temperature, and the engine speed;
- (c) in response to the monitored system conditions, adding the metal catalysts to the combustion system upstream of the combustion chamber at a controlled rate and amount;
- (d) transporting the metal catalysts to the catalyst collector located downstream of the combustion chamber;
- (e) depositing the metal catalysts by adsorption onto a surface in the catalyst collector; and
- (f) converting emissions from the combustion chamber by contacting the emissions and the deposited metal catalysts in the collector such that three-way catalytic reactions are carried out in the collector to oxidize carbon monoxide and unburned hydrocarbons and to reduce nitrogen oxides.
- 2. A method according to claim 1 wherein the catalyst source contains at least two catalyst metals.
- 3. A method according to claim 1 wherein the metals are selected from the group consisting of one or more of Pt, Rh, Re.
- 4. A method according to claim 3 wherein the metals are present in compounds selected from the group consisting of one or more of H.sub.2 PtCl.sub.6.6H.sub.2 O, LiReO.sub.4, Re.sub.2 O.sub.7, and RhCl.sub.3.4H.sub.2 O.
Parent Case Info
This is a continuation of application Ser. No. 07/841,357, filed Feb. 25, 1992, entitled CATALYTIC SYSTEM, now abandoned.
US Referenced Citations (73)
Foreign Referenced Citations (1)
Number |
Date |
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942055 |
Nov 1963 |
GBX |
Continuations (1)
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Number |
Date |
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Parent |
841357 |
Feb 1992 |
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