Catalytic device with internal heat exchange

a technology of heat exchange and catalytic device, which is applied in the direction of fuel cell auxiliaries, exhaust treatment, metal/metal-oxide/metal-hydroxide catalysts, etc., can solve the problems of significant disadvantage in the connection of electric coils, and the electric energy use is affected, so as to reduce or control the heat exchange, reduce or control the effect of heat exchang
US20060048501A1Inactive Publication Date: 2006-03-09RECCAT
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
RECCAT
Publication Date
2006-03-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a catalytic device with internal heat exchange that among other things can be used for vehicles with an internal combustion engine or for stationary engines where there is a certain amount of unburned gas components in the exhaust that can be converted in the catalyst. By the invention it is obtained that the maximum temperature in the catalyst is always nearly constant whatever the inlet temperature. Hereby, the catalyst can be designed to work at a very specific temperature, by which it is possible, partly to ensure a better and safer burnout of the unburned components, and partly to save expenses for catalyst materials. The exhaust gas is guided through the catalyst by at least three passage sections that have a mutual internal heat exchange. In the main reaction passage section there are catalytic materials of one or several kinds, in which the gas can react, and in which the gases heat exchange with the succeeding main heat transfer passage section passage.
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Description

BACKGROUND OF THE INVENTION

[0001] The invention relates to a method for treatment of a fluid quantity including chemical reacting means such as combustible materials and a catalytic device according to the preamble of claim 5.

[0002] Most of the known catalysts for cleaning of exhaust gasses from internal combustion engines contain no internal heat exchange. This means that the maximum temperature in the catalyst depends on the inlet temperature in said catalyst. If the unburned gas components by combustion e.g. can increase the temperature in the catalyst by 200° C. an inlet temperature of 300° C. will result in a maximum temperature of 500° C., an inlet temperature of 400° C. will result in a maximum temperature of 600° C., etc. However, an inlet temperature of 200° C. does not necessarily result in a maximum temperature of 400° C. as the temperature at that time is too low for the reactions to take place and the catalyst will be wholly or partly inactive.

[0003] However, catalys...

Claims

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