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Title: Vacuum-insulated catalytic converter

Abstract

A catalytic converter has an inner canister that contains catalyst-coated substrates and an outer canister that encloses an annular, variable vacuum insulation chamber surrounding the inner canister. An annular tank containing phase-change material for heat storage and release is positioned in the variable vacuum insulation chamber a distance spaced part from the inner canister. A reversible hydrogen getter in the variable vacuum insulation chamber, preferably on a surface of the heat storage tank, releases hydrogen into the variable vacuum insulation chamber to conduct heat when the phase-change material is hot and absorbs the hydrogen to limit heat transfer to radiation when the phase-change material is cool. A porous zeolite trap in the inner canister absorbs and retains hydrocarbons from the exhaust gases when the catalyst-coated substrates and zeolite trap are cold and releases the hydrocarbons for reaction on the catalyst-coated substrate when the zeolite trap and catalyst-coated substrate get hot.

Inventors:
 [1]
  1. Golden, CO
Issue Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States)
OSTI Identifier:
873613
Patent Number(s):
6203764
Assignee:
Midwest Research Institute (Kansas City, MO)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
AC36-98GO10337
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
vacuum-insulated; catalytic; converter; inner; canister; contains; catalyst-coated; substrates; outer; encloses; annular; variable; vacuum; insulation; chamber; surrounding; tank; containing; phase-change; material; heat; storage; release; positioned; distance; spaced; reversible; hydrogen; getter; preferably; surface; releases; conduct; hot; absorbs; limit; transfer; radiation; cool; porous; zeolite; trap; retains; hydrocarbons; exhaust; gases; cold; reaction; substrate; catalytic converter; coated substrates; tank containing; vacuum insulation; heat storage; storage tank; change material; exhaust gases; heat transfer; hydrogen getter; exhaust gas; coated substrate; phase-change material; reversible hydrogen; inner canister; conduct heat; /422/

Citation Formats

Benson, David K. Vacuum-insulated catalytic converter. United States: N. p., 2001. Web.
Benson, David K. Vacuum-insulated catalytic converter. United States.
Benson, David K. Mon . "Vacuum-insulated catalytic converter". United States. https://www.osti.gov/servlets/purl/873613.
@article{osti_873613,
title = {Vacuum-insulated catalytic converter},
author = {Benson, David K},
abstractNote = {A catalytic converter has an inner canister that contains catalyst-coated substrates and an outer canister that encloses an annular, variable vacuum insulation chamber surrounding the inner canister. An annular tank containing phase-change material for heat storage and release is positioned in the variable vacuum insulation chamber a distance spaced part from the inner canister. A reversible hydrogen getter in the variable vacuum insulation chamber, preferably on a surface of the heat storage tank, releases hydrogen into the variable vacuum insulation chamber to conduct heat when the phase-change material is hot and absorbs the hydrogen to limit heat transfer to radiation when the phase-change material is cool. A porous zeolite trap in the inner canister absorbs and retains hydrocarbons from the exhaust gases when the catalyst-coated substrates and zeolite trap are cold and releases the hydrocarbons for reaction on the catalyst-coated substrate when the zeolite trap and catalyst-coated substrate get hot.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}