Exhaust gas purifier for methanol-fueled engines
AssigneeNichias Corporation
InventorsShigeo Take, Masaji Kurosawa
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Abstract
An adsorber comprising zeolite retained on structure of substantially inorganic fibers disposed in the exhaust gas stream of an engine. The invention has particular application to purification of exhaust gas streams of methanol fueled engines in combination with catalytic means for decomposing undesired organic matter from the exhaust gas stream. The adsorber adsorbs organic matter from the exhaust gas at relatively low exhaust gas temperatures at which the catalyst is of reduced effectiveness, and desorbs organic matter at elevated temperatures at which the catalyst is of heightened effectiveness.
Claims14
An exhaust-gas purifier for a methanol fueled engine comprising:
- an X-type zeolite adsorbent which adsorbs organic matter from the exhaust-gas ejected from the methanol-fueled engine;
- and
- a catalyst which decomposes said organic matter, the adsorbent comprising X-type zeolite impregnated into a honeycomb structure made of synthetic fibers.
An exhaust gas purifier for a methanol fueled engine comprising:
- an X-type zeolite adsorbent for adsorbing organic matter from exhaust gas ejected from the methanol-fueled engine;
- and
- enclosing means for communicating exhaust gas to the X-type zeolite adsorbent, wherein the X-type zeolite adsorbent comprises X-type zeolite impregnated into a honeycomb structure of synthetic fibers.
A methanol engine exhaust gas treating apparatus, comprising:
- an X-type zeolite containing structure for adsorbing organic matter from said exhaust gas, said X-type zeolite containing structure being disposed to receive engine exhaust gas, and
- a catalytic converter for decomposing organic matter from said exhaust gas, said catalytic converter being disposed to receive exhaust gas after the exhaust gas has been exposed to the X-type zeolite containing structure;
- wherein said X-type zeolite containing structure comprises X-type zeolite impregnated into a honeycomb structure made of synthetic fibers.
A method of treating exhaust gas of a methanol-fueled engine, comprising the steps of:
- exposing the exhaust gas to an X-type zeolite adsorbent impregnated into a honeycomb structure made of synthetic fibers to adsorb organic matter from the exhaust gas;
- and
- after exposing the exhaust gas to the X-type zeolite adsorbent, exposing the exhaust gas to a catalyst to decompose organic matter in the exhaust gas,
- the X-type zeolite adsorbent tending to adsorb organic matter at relatively lower engine exhaust operating temperatures and tending to desorb previously adsorbed organic matter at relatively higher engine exhaust operating temperatures.
A process for purifying methanol engine exhaust gas comprising the steps of:
- exposing said gas to an X-type zeolite impregnated into a honeycomb structure of synthetic fibers, and
- then exposing said gas to a catalyst for decomposing organic compounds in said gas.
A method of treating exhaust gas from a methanol-fueled engine by passing it through:
- a first container having an exhaust gas flowpath and containing an X-type zeolite having a water saturated adsorption at 100.degree. C. of at least about 5 g of water per 100 g of zeolite under a water vapor partial pressure of 10 mm Hg disposed in the exhaust gas flowpath of the first container such that the X-type zeolite is impregnated into a honeycomb structure of synthetic fibers,
- the first container connected to a second container such that exhaust exiting the first container passes into the second container,
- the second container having an exhaust gas flowpath therein and having a catalyst disposed in the exhaust gas flowpath of the second container which decomposes organic matter in the exhaust gas.
A controlled emissions power unit comprising:
- a methanol-fueled engine and an exhaust gas system, the exhaust gas system comprising:
- a first chamber connected to the methanol-fueled engine to receive exhaust gas from the methanol-fueled engine and having therein an X-type zeolite having a water saturated adsorption at 100.degree. C. of at least about 5 g of water per 100 g of zeolite under a water vapor partial pressure of 10 mm Hg, the zeolite disposed so as to contact exhaust gas received from the methanol-fueled engine such that the X-type zeolite is impregnated into a honeycomb structure of synthetic fibers, and
- a second chamber connected to receive exhaust gas from the first chamber and having therein a catalyst to enhance decomposition of organic matter in the exhaust gas, the catalyst disposed so as to contact exhaust gas received from the first chamber.
Dependencies are inferred from the claim text.