Preferential oxidation catalyst and process for preparing the same
OwnerMoon Chan Kim, In Hyuk Soninventors
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Abstract
Disclosed is a process for preparing a stable PROX reaction catalyst, comprising the steps of (a) preparing a catalyst platinum supported on alumina; (b) calcinating the catalyst from step (a) at 300˜600° C. for 2˜4 hours; (c) contacting the catalyst obtained from step (b) with hydrogen at 300° C.˜600° C. for 2˜4 hours to reduce the catalyst; and (d) dropping the temperature in the reduced catalyst from step (c) to less than 100° C. and then contacting the catalyst with a predetermined solvent and/or gas while elevating the temperature to 300° C.–600° C. The catalyst has Pt—Al arrangement, the content of Pt being 0.5˜7% by weight and has an overall shape of an oval.
Claims9
A process for preparing an improved stable preferential oxidation catalyst, comprising the steps of:
- (a) preparing a catalyst comprising platinum supported on alumina;
- (b) calcinating the catalyst from step (a) at a temperature in the range from 300 to 600° C. for 2 to 4 hours;
- (c) contacting the catalyst obtained from step (b) with hydrogen at a temperature in the range from 300 to 600° C. for 2 to 4 hours to reduce the catalyst;
- and
- (d) dropping the temperature in the reduced catalyst from step (c) to less than 100° C. and then contacting the catalyst with one or more solvents together with one or more gases while elevating the temperature to a temperature in the range from 300 to 600° C.
A process for preparing a preferential oxidation catalyst, comprising:
- (a) preparing a catalyst comprising platinum supported on alumina;
- (b) calcinating the catalyst from step (a) at a temperature in the range from 300 to 600° C. for 2 to 4 hours;
- (c) contacting the catalyst obtained from step (b) with hydrogen at a temperature in the range from 300 to 600° C. for 2 to 4 hours to reduce the catalyst;
- and
- (d) dropping the temperature in the reduced catalyst from step (c) to less than 100° C. and then contacting the catalyst with one or more solvents together with one or more gases while elevating the temperature to a temperature in the range from 300 to 600° C., wherein the one or more solvents used in step (d) are selected from a group consisting of water (H2O), alcohols (R—OH wherein R is an alkyl group), ammonium hydroxide (NH4OH), gasoline and hydrogen peroxide (H2O2);
- and wherein the one or more gases used in step (d) are selected from a group consisting of hydrogen (H2), oxygen (O2), ozone (O3), methane (CH4), propane (C3H8) and butane (C4H10).
Dependencies are inferred from the claim text.