Carbon monoxide selective oxidizing catalyst and manufacturing method for the same

A carbon monoxide selective oxidizing catalyst, comprising:

• a carrier consisting essentially of at least one of ferrierite particles and ZSM-5 particles, said ferrierite particles and said ZSM-5 particles having a largest pore having a maximum pore diameter in a range of from 0.55 nm to 0.65 nm;
• and
• a metal component that is supported on the carrier and that includes a component chosen from the group consisting of (a) platinum (Pt) alone and (b) platinum (Pt) and at least one type of transition metal;
• when the carbon monoxide selective oxidizing catalyst receives a supply of a hydrogen-rich gas containing carbon monoxide, the carbon monoxide selective oxidizing catalyst promotes a carbon monoxide selective oxidizing reaction that oxidizes carbon monoxide by giving carbon monoxide priority over hydrogen.

A carbon monoxide selective oxidizing catalyst that receives a supply of a hydrogen-rich gas containing carbon monoxide and promotes a carbon monoxide selective oxidizing reaction that oxidizes carbon monoxide by giving carbon monoxide priority over hydrogen, wherein

• the carbon monoxide selective oxidizing catalyst is provided with a metal component that is supported on the carrier and that includes a component chosen from the group consisting of (a) platinum (Pt) alone and (b) platinum (Pt) and at least one type of transition metal, and the carbon monoxide selective oxidizing catalyst achieves a carbon monoxide reduction rate of 90% or higher when the carbon monoxide selective oxidizing reaction is performed under following conditions (a) through (c):
• (a) contents of components other than hydrogen in the hydrogen-rich gas are as follows:
• a carbon monoxide concentration is about 5000 ppm;
• a carbon dioxide concentration is about 25%;
• and an oxygen content is such that a molar ratio value between oxygen atoms and carbon monoxide molecules ([O]/[CO]) is 1;
• (b) a space velocity is about 22000 h−1 when the hydrogen-rich gas is supplied onto the carbon monoxide selective oxidizing catalyst;
• and
• (c) a reaction temperature is 130° C.;
• and wherein
• the carbon monoxide selective oxidizing catalyst further comprises a carrier consisting essentially of at least one of ferrierite particles and ZSM-5 particles, and said ferrierite particles and said ZSM-5 particles having a largest pore having a maximum pore diameter in a range of from 0.55 nm to 0.65 nm.

A method of manufacturing a carbon monoxide selective oxidizing catalyst that receives a supply of a hydrogen-rich gas containing carbon monoxide and promotes a carbon monoxide selective oxidizing reaction that oxidizes carbon monoxide by giving carbon monoxide priority over hydrogen, comprising:

• selecting particles of at least one of ferrierite particles and ZSM-5 particles, said ferrierite particles and said ZSM-5 particles having a largest pore having a maximum pore diameter in a range of from 0.55 nm to 0.65 nm;
• and
• preparing a carrier consisting essentially of the selected particles;
• and
• supporting on the prepared carrier a metal component that is supported on the carrier and that includes a component chosen from the group consisting of (a) platinum (Pt) alone and (b) platinum (Pt) and at least one type of transition metal.

A manufacturing method for a carbon monoxide selective oxidizing catalyst that receives a supply of a hydrogen-rich gas containing carbon monoxide and promotes a carbon monoxide selective oxidizing reaction that oxidizes carbon monoxide by giving carbon monoxide priority over hydrogen, comprising:

• selecting particles of at least one of ferrierite particles and ZSM-5 particles, said ferrierite particles and said ZSM-5 particles having a largest pore having a maximum pore diameter in a range of from 0.55 nm to 0.65 nm;
• and
• preparing a carrier consisting essentially of the selected particles;
• and
• supporting on the prepared carrier a metal component that includes a component chosen from the group consisting of (a) platinum (Pt) alone and (b) platinum (Pt) and at least one type of transition metal.

A process for reducing carbon monoxide in a reformed gas, comprising:

• providing a reformed gas including carbon monoxide;
• and
• selectively oxidizing said carbon monoxide with a carbon monoxide selective oxidizing catalyst;
• wherein said carbon monoxide selective oxidizing catalyst comprises:
• a carrier consisting essentially of at least one of ferrierite particles and ZSM-5 particles, said ferrierite particles and said ZSM-5 particles having a largest pore having a maximum pore diameter in a range of from 0.55 nm to 0.65 nm;
• a metal component supported on said carrier, the metal component that includes a component chosen from the group consisting of (a) platinum (Pt) alone and (b) platinum (Pt) and at least one type of transition metal, and said transition metal is at least one type of metal chosen from the group consisting of iron (Fe) and cobalt (Co).