Carbon monoxide selective oxidizing catalyst and manufacturing method for the same

A carbon monoxide concentration reduction apparatus apparatus, comprising:

• a hydrogen-rich gas supply that supplies the hydrogen-rich gas;
• an oxygen supply that supplies oxygen used for oxidizing the carbon monoxide;
• a carbon monoxide selective oxidizing catalyst, comprising
• a carrier consisting of ferrierite and/or ZSM-5, the carrier comprising pores having a maximum allowable pore diameter of 0.65 nanometers (nm);
• and
• a metal component supported on the carrier, wherein
• 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 the carbon monoxide by giving the carbon monoxide priority over hydrogen;
• and
• a carbon monoxide selective oxidizing reactor that includes the carbon monoxide selective oxidizing catalyst and receives a supply of the hydrogen-rich gas and the oxygen from the hydrogen-rich gas supply and the oxygen supply, respectively, to selectively oxidize carbon monoxide contained in the hydrogen-rich gas through the carbon monoxide selective oxidizing reaction, wherein
• the carbon monoxide concentration reduction apparatus oxidizes the carbon monoxide contained in the hydrogen-rich gas, thereby reducing a carbon monoxide concentration in the hydrogen-rich gas;
• the metal component includes platinum (Pt) and at least one type of transition metal, and achieves a carbon monoxide reduction rate of at least 90% when the carbon monoxide selective oxidizing reaction is performed under 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 22000h31 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 transition metal is at least one type of metal selected from the group consisting of cobalt (Co), manganese (Mn), chromium (Cr), and iridium (Ir).

A carbon monoxide concentration reduction apparatus apparatus, comprising:

• a hydrogen-rich gas supply that supplies the hydrogen-rich gas;
• an oxygen supply that supplies oxygen used for oxidizing the carbon monoxide;
• a carbon monoxide selective oxidizing catalyst, comprising
• a carrier, the carrier comprising pores having a maximum allowable pore diameter of 0.65 nanometers (nm);
• and
• a metal component supported on the carrier and which includes one of platinum (Pt) alone and platinum (Pt) and at least one type of transition metal, wherein
• 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 the carbon monoxide by giving the carbon monoxide priority over hydrogen;
• and
• a carbon monoxide selective oxidizing reactor that includes the carbon monoxide selective oxidizing catalyst and receives a supply of the hydrogen-rich gas and the oxygen from the hydrogen-rich gas supply and the oxygen supply, respectively, to selectively oxidize carbon monoxide contained in the hydrogen-rich gas through the carbon monoxide selective oxidizing reaction, wherein
• the carbon monoxide concentration reduction apparatus oxidizes the carbon monoxide contained in the hydrogen-rich gas, thereby reducing a carbon monoxide concentration in the hydrogen-rich gas;
• the carrier consists of ZSM-5;
• and
• the transition metal is at least one type of metal selected from the group consisting of cobalt (Co), manganese (Mn), chromium (Cr), and iridium (Ir).