The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2012
Filed:
Apr. 02, 2008
Kozo Takatsu, Chiba, JP;
Yoshimi Kawashima, Chiba, JP;
Satoshi Nakai, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a catalyst precursor substance containing copper, zinc, and aluminum and exhibiting an X-ray diffraction pattern having a broad peak at a specific interplanar spacing d (Å). The present invention also provides a method for producing the catalyst precursor substance by mixing a solution containing a copper salt, a zinc salt, and an aluminum salt with a solution containing an alkali metal hydroxide or an alkaline earth metal hydroxide, thereby forming a precipitate. In the present invention, a catalyst is prepared through calcining of the catalyst precursor; the catalyst is employed for water gas shift reaction; and carbon monoxide conversion is carried out by use of the catalyst. Thus, the present invention also provides a catalyst useful for water gas shift reaction, which exhibits high activity and durability and which, even when applied to a fuel cell, can be used for a long period of time with reduction in activity being suppressed; a carbon monoxide conversion method employing the catalyst; and a fuel cell system employing hydrogen produced through the carbon monoxide conversion method.