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. 24, 2012
Filed:
Apr. 10, 2007
Pekka Simell, Vantaa, FI;
Esa Kurkela, Espoo, FI;
Pekka Simell, Vantaa, FI;
Esa Kurkela, Espoo, FI;
Teknologian Tutkimuskeskus VTT, Espoo, FI;
Abstract
The invention relates to a method of reforming a gas containing tarry impurities, such as the gasification gas obtained by gasifying a fuel. In the method, oxygen or an oxygenous gas () is added to a gas flow (), after which the gas is brought into contact with a solid catalyst () at a high temperature. According to the invention, the reformation takes place in stages so that, in the first pre-reforming stage, the gas is brought into contact with a zirconium-based catalyst (), such as zirconium oxide, for example, and, in the next stage, with a metal catalyst (), such as metallic nickel. The two-stage reformation is used for preventing the deactivation of the metal catalyst and the formation of carbon deposits in the reforming reactor. The invention also includes the use of the zirconium compound in pre-reforming the tar-bearing gas to achieve the said goals.