Title:
スチームメタン改質方法
Document Type and Number:
Japanese Patent JP4977619
Kind Code:
B2
Abstract:
A steam methane reforming method in which a feed stream is treated in a reactor containing a catalyst that is capable of promoting both hydrogenation and partial oxidation reactions. The reactor is either operated in a catalytic hydrogenation mode to convert olefins into saturated hydrocarbons and/or to chemically reduce sulfur species to hydrogen sulfide or a catalytic oxidative mode utilizing oxygen and steam to prereform the feed and thus, increase the hydrogen content of a synthesis gas produced by a steam methane reformer. The method is applicable to the treatment of feed streams containing at least 15% by volume of hydrocarbons with two or more carbon atoms and/or 3% by volume of olefins, such as a refinery off-gas. In such case, the catalytic oxidative mode is conducted with a steam to carbon ratio of less than 0.5, an oxygen to carbon ratio of less than 0.25 and a reaction temperature of between about 500° C. and about 860° C. to limit the feed to the steam methane reformer to volumetric dry concentrations of less than about 0.5% for the olefins and less than about 10% for alkanes with two or more carbon atoms.
More Like This:
Inventors:
Dornevic, Raymond, Francis
Papa Basiliu, Basilis
Papa Basiliu, Basilis
Application Number:
JP2007543111A
Publication Date:
July 18, 2012
Filing Date:
November 07, 2005
Export Citation:
Assignee:
Praxair Technology Incorporated
International Classes:
C01B3/38
Domestic Patent References:
| JP49066608A | ||||
| JP53078992A | ||||
| JP61122102A | ||||
| JP6279002A | ||||
| JP2002507535A | ||||
| JP2003519616A |
Foreign References:
| US6730285 | ||||
| US6911193 | ||||
| US20040156778 | ||||
| WO2003036165A1 | ||||
| WO2003036166A1 | ||||
| WO2003066517A1 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Katsunori Ando
Yukihiro Ikeda
Hajime Asamura
Katsunori Ando
Yukihiro Ikeda