Method of producing pyrolysis gases from carbon-containing materials
US4865625A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | May 2, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2200/158
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A gasification process of improved efficiency is disclosed. A dual bed reactor system is used in which carbon-containing feedstock materials are first treated in a gasification reactor to form pyrolysis gases. The pyrolysis gases are then directed into a catalytic reactor for the destruction of residual tars/oils in the gases. Temperatures are maintained within the catalytic reactor at a level sufficient to crack the tars/oils in the gases, while avoiding thermal breakdown of the catalysts. In order to minimize problems associated with the deposition of carbon-containing materials on the catalysts during cracking, a gaseous oxidizing agent preferably consisting of air, oxygen, steam, and/or mixtures thereof is introduced into the catalytic reactor at a high flow rate in a direction perpendicular to the longitudinal axis of the reactor. This oxidizes any carbon deposits on the catalysts, which would normally cause catalyst deactivation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.