초록 ▼

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 resi

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.

대표청구항 ▼

A method for producing pyrolysis gases from carbon-containing materials comprising: pyrolyzing said carbon-containing materials in a gasification reactor in order to form pyrolysis gases therefrom, said pyrolysis gases having residual tar and oil byproducts entrained therein; passing said pyrolysis

A method for producing pyrolysis gases from carbon-containing materials comprising: pyrolyzing said carbon-containing materials in a gasification reactor in order to form pyrolysis gases therefrom, said pyrolysis gases having residual tar and oil byproducts entrained therein; passing said pyrolysis gases from said gasification reactor into and through a catalytic reactor having a fluidized bed therein for eliminating said tar and oil byproducts from said pyrolysis gases, said catalytic reactor being maintained at a temperature of about 550°-750°C. and containing at least one catalyst therein; and introducing a gaseous oxidizing agent selected from the group consisting of air, oxygen, steam, and mixtures thereof into said catalytic reactor, said gaseous oxidizing agent being introduced into said catalytic reactor and released into said bed of said catalytic reactor in a direction perpendicular to the longitudinal axis of said reactor, said oxidizing agent being introduced at a flow rate sufficient to impart a swirling motion to said catalyst in said catalytic reactor in order to react with any deposited carbon on said catalyst to enable the oxidation and removal of said carbon therefrom.