A solids circulation system receives a gas stream containing char or other reacting solids from a first reactor. The solids circulation system includes a cyclone configured to receive the gas stream from the first reactor, a dipleg from the cyclone to a second reactor, and a riser from the second reactor which merges with the gas stream received by the cyclone. The second reactor has a dense fluid bed and converts the received materials to gaseous products. A conveying fluid transports a portion of the bed media from the second reactor through the riser to mix with the gas stream prior to cyclone entry. The bed media helps manipulate the solids that is received by the cyclone to facilitate flow of solids down the dipleg into the second reactor. The second reactor provides additional residence time, mixing and gas-solid contact for efficient conversion of char or reacting solids.

A solids circulation system receives a gas stream containing char or other reacting solids from a first reactor. The solids circulation system includes a cyclone configured to receive the gas stream from the first reactor, a dipleg from the cyclone to a second reactor, and a riser from the second reactor which merges with the gas stream received by the cyclone. The second reactor has a dense fluid bed and converts the received materials to gaseous products. A conveying fluid transports a portion of the bed media from the second reactor through the riser to mix with the gas stream prior to cyclone entry. The bed media helps manipulate the solids that is received by the cyclone to facilitate flow of solids down the dipleg into the second reactor. The second reactor provides additional residence time, mixing and gas-solid contact for efficient conversion of char or reacting solids.

This invention provides a system (10) for generating energy from waste material. The system comprises a first batch processing oven (12) for generating syngas and a second batch processing oven (14) for generating syngas. At least one thermal treatment chamber (20) heats the syngas after it is produced, and an energy converter (22) converts energy from the syngas to electrical energy.

Methods and systems are described for improving the efficiency and reducing the carbon intensity of transportation fuels produced from heavy oil extracted with the steam injection process, by replacing natural gas from fossil fuel sources with a substitute renewable gas produced from solid carbonaceous materials while co-producing a solid carbonaceous byproduct.

The present invention provides a process for the manufacture of a synthetic fuel comprising gasifying a carbonaceous feedstock comprising waste materials and/or biomass to generate a raw synthesis gas; supplying the raw synthesis gas to a primary clean-up zone to wash particulates and ammonia or HCl out of the raw synthesis gas; contacting the synthesis gas in a secondary clean-up zone with a physical solvent for sulphurous materials; contacting the desulphurised raw synthesis gas in a tertiary clean-up zone with a physical solvent for CO.sub.2 effective to absorb CO.sub.2; removing at least part of the absorbed CO.sub.2 in a solvent regeneration stage to recover CO.sub.2 in a form sufficiently pure for sequestration or other use; and supplying the clean synthesis gas to a further reaction train to generate a synthetic fuel.

A gasification system includes a gasifier configured to gasify a feedstock and an oxidant to generate a producer gas, a steam generator configured to supply steam to the gasifier, and a combustion system configured to supply an exhaust gas to the steam generator to produce the steam. The system also includes an exhaust gas injection system located upstream of the gasifier and fluidly coupled to the gasifier. The exhaust gas injection system is configured to supply a portion of the exhaust gas from the combustion system to the gasifier.

A system for cogenerating gas-steam based on gasification and methanation of biomass, the system including a gasification unit, a shift unit, a purification unit, a methanation unit, and a methane concentration unit. A waste heat boiler is provided in an upper part of a gasifier of the gasification unit. The methanation unit includes a first primary methanation reactor, a second primary methanation reactor, a first secondary methanation reactor, and a second secondary methanation reactor connected in series. An outlet of the second primary methanation reactor is provided with two bypasses, one of which is connected to an inlet of the first primary methanation reactor, the other of which is connected to the first secondary methanation reactor. The second secondary methanation reactor is connected to the methane concentration unit.

Disclosed is a biomass gasification and waste incineration integrated furnace, which relates to the technical field of biomass gasification and waste incineration, and includes a waste incineration furnace chamber and a biomass gasification furnace chamber. A mutual contact region exists between the waste incineration furnace chamber and the biomass gasification furnace chamber, and heat transfer can be realized between the waste incineration furnace chamber and the biomass gasification furnace chamber. Heat generated by the waste incineration furnace chamber is used for conduction to the biomass gasification furnace chamber, and excess heat generated by the waste incineration can be supplied to the biomass gasification furnace chamber for reactions therein, thereby reducing the heat additionally used by the biomass gasification furnace chamber and saving energy consumption.

A mixing apparatus for producing a feedstock for a reformer, the mixing apparatus including at least one mixing vessel comprising a cylindrical vessel with a conical bottom; a steam inlet configured for introducing steam into the conical bottom; a carbonaceous material inlet configured for introducing a carbonaceous feed into the cylindrical vessel; and an outlet for a reformer feedstock comprising at least 0.3 pounds of steam per pound of carbonaceous material, with the at least one mixing vessel configured for operation at a pressure of greater than about 10 psig.

A system and process for the gasification of waste, particularly household waste, in an apparatus comprising a gasification system for waste treatment and gasifier.