The invention concern methods for converting carbonaceous feedstock slurry into synthetic fuel gas comprising: (a) introducing a carbonaceous feed stock slurry into a first reaction vessel via a continuous feed; (b) converting said carbonaceous feed stock slurry to a carbon char slurry comprising carbon char, and water by allowing said carbonaceous feed stock slurry to have a residency time of between 5 and 30 minutes in said first reaction vessel, said carbonaceous feed stock slurry being heated to a temperature of between about 260 to about 320° C. at a pressure such that water does not flash to steam.

There is disclosed a waste treatment process for a fossil-fuel extraction site (18, 40), comprising: processing extracted waste generated by a fossil-fuel extraction process to produce primary waste having a higher calorific value than the extracted waste; mixing the primary waste with secondary waste to generate pyrolysis feedstock, the secondary waste having a lower calorific value than the primary waste; pyrolysing the pyrolysis feedstock in a pyrolysis unit (32) to form pyrolysis char; and gasifying the pyrolysis char in a gasification unit (36) to form syngas and ash.

There is disclosed a waste treatment process for a fossil-fuel extraction site (18, 40), comprising: processing extracted waste generated by a fossil-fuel extraction process to produce primary waste having a higher calorific value than the extracted waste; mixing the primary waste with secondary waste to generate pyrolysis feedstock, the secondary waste having a lower calorific value than the primary waste; pyrolysing the pyrolysis feedstock in a pyrolysis unit (32) to form pyrolysis char; and gasifying the pyrolysis char in a gasification unit (36) to form syngas and ash.

A waste incinerator, in a vertical structure and including from the top down: a drying section, a destructive distillation section, a reduction section, and a combustion section. The combustion section includes: two layers of grate bars, a first combustion layer, a second combustion layer, and a third combustion layer. The heat produced from the combustion in the combustion section is used to heat the carbide in the reduction section. The heated carbide reduces CO.sub.2 produced in the combustion into CO (coal gas). The coal gas ascends to the destructive distillation section through the ambient coal gas chamber to heat and destructively distillate the waste to produce the pyrogenic coal gas and the carbide. The carbide drops to the combustion section for combustion, and the pyrogenic coal gas and the coal gas are collected by the draft fan.

A waste incinerator, in a vertical structure and including from the top down: a drying section, a destructive distillation section, a reduction section, and a combustion section. The combustion section includes: two layers of grate bars, a first combustion layer, a second combustion layer, and a third combustion layer. The heat produced from the combustion in the combustion section is used to heat the carbide in the reduction section. The heated carbide reduces CO.sub.2 produced in the combustion into CO (coal gas). The coal gas ascends to the destructive distillation section through the ambient coal gas chamber to heat and destructively distillate the waste to produce the pyrogenic coal gas and the carbide. The carbide drops to the combustion section for combustion, and the pyrogenic coal gas and the coal gas are collected by the draft fan.

A process and apparatus for gasification of biomass. Biogenic residue may be supplied to a heating zone to dry the biomass and allow the volatile constituents to escape to generate a pyrolysis gas. The pyrolysis gas is supplied to an oxidation zone and substoichiometrically oxidized to generate a crude gas. The carbonaceous residue generated in the heating zone and the crude gas is partially gasified in a gasification zone. The gasification forms activated carbon and a hot process gas. The activated carbon and the hot process gas are conjointly cooled. The adsorption process during the conjoined cooling has the result that tar from the hot process gas is absorbed on the activated carbon in the cooling zone. A pure gas which is substantially tar-free is obtained. The tar-enriched activated carbon may be at least partly burned for heating the heating zone and/or the gasification zone.

A process and apparatus for gasification of biomass. Biogenic residue may be supplied to a heating zone to dry the biomass and allow the volatile constituents to escape to generate a pyrolysis gas. The pyrolysis gas is supplied to an oxidation zone and substoichiometrically oxidized to generate a crude gas. The carbonaceous residue generated in the heating zone and the crude gas is partially gasified in a gasification zone. The gasification forms activated carbon and a hot process gas. The activated carbon and the hot process gas are conjointly cooled. The adsorption process during the conjoined cooling has the result that tar from the hot process gas is absorbed on the activated carbon in the cooling zone. A pure gas which is substantially tar-free is obtained. The tar-enriched activated carbon may be at least partly burned for heating the heating zone and/or the gasification zone.

This invention relates to a method and a reactor for gasifying a carbonaceous feedstock material. The method includes the steps of choke-feeding a carbonaceous feedstock material into a pyrolysis zone of the reactor to form a discharge bed; heating the discharge bed to initiate pyrolysis of the feedstock material to form a pyrolysis product; providing a lower lying upper oxidation zone; gasifying the pyrolysis product to form a bed of char; converting thermal energy into chemical energy in an upper reduction zone; providing a lower lying lower oxidation zone; collecting any metal slag and/or slag melts in the lower oxidation zone; and discharging hot reducing gases having a temperature of at least 1300° C. and a CO/CO.sub.2 ratio of ≥5, more preferably ≥15.

This invention relates to a method and a reactor for gasifying a carbonaceous feedstock material. The method includes the steps of choke-feeding a carbonaceous feedstock material into a pyrolysis zone of the reactor to form a discharge bed; heating the discharge bed to initiate pyrolysis of the feedstock material to form a pyrolysis product; providing a lower lying upper oxidation zone; gasifying the pyrolysis product to form a bed of char; converting thermal energy into chemical energy in an upper reduction zone; providing a lower lying lower oxidation zone; collecting any metal slag and/or slag melts in the lower oxidation zone; and discharging hot reducing gases having a temperature of at least 1300° C. and a CO/CO.sub.2 ratio of ≥5, more preferably ≥15.

Processes and systems are provided for converting a carbonaceous feedstock into a reaction gas and a syngas, involving a step of pyrolysing and methanating the feedstock in a pyrolysis chamber to produce the reaction gas and a step of gasifying unconverted feedstock in the presence of a reactant to produce a syngas.