Abstract:
The present disclosure is generally directed to process of gasification of carbonaceous materials to produce synthesis gas or syngas. The present disclosure provides improved methods of gasification comprising adding a molecular oxygen-containing gas and optionally adding water into said gasifier. This disclosure is also directed to process of production of one or more alcohols from said syngas via fermentation or digestion in the presence of at least one microorganism.
Abstract:
The present invention provides a system that recycles heat recovered from hot products of a carbonaceous feedstock gasification process back into the gasification process. The hot gaseous products are used to heat working fluids such as air and water to produce hot air, hot water or steam. The heated fluids are used to return heat back to the gasification process. The system also comprises a control system to optimize the efficiency of a gasification process by minimizing energy consumption of the process, while also maximizing energy production.
Abstract:
A solid fuel gasifier includes first wall structure (12) defining a gasification chamber (14) and means (50, 52) to collect particulate solid residue from gasification in the gasification chamber. Second wall structure (16) defines a gas combustion chamber (17) and means (19) is arranged for admitting a flow of hot gases from the gasification chamber to the gas combustion chamber as combustion takes place. Also provided is means (178, 170) to conduct hot gases from the gasification chamber and/or gas combustion chamber into thermal contact with said collected particulate solid residue, for facilitating post-combustion and/or post-reduction of the solid residue. Also disclosed are an agitator bed (52, 182) for fine particulate material, and a method of gasification of solid fuel.
Abstract:
A down-draft gasification reactor has a solids storage chamber bordered from below by a grate and having an oxidation zone, a product gas collection region disposed beneath the grate, a product gas line for discharging out-gassed product gas from the product gas collection region, a slag-separation device disposed above the grate, and a discharge mechanism downstream of the grate for transporting the separated slag out of the reactor.
Abstract:
A process and apparatus for gasification of organic materials (typically incorporated in domestic and industrial wastes, including auto shredder residues) to produce useful synthesis gas (with a major content CO and H.sub.2) with effectively non-toxic ash residue by means of at least one continuously operated burner, preferably stoichiometrically balanced (1:2 for natural gas/oxygen) at least at startup and shut down (optionally with some excess of oxygen, usually under steady-state conditions, such as at a ratio of 1:4 or higher, especially if the charge has well over 18% water content), directed into a primary single stage reaction zone (through an opening in common with the effluent product gas discharged therefrom such as to assure intimate contact therebetween), which zone contains a tumbling charge in a rotating barrel-shaped horizontal reactor thus heated to from about 650.degree. to about 800.degree. C. (below the incipient fusion temperature of the charge) and controlled to remain in such temperature range (by adjustment of the burner volume and fuel-to-oxygen ratio for any given charge) resulting in thermally cracking and gasifying the organic materials in the charge and reacting the complex hydrocarbons and gas evolved (1) normally with the CO.sub.2 and H.sub.2 O derived from burner combustion of a fuel and oxygen-containing gas at a high flame temperature, typically 2500.degree. to 3000.degree. C., (2) with excess oxygen, and/or (3) partially with H.sub.2 O or CO.sub.2 otherwise added to or, present in, the charge.
Abstract:
Coal is processed first through a moving bed reactor and then through a fixed bed reactor. Hot carbonized coal char is fed from the first stage reactor to the second stage reactor via a lock hopper and gas is taken off from the reactors either in separate streams or in a common stream.
Abstract:
A SYSTEM IS DISCLOSED FOR RECOVERING OIL FROM OIL BEARING SHALE ROCK IN WHICH THE ROCK IS SCREENED TO SEPARATE FINES FROM LARGER PARTICLES HAVING A DIMENSION OF AT LEAST ABOUT 1/4 INCH. THE SYSTEM INCLUDES A RETORTING ZONE IN WHICH HEATED GASES, REDUCING OR NEUTRAL, ARE PASSED THROUGH THE LARGER PARTICLES AND AGGLOMERATES OF THE FINES TO HEAT THESE PARTICLES AND AGGLOMERATES TO OIL EDUCING TEMPERATURE AND AFTER WHICH THE GASES, THEN CONTAINING EDUCTED OIL, ARE PASSED THROUGH A ZONE IN WHICH PARTICLES AND AGGLOMERATES ARE PREHEATED AND THE GASES COOLED TO CONDENSE THE OIL TO SMALL DROPLETS AND VAPOR IN THE GASES THE OIL IS SEPARATED FROM THE GASES AND INTO VARIOUS FRACTIONS. THE HEAVIEST FRACTION OF THE OIL, REPRESENTING AN AMOUNT IN A RANGE OF FROM ABOUT 5% TO 50% OF THE TOTAL OIL EDUCTED, ARE RECIRCULATED THROUGH THE SYSTEM BY USING SUCH OIL AS BINDER TO AGGLOMERATE THE FINES INTO AGGLOMERATES AT LEAST 1/4 INCH. THESE AGGLOMERATES MAY DBE ADVANTAGEOUSLY UTILIZED BY CHARGING THEM TO A TRAVELING GRATE APPARATUS WITH THE LARGER PARTICLES TO FORM A BED, WITH THE AGGLOMERATES FORMING AN INTERMEDIATE LAYER BETWEEN UPPER AND LOWER LAYERS OF THE LARGER PARTICLES. THE LARGER PARTICLES WILL, IN A PREHEATING-CONDENSING ZONE, TRAP AND PREVNET ESCAPE FROM THE BED, DUST AND DROPS OF HEAVY BINDER OIL (WHICH MAY ESCAPE FROM AGGLOMATES). WITH EITHER AN UPFLOW OR DOWNFLOW OF GAS IN THIS PREHEATING-CONDENSING ZONE, HEAVY BINDER OIL ATTEMPTING TO ESCAPE THE BED WILL ADHERE TO AND COAT PARTICLES IN THE UPPER OR LOWER LAYERS AND DUST ATTEMPTING TO ESCAPE THE BED WILL ADHERE TO THE LARGER PARTICLES COATED BY THE HEAVY BINDER OIL. THUS, BOTH THE HEAVY BINDER OIL AND DUST ATTEMPTING TO ESCAPE IN THIS PREHEATING-CONDENSING ZONE WILL BE TRAPPED IN THE BED. IN THE RETORTING ZONE SUCH HEAVY FRACTION BINDER OIL RETAINED IN THE BED WILL PYROLYZE TO PRODUCE FURTHER USEFUL LIGHTER OIL WHICH WILL LEAVE THE BED AS VAPOR, AND RESIDUAL COKE WHICH WILL REMAIN IN THE BED.
Abstract:
A method and process is described for producing negative carbon fuel. In its broadest form, a carbon-containing input is converted to combustible fuels, refinery feedstock, or chemicals and a carbonaceous solid concurrently in separate and substantially uncontaminated form. In an embodiment of the invention, biomass is converted via discrete increasing temperatures under pressure to blendable combustible fuels and a carbonaceous solid. The carbonaceous solid may be reacted to synthesis gas, sold as charcoal product, carbon credits, used for carbon offsets, or sequestered.
Abstract:
A process provides for reducing agglomerate formation during thermal decomposition of a carbonaceous material feedstock. A non-catalytic thermal decomposition process includes providing generally solid feedstock to a thermal decomposition unit and moving the feedstock through at least one gasification zone in the thermal decomposition unit with a moving device. The process includes providing oxygen and optionally an additional gas to the gasification zone. In one aspect, the process includes moving feedstock through the gasification zone and providing oxygen to the gasification zone at rates effective for maintaining a material bed temperature not exceeding about 2300° F. at any point in the material bed, and for maintaining a material bed temperature of about 500° F. to about 2000° F.