Texaco Inc.

William L Slater

George N Richter

Warren G Schlinger

William B Crouch

Lawrence E Estabrook

Warren C Schlinger

A method is provided for turning down from design conditions or below the output of raw product gas from a free-flow partial oxidation gas generator, or when operating below design conditions the output of raw product gas from the gas generator may be turned up while maintaining substantially constant the efficiency of the gas generation, or conversion of the fuel to gas, and the quality of the gas produced. The flow rates of the feedstreams to the burner are adjusted down or up a predetermined amount for each of the feedstreams to the burner to obtain a specified output of raw product gas while maintaining substantially constant in the reaction zone the levels of O/C atomic ratio and the H.sub.2 O/fuel weight ratio. Further, a pressure adjustment in the system is made which produces a corresponding adjustment to the pressure in the gas generator. The adjusted pressure is a direct function of the adjusted flow rate for the adjusted fuel or oxidant feedstream.

Process for operating a gas generator

A process for conversion of hydrogen and carbon monoxide into hydrocarbons in the presence of an ebullient bed of catalyst comprising reduced iron oxide containing an amount of potassium equivalent to 2 to 10 pounds potassium carbonate per 1000 pounds iron oxide catalyst, and having an average particle size in the range of 100-1000 microns. The catalyst may be sulfided for increasing the yield of C.sub.1 -C.sub.4 range hydrocarbons.

Conversion of hydrogen and carbon monoxide into C.sub.1 -C.sub.4 range

A process for conversion of hydrogen and carbon monoxide into hydrocarbons in the presence of an ebullient bed of catalyst comprising reduced iron oxide promoted with potassium equivalent to 2-10 pounds potassium carbonate per 1000 pounds iron oxide catalyst, and having an average particle size in the range of 100-1000 microns, wherein the catalyst is chlorided for increasing the yield of C.sub.1 -C.sub.4 range hydrocarbons.

Catalysts comprising halogenated, reduced iron oxide-potassium carbonate

Catalyst for conversion of hydrogen and carbon monoxide into C.sub.1 -C.sub

Low quality solid fuels are gasified by being fed to a gasifier in a concentrated water slurry, the high solids content of the slurry being possible by subjecting the solid fuel to hydrothermal treatment in the product gas quench zone.

Gasification of low quality solid fuels

A continuous process for producing simultaneously a stream of cooled clean synthesis gas, reducing gas, or fuel gas and a separate stream of superheated steam. In the subject process a hydrocarbonaceous fuel is reacted with a free-oxygen containing gas by partial oxidation in the reaction zone of a free-flow noncatalytic gas generator. The effluent gas stream from the reaction zone is quenched in water in a quench zone and further cooled by being passed serially through first and second heat exchange zones to produce a product gas stream of cooled clean synthesis gas, fuel, or reducing gas. Simultaneously, a stream of boiler feed water is converted into superheated steam by stepwise sequential indirect heat exchange with the following sources of heat: first with a stream of carbon-quench water dispersion from said quench zone, second with said effluent gas stream in said second heat exchange zone, and third with the effluent gas stream in said first heat exchange zone. Optionally, the process gas stream may be cooled further, scrubbed with water, passed through a separating zone to remove entrained water, and expanded in a gas turbine for the production of mechanical or electrical energy.

Partial oxidation process

An improved continuous partial oxidation process for producing clean synthesis or fuel gas from a hydrocarbonaceous fuel feed is disclosed wherein hot gases from the process are simultaneously cooled and cleaned by direct contact with hydrocarbon oil. Thus, the effluent gas stream from the reaction zone of the gas generator is cooled and cleaned by discharging the gas stream directly into a relatively large body of hot liquid hydrocarbon immersion fluid. For example, the immersion fluid may be a dispserion of liquid hydrocarbonaceous fuel such as petroleum oil and particulate carbon which is contained in a separate immersion vessel. A portion of the immersion fluid is continuously removed from the immersion vessel and is cooled in an external cooler to a temperature in the range of about 300 to 850.degree. F but above the dew point of the water in the process gas stream. Portions of the cooled immersion fluid optionally in admixture with scrubbing fluid obtained subsequently in the process are recycled to the immersion vessel, and optionally to the gas generator as at least a portion of the hydrocarbonaceous fuel feed. In another emnbodiment, a portion of the immersion fluid removed from the immersion vessel may be introduced into the gas generator as at least a portion of the feed without first being passed through a cooler. The effluent gas stream leaving said immersion zone may be subjected to additional cleaning by being scrubbed with said scrubbing fluid comprising make-up hydrocarbonaceous fuel and particulate carbon in a separate scrubbing zone. The clean product gas comprises H.sub.2, CO, CO.sub.2, H.sub.2 O and, optionally at least one material from the group H.sub.2 S, COS, N.sub.2, A, and C.sub.1 - C.sub.10 hydrocarbons.

Production of clean synthesis or fuel gas

An improved continuous partial oxidation process for producing clean synthesis or fuel gas and by-product steam from a hydrocarbonaceous fuel feed is disclosed wherein hot gases from the process are simultaneously cooled and cleaned by direct contact with hydrocarbon oil. Thus, the effluent gas stream from the reaction zone of the gas generator is cooled and cleaned by discharging the gas stream directly into a relatively large body of hot liquid hydrocarbon immersion fluid. For example, the immersion fluid may be a dispersion of liquid hydrocarbonaceous fuel such as petroleum oil and particulate carbon which is contained in a separate immersion vessel. A portion of the hot immersion fluid is continuously removed from the immersion vessel and cooled to a temperature in the range of about 300.degree. to 850.degree. F. but above the dew point of the water in the process gas stream in an external heat exchanger, such as a steam generator. High pressure by-product steam may be produced thereby. A portion of the cooled immersion fluid, optionally in admixture with a hydrocarbonaceous scrubbing fluid of a similar composition obtained subsequently in the process may be recycled to the immersion vessel and optionally to the gas generator as at least a portion of the hydrocarbonaceous fuel feed.

Production of a gas suitable for use as a fuel or for conversion into a fuel and simultaneous production of a gas saturated with steam suitable for use as feed to a shift conversion zone.

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La Habra, CA, United States of America

William L Slater