Monsanto Company

Talmage D McMinn

James C Hill

George D Davis

Charles W Rooks

This invention relates to the treatment of carbon-containing materials. In one aspect this invention relates to the treatment of carbon-containing materials, such as coal, coke and hydrocarbons to produce oxides of carbon therefrom. In still another aspect, this invention relates to a process for the production of high purity synthesis gas, a mixture of hydrogen and carbon monoxide, from carbon-containing materials. More specifically, this invention relates to inorganic metal-oxygen containing materials useful as the oxidant, oxygen carrier and supplier, and heat transfer agent for the endothermic oxidative gasification of carbon-containing materials.

Oxidants for gasifying carbon-containing materials

Carbon-containing materials are gasified to produce high purity carbon monoxide in a three zone unified system (oxidizer, reducer and gasifier) using a metal oxide as the oxygen and heat source for the gasification with carbon monoxide. Carbon monoxide contacts the metal oxide prior to the gasification to release the oxygen and convert the carbon monoxide to carbon dioxide as the gasification medium.

Conversion of carbon-containing materials to carbon monoxide

Carbon-containing materials are gasified to produce synthesis gas, a mixture of hydrogen and carbon monoxide, in a three zone unified system (oxidizer, reducer and gasifier) using a metal oxide as the oxygen and heat source for the gasification with steam and carbon dioxide. Synthesis gas contacts the metal oxide prior to the gasification to release the oxygen and convert the synthesis gas to steam and carbon dioxide as the gasification medium.

Conversion of carbon-containing materials to synthesis gas

Ammonia synthesis gas is prepared by contacting coal with air and steam in a fluidized bed. Heat for the reaction is provided by downward flowing hot char through the fluidized bed. The char is heated externally of the fluidized bed by combustion of fuel and/or a portion of the char. Control of the ratio of steam and air to the coal provides a gasification product of approximately 3 moles carbon monoxide plus hydrogen per mole of nitrogen.

Ammonia synthesis gas production

Ammonia synthesis gas is prepared by contacting coal with air and steam in a fluidized bed. Heat for the reaction is provided by downward flowing hot thermal refractory material through the fluidized bed. The refractory material is heated externally of the fluidized bed by combustion of fuel. Control of the ratio of steam and air to the coal provides a gasification product of approximately 3 moles carbon monoxide plus hydrogen per mole of nitrogen.

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Des Peres, MO, United States of America

Talmage D McMinn