Method for producing hydrocarbons and oxygen from carbon dioxide

Chemistry of hydrocarbon compounds – Saturated compound synthesis – From nonhydrocarbon feed

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585638, C07C 112

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active

043272398

ABSTRACT:
Water is fed into a high temperature pressurized vessel containing hydrated zeolite material loaded with a metal cation in its highest oxidation state. The high temperature causes an endothermic redox reaction to occur that produces oxygen gas and, as a solid reaction product, hydrated zeolite material containing the metal cation in a lower oxidation state and protons. The solid reaction product is passed through a heat exchanger, where it is cooled, and then into a second pressurized reaction vessel at low temperature. Carbon dioxide is fed into the low temperature reaction vessel whereby an exothermic redox reaction occurs that produces a mixture of hydrocarbons and water and that oxidizes the cation back to its highest oxidation state. The oxidized-cation containing hydrated zeolite material generated in the second reaction vessel is passed through the formentioned heat exchanger, where it is heated, and then passed back to the first reaction vessel for recycling. Pressurization is employed in the reaction vessels to prevent dehydration and this, together with the use of the heat exchanger, provides high process thermal efficiency.

REFERENCES:
patent: 4197421 (1980-04-01), Steinberg
patent: 4278650 (1981-07-01), Dorrance

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