CO2 conversion device
AssigneeeSep Inc.
InventorKenichi Sawamura
Life of this patent
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Abstract
A CO2 conversion device reacts CO2 and hydrogen as raw materials to be converted to methanol or dimethyl ether, in which a methanol synthesis catalyst and a methanol conversion catalyst are disposed with the separation membrane, and methanol and water are produced from CO2 and hydrogen by the methanol synthesis catalyst disposed on a high pressure side via the separation membrane, and then the produced methanol and water from a reaction system containing CO2 and hydrogen are selectively subjected to membrane-permeation through the separation membrane, and a mixture of methanol, dimethyl ether, and water is obtained by the methanol conversion catalyst disposed on a low pressure side via the separation membrane.
Claims7
A CO2 conversion device that reacts CO2 and hydrogen as raw materials to be converted to methanol and dimethyl ether, the CO2 conversion device comprising:
- a lamination body that is formed by laminating
- a methanol synthesis catalyst;
- a separation membrane;
- a support that supports the separation membrane and is made from a porous substrate having a porosity;
- and
- a methanol conversion catalyst in this order, wherein
- the separation membrane is a ZSM-5 zeolite membrane having a Si/Al ratio of 10 to 20,
- a reaction of CO2 and hydrogen in the presence of the methanol synthesis catalyst forms methanol and water in the vicinity of an outer surface of the methanol synthesis catalyst, wherein the vicinity of the outer surface forming the methanol and water is termed as a reaction zone,
- metal cations that selectively adsorb methanol and water with respect to CO2 and hydrogen are immobilized on an exchange cation site of Al in a zeolite framework of the ZSM-5 zeolite,
- the separation membrane is configured to allow the methanol and water to selectively permeate therethrough from the reaction zone rather than CO2 or hydrogen, and
- a mixture of methanol, dimethyl ether, and water is obtained by the methanol conversion catalyst.
Dependencies are inferred from the claim text.