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.

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.

Abstract: The method for separating water by a separation membrane is a method for separating water from an aqueous organic acid solution by the separation membrane, and the separation membrane consists of polycrystalline membrane of mordenite (the chemical composition of the frame: AlnSi40-nO96, 2?n?, further, a major component of exchangeable cations present in ion exchange sites of the mordenite is protons (H+). The separation membrane for dehydrating an aqueous organic acid solution exhibits unexpectedly remarkable water permeability and has excellent acid resistance, without damaging water separation selectivity. The method for separating water using this separation membrane enables, for example, realizing the process of dehydrating acetic acid by the separation membrane, and a great energy saving. There are provided the above-described separation membrane for dehydrating an aqueous organic acid solution, and the method for manufacturing it.