Zeolite membrane composite

Abstract

A zeolite membrane composite for use in separation of a highly-permeative component through permeation from a vapor mixture or a liquid mixture comprising multiple components, the zeolite membrane composite comprising an inorganic porous support and a zeolite membrane provided thereon, wherein the zeolite membrane contains zeolite of a CHA-type aluminosilicate, and in a X-ray diffraction pattern obtained through irradiation to the zeolite membrane surface with X-ray, a peak intensity at around 2θ=17.9° has a value of less than 0.5 times a peak intensity at around 2θ=20.8° and a peak intensity at around 2θ=9.6° has a value of 2.0 times or more and less than 4.0 times a peak intensity at around 2θ=20.8°.

1 . A zeolite membrane composite for use in separation of a highly-permeative component through permeation from a vapor mixture or a liquid mixture comprising multiple components, the zeolite membrane composite comprising an inorganic porous support and a zeolite membrane provided thereon, wherein the zeolite membrane contains zeolite of a CHA-type aluminosilicate, and in a X-ray diffraction pattern obtained through irradiation to the zeolite membrane surface with X-ray, a peak intensity at around 2θ=17.9° has a value of less than 0.5 times a peak intensity at around 2θ=20.8° and a peak intensity at around 2θ=9.6° has a value of 2.0 times or more and less than 4.0 times a peak intensity at around 2θ=20.8°. 
     
     
         2 . The zeolite membrane composite according to  claim 1 , wherein a molar ratio of SiO 2 /Al 2 O 3  in the zeolite is 6 or more and 500 or less. 
     
     
         3 . The zeolite membrane composite according to  claim 1 , wherein a water adsorption of the zeolite membrane composite at a relative pressure of 0.8, as obtained from a water vapor adsorption isotherm of the zeolite membrane composite, is 2 times or more and 10 times or less a water adsorption thereof at a relative pressure of 0.2. 
     
     
         4 . A zeolite membrane composite for use in separation of a highly-permeative component through permeation from a vapor mixture or a liquid mixture comprising multiple components, the zeolite membrane composite comprising an inorganic porous support and a zeolite membrane provided thereon, wherein the zeolite membrane contains zeolite of a CHA-type aluminosilicate having a molar ratio of SiO 2 /Al 2 O 3  of 30 or more and 100 or less. 
     
     
         5 . The zeolite membrane composite according to  claim 4 , wherein in the X-ray diffraction pattern obtained through irradiation to the zeolite membrane surface with X-ray, a peak intensity at around 2θ=17.9° has a value of less than 0.5 times a peak intensity at around 2θ=20.8°. 
     
     
         6 . The zeolite membrane composite according to  claim 4 , wherein in the X-ray diffraction pattern obtained through irradiation to the zeolite membrane surface with X-ray, a peak intensity at around 2θ=9.6° has a value of 2.0 times or more and less than 4.0 times a peak intensity at around 2θ=20.8°. 
     
     
         7 . The zeolite membrane composite according to  claim 4 , wherein a water adsorption of the zeolite membrane composite at a relative pressure of 0.8, as obtained from a water vapor adsorption isotherm of the zeolite membrane composite, is 2 times or more and 10 times or less a water adsorption thereof at a relative pressure of 0.2. 
     
     
         8 . A zeolite membrane composite for use in separation of a highly-permeative component through permeation from a vapor mixture or a liquid mixture comprising multiple components, the zeolite membrane composite comprising an inorganic porous support and a zeolite membrane provided thereon, wherein the zeolite membrane contains zeolite of a CHA-type aluminosilicate, and a water adsorption of the zeolite membrane composite at a relative pressure of 0.8, as obtained from a water vapor adsorption isotherm of the zeolite membrane composite, is 2 times or more and 10 times or less a water adsorption thereof at a relative pressure of 0.2. 
     
     
         9 . The zeolite membrane composite according to  claim 8 , wherein in the X-ray diffraction pattern obtained through irradiation to the zeolite membrane surface with X-ray, a peak intensity at around 2θ=17.9° has a value of less than 0.5 times a peak intensity at around 2θ=20.8°. 
     
     
         10 . The zeolite membrane composite according to  claim 8 , wherein the zeolite membrane is such that, in the X-ray diffraction pattern obtained through irradiation of the membrane surface with X-rays, the peak intensity at around 2θ=9.6° has a value of 2.0 times or more and less than 4.0 times the peak intensity at around 2θ=20.8°. 
     
     
         11 . The zeolite membrane composite according to  claim 8 , wherein the zeolite has a molar ratio of SiO 2 /Al 2 O 3  of 6 or more and 500 or less. 
     
     
         12 . The zeolite membrane composite according to  claim 2 , wherein the zeolite has a molar ratio of SiO 2 /Al 2 O 3  of 30 or more and 50 or less. 
     
     
         13 . The zeolite membrane composite according to  claim 1 , wherein an air permeation of the zeolite membrane composite as connected to a vacuum line under an absolute pressure of 5 kPa, is 100 L/(m 2 ·h) or more and 1000 L/(m 2 ·h) or less. 
     
     
         14 . The zeolite membrane composite according to  claim 1 , wherein the zeolite membrane is formed by the use of a reaction mixture for hydrothermal synthesis that contains at least potassium (K) as the alkali source therein. 
     
     
         15 . The zeolite membrane composite according to  claim 1 , which is a zeolite membrane composite for use in separation of a highly-permeative component through permeation from a vapor mixture comprising multiple components. 
     
     
         16 . The zeolite membrane composite according to  claim 1 , which is a zeolite membrane composite for use in separation of a highly-permeative component through permeation from a liquid mixture comprising multiple components. 
     
     
         17 . A separation or concentration method for a vapor mixture, which comprises bringing a vapor mixture containing multiple vapor components into contact with the zeolite membrane composite as stated  claim 1  to thereby separate a highly-permeative component through permeation from the vapor mixture, or to thereby separate a highly-permeative vapor component through permeation therefrom so as to concentrate a poorly-permeative vapor component. 
     
     
         18 . The method according to  claim 17 , wherein the vapor mixture contains at least one component selected from a group consisting of carbon dioxide, hydrogen, oxygen, nitrogen, methane, ethane, ethylene, propane, propylene, normal butane, isobutane, 1-butene, 2-butene, isobutene, sulfur hexafluoride, helium, carbon monoxide, nitrogen monoxide and water. 
     
     
         19 . A separation or concentration method for a liquid mixture, which comprises bringing a liquid mixture containing multiple components into contact with the zeolite membrane composite as stated in  claim 1  to thereby separate a highly-permeative component through permeation from the liquid mixture, or to thereby separate a highly-permeative component through permeation therefrom so as to concentrate a poorly-permeative component.