Porous support-zeolite membrane composite, and method for producing porous support-zeolite membrane composite

Abstract

An object of the present invention is to provide a porous support-zeolite membrane composite ensuring that at the time of separation or concentration with a zeolite membrane, both sufficient throughput and high separation performance are achieved in practice and the present invention relates to a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein part of the zeolite membrane penetrates into the inside of the porous support and the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 μm or less on average.

1 . A porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein:
 part of the zeolite membrane penetrates into the inside of the porous support, and   the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 μm or less on average.   
     
     
         2 . A porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein:
 in an SEM image obtained by observing the zeolite membrane from the cross-section, the area proportion of voids present in the zeolite membrane is 0.3% or more relative to the zeolite membrane.   
     
     
         3 . The porous support-zeolite membrane composite according to  claim 1 , wherein in an SEM image obtained by observing the zeolite membrane from the cross-section, the area proportion of voids present in the zeolite membrane is 0.3% or more relative to the zeolite membrane. 
     
     
         4 . The porous support-zeolite membrane composite according to  claim 1 , wherein the SiO 2 /Al 2 O 3  molar ratio of the zeolite membrane is 2,000 or less. 
     
     
         5 . The porous support-zeolite membrane composite according to  claim 2 , wherein the SiO 2 /Al 2 O 3  molar ratio of the zeolite membrane is 2,000 or less. 
     
     
         6 . The porous support-zeolite membrane composite according to  claim 1 , wherein the SiO 2 /Al 2 O 3  molar ratio of the zeolite membrane is 20 or more. 
     
     
         7 . The porous support-zeolite membrane composite according to  claim 2 , wherein the SiO 2 /Al 2 O 3  molar ratio of the zeolite membrane is 20 or more. 
     
     
         8 . The porous support-zeolite membrane composite according to  claim 1 , wherein the average pore size of the porous support is 0.3 μm or more. 
     
     
         9 . The porous support-zeolite membrane composite according to  claim 2 , wherein the average pore size of the porous support is 0.3 μm or more. 
     
     
         10 . The porous support-zeolite membrane composite according to  claim 1 , wherein the pore structure of zeolite constituting the zeolite membrane is CHA or MFI. 
     
     
         11 . The porous support-zeolite membrane composite according to  claim 2 , wherein the pore structure of zeolite constituting the zeolite membrane is CHA or MFI. 
     
     
         12 . The porous support-zeolite membrane composite according to  claim 1 , which is used for separation of a gas mixture. 
     
     
         13 . The porous support-zeolite membrane composite according to  claim 2 , which is used for separation of a gas mixture. 
     
     
         14 . A separation or concentration method of a gas or liquid mixture, comprising bringing a gas or liquid mixture composed of a plurality of components into contact with the porous support-zeolite membrane composite according to  claim 1  to separate by permeation a high-permeability component from the mixture or concentrate a low-permeability component by permeation and separation of a high-permeability component. 
     
     
         15 . A separation or concentration method of a gas or liquid mixture, comprising bringing a gas or liquid mixture composed of a plurality of components into contact with the porous support-zeolite membrane composite according to  claim 2  to separate by permeation a high-permeability component from the mixture or concentrate a low-permeability component by permeation and separation of a high-permeability component. 
     
     
         16 . A production method of a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, comprising
 forming the zeolite membrane on the porous support having attached thereto an inorganic particle except for zeolite.   
     
     
         17 . The production method of a porous support-zeolite membrane composite according to  claim 16 , wherein from 0.1 to 15 g of the inorganic particle is attached onto 1 m 2  of the porous support. 
     
     
         18 . A production method of a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, comprising
 forming the zeolite membrane after attaching a seed crystal onto the porous support, wherein   the ratio represented by (average particle size of seed crystal)/(average pore size of porous support) is from 0.3 to 10.   
     
     
         19 . The production method of a porous support-zeolite membrane composite according to  claim 18 , wherein the average pore size of the porous support is 0.3 μm or more.