Patent ID: 8668094

Claim:
A carbon membrane structure comprising: a cylindrical porous support body provided with a plurality of cells extending from one end face to the other end face and functioning as fluid passages, and a carbon membrane disposed on the surface side of the cells formed in the porous support body; wherein the plurality of cells are formed so that a distance L from one cell to another cell adjacent to the one cell in a cross section perpendicular to a cell extension direction of the porous support body is 0.60 mm or more, and wherein the porous support body comprises a support body having an average particle diameter of 10 to 100 μm and an average pore size of 1 to 30 μm, an intermediate layer formed on a surface of the support body having an average particle diameter of 0.3 to 10 μm and an average pore size of 0.1 to 3 μm, and a surface layer formed on a surface of the intermediate layer having an average particle diameter of 0.03 to 1 μm and an average pore size of 0.01 to 0.5 μm.