A green body support scaffold may be formed around a rod or cylinder-shaped structure using a pre-made mold. The rod or cylinder-shaped structure can be hollow or solid and can be composed of, but not limited to, metal, plastic, polymer, Teflon, wood, etc. Though it is preferred that the shape of the green body is a cylinder, there is no specified requirements. An ionic conductive membrane is then formed on the surface of the green body support scaffold. The green body support scaffold is then converted to a macro porous support scaffold through pyrolysis. The ionic conductive membrane may be sintered. An illustration of the membrane structure formation can be seen in