Preparation of the Supported Composite Carbon Membranes and Their Architecture

Supported composite carbon membrane is a novel carbon membrane superior to polymerized membranes in many properties, and mainly used for gas separation or water treatment depending on the pore size and other properties. In this paper, the phenolic resin was used as the carbon source and the ceramic membrane tubes were used as the support to prepare the supported composite carbon membrane by spray coating. The average pore size of supported composite carbon membrane was determined by bubble pressure method, and its structure was characterized by infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The experimental results showed that repeated sintering could effectively improve the internal structure of the ceramic tubes and reduce the defects at the dense layer, the carbon membranes and the ceramic tubes mainly bonded together by mechanical bonding, and the average pore diameter of the supported composite carbon membrane is 0.09 μm and the pure water flux can reach 1.46 kg·h^-1·m^-2 at 0.50 MPa.