Abstract: In order to meet the requirements of domestic coal tar hydrogenation process, 50nm ceramic membrane was used to filter the coal tar in this study. The results showed that the optimum filtration temperature is 140℃ and the optimum operating pressure is 0.3 MPa. The removal rate of heavy metal, ash and water can reach 90%. After cleaning the membrane the flux recovered to 90%.

Key words: ceramic membrane, filtration and purification, coal tar