Adsorbent permeability test unit was designed to study the mass transfer performance of the compound adsorbent.Firstly the plate heat source method was used to test the thermal conductivities of granular expanded graphite at different expanded temperatures and different values of expansion time，and then the optimal expansion process is selected.Secondly the optimal expansion process is adopted for compacting processes of expanded graphite under the pressing machine and compacting tool set.After that the permeability was tested with nitrogen as the gas source.The results show that the values of the permeability have dramatic differences when the curing density changed from 100 kg·m-3to 400 kg·m-3，the permeability varied between 10-14—10-12 m2.