The Distribution of Gaseous Product during Pyrolysis of Direction Liquefaction Residue and Coal

Abstract

The pyrolysis of Shenhua direction residue and Shenhua coal was investigated in a thermo gravimetric analyzer. The TG and DTG curve indicated that compared with coal, the residue has higher weight loss and weight loss rate due to the higher content of heavy oil and asphaltene which produced during the liquefaction process; The residue and coal were also investigated in a fixed bed reactor to determine the composition and the yield of the gaseous product evolved. The main gases were H2, CH4, CO, CO2, C2H4 and C2H6, the residue has less gas produced because most of the active component in coal was destroyed during the liquefaction process, so the main component in residue is inactive substances. The maximum evolution temperature of CO, CO2, C2H4 and C2H6 was about 500°C, which were related to the maximum weight loss rate temperature, in this temperature the decomposition rate of the coal macromolecular structure is largest.