The thermochemical conversion technique was applied in Alcell lignin from ethanol solvent pulping to indagate the utilization of black liquor to energy,and the pyrolysis characteristics and pyrolytic products of Alcell lignin were studied with thermogravimetric analysis(TGA)and pyrolysis coupled with gas chromatograph–mass spectrometer(Py-GC/MS).The static tubular furnace as an applied industrial research was used to study Alcell lignin pyrolysis.The solid,gas and liquid of products was characterized by electron probe microanalysis(EPMA),gas chromatograph(GC)and gas chromatograph–mass(GC/MS),respectively.The results revealed that the weight-loss process of Alcell lignin was a non-isothermal reaction and composed of only one stage.Pyrolytic products from Alcell lignin in the static tubular furnace were comprised of the gaseous(17.43%),condensed liquid(bio-oil,53.77%)and solid residues(28.81%).The volatiles from Alcell lignin pyrolyzing were almost aromatic hydrocarbons,i.e.styrene,toluene and benzene and few acids.Alcell lignin was converted into high-grade fuel and chemicals by means of thermochemical conversion techniques,hence,pyrolysis of Alcell lignin had a promising development on the comprehensive utilization.