Synergetic Effect and Product Characteristics of Coal and Salix psammophila Co-pyrolysis

Juhui Gong, Tingting Shao, Kebing Wang


The co-pyrolysis of Salix psammophila and coal was conducted in a pyrolysis reactor. The interaction between coal and S. psammophila at different ratios was investigated. It was found that the promotion and inhibition effects of the co-pyrolysis experiment were more obvious at 20 wt.% and 40 wt.% Salix psammophila, respectively, indicating a certain synergistic effect. The results of the N2 adsorption-desorption experiment showed that the addition of S. psammophila increased the surface area and decreased the pore size of the co-pyrolysis char. The Fourier transform infrared (FT-IR) spectra indicated that the pyrolysis tar contained mainly aromatic rings and fatty compounds. The addition of S. psammophila was beneficial to the decomposition of phenolic hydroxyls, ether bonds, and oxygen-containing heterocyclic rings in the coal tar. However, the addition of 50 wt.% S. psammophila blocked the pores of the coal and thus obstructed its pyrolysis, while the porosity of the co-pyrolysis char became more abundant. Richer porosity of the char implies great potential to be widely used in the sewage treatment industry.


Biomass; Co-pyrolysis; Oil; Char; Synergetic effect

Full Text: PDF

Welcome to BioResources! This online, peer-reviewed journal is devoted to the science and engineering of biomaterials and chemicals from lignocellulosic sources for new end uses and new capabilities. The editors of BioResources would be very happy to assist you during the process of submitting or reviewing articles. Please note that logging in is required in order to submit or review articles. Martin A. Hubbe, (919) 513-3022,; Lucian A. Lucia, (919) 515-7707, URLs:; ISSN: 1930-2126