Indexed by:期刊论文

Date of Publication:2017-06-01

Journal:FUEL PROCESSING TECHNOLOGY

Included Journals:SCIE、EI

Volume:160

Page Number:130-135

ISSN No.:0378-3820

Abstract:In this paper, the liquefaction of a Bulianta coal, from China Shenhua Group, was carried out in a hydrogen donor solvent, tetralin, or a non-hydrogen donor solvent, 1-methylnaphthalene, with or without catalyst to clarify the mechanism of hydrogen transfer. And roles of solvent and a nano-size iron catalyst from Shenhua Group in the heating-up stage of DCL were also investigated by using mixed solvent of decalin, phenanthrene, pyrene or fluoranthene and tetralin. The results show that tetralin inhibits the reaction of coal macromolecule to oil and the transfer of H-2. The major transfer approach of H-2 may be directly from H-2 to coal rather than via the hydrogen donor solvents in the presence of the nano-sized iron catalyst. In the heating-up stage of DCL, the major role of solvent is to provide activated hydrogen for coal. High dissolving capability of the liquefaction solvent that has high enough hydrogen donor capacity is beneficial for improving liquefaction performance. The dominant function of the catalyst is to promote the activation of H-2, which can improve coal liquefaction performance in the heating-up stage of DCL. (C) 2017 Elsevier B.V. All rights reserved.