2008Microwave-assisted hydroconversions of demineralized coal liquefaction residues from Shenfu and.pdf

This article was published in an Elsevier journal. The attached copy is furnished to the author for non-commercial research and education use, including for instruction at the author’s institution, sharing with colleagues and providing to institution administration. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: /copyright Authors personal copy Microwave-assisted hydroconversions of demineralized coal liquefaction residues from Shenfu and Shengli coals Tao-Xia Wang, Zhi-Min Zong, Jia-Wei Zhang, Yan-Bin Wei, Wei Zhao, Bao-Min Li, Xian-Yong Wei * School of Chemical Engineering, China University of Mining and Technology, Xuzhou, 221008 Jiangsu, China Received 22 November 2006; received in revised form 5 April 2007; accepted 5 April 2007 Available online 21 May 2007 Abstract Microwave-assisted hydroconversions of demineralized coal liquefaction residues (DCLRs) from Shenfu (SF) and Shengli coals were investigated using methanol or ethanol as the solvent for both reaction and extraction. The results show that the solubilities of hydro- converted DCLRs in methanol under 0.7 MPa of initial hydrogen pressure (IHP) follow the order: non-catalytic hydroconversion = activated carbon-catalyzed hydroconversion Pd/C-catalyzed hydroconversion Ni-catalyzed hydroconversion; the solubility of Ni-catalyzed hydroconverted DCLR from SF coal in methanol increases with raising temperature up to 140 C and with increase in IHP; the solubility of Ni-catalyzed hydroconverted DCLR from SF coal in methanol under 0.7 MPa of IHP at 130 C is higher than that in ethanol. The molecular compositions of the extracta