Applied Energy 225 (2018) 460–470 Contents lists available at ScienceDirect Applied Energy journal homepage: www.elsevier.com/locate/apenergy Mild degradation of Powder River Basin sub-bituminous coal in environmentally benign supercritical CO -ethanol system to produce valuable high-yield liquid tar a,b a a c a Fang-Jing Liu , Khaled A.M. Gasem , Mingchen Tang , Alexander Goroncy , Xin He , a a a, Zaixing Huang , Kaidi Sun , Maohong Fan Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA Key Laboratory of Coal Processing and Eﬃcient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China Department of Chemistry, University of Wyoming, Laramie, WY 82071, USA HIG HLI GHTS GRAPHICAL ABSTRACT High yield liquid tar was produced from PRBSBC coal by degradation in SCCO -ethanol. The synergistic eﬀect between ethanol and SCCO can promote the liquid tar yield. Phenols and esters are the dominant small-molecular chemicals in the li- quid tar. The liquid tar can be separated into light oil and asphaltene fractions by n- heptane. Asphaltene fraction has potential as the precursor to produce carbon na- noﬁbers. ARTIC L E I NF O ABSTRAC T Keywords: A novel and environmentally benign binary
Applied Energy – Elsevier
Published: Sep 1, 2018
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