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A Study on the Hydrotreating of Coal Hydroliquefaction Residue and its Kinetics

Author

Listed:
  • Jue Huang

    (Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, shanghai, China)

  • Xilan Lu

    (Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, shanghai, China)

  • Dexiang Zhang

    (Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, shanghai, China)

  • Jinsheng Gao

    (Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, shanghai, China)

Abstract

Hydro-conversion of coal hydroliquefaction residue obtained from a 6t/day pilot plant of Shenhua Group in Shanghai was carried out under the hydrotreating condition. The coal hydroliquefaction residue and its product were extracted in sequence with n -hexane, toluene and tetrahydrofuran in a Soxhlet apparatus. The n -hexane soluble fractions increased with the increase of reaction temperature and time. Its amount increased from 14.14% to a maximum of 40.86% under the conditions of 470 °C and 30 min, which meant that moderate extension of coal residence time in the coal hydroliquefaction reactor is beneficial to the increase of oil yield. A 4-lumped kinetic model of coal hydroliquefaction residue hydro-conversion was performed using solubility-based lumped fractions. In the model, the tetrahydrofuran insoluble fractions were classified into two parts: easily reactive part and unreactive part. The kinetic parameters were estimated by a fourth-order Runge-Kutta method and a nonlinear least squares method, and the apparent activation energies were calculated according to the Arrhenius Equation. A large quantity of total catalyst consisting of remained liquefaction catalyst, part of the mineral from raw coal and additive Fe-based catalyst could considerably reduce the apparent activation energy of hydro-conversion for the toluene insoluble/tetrahydrofuran insoluble fractions to 36.79 kJ•mol -1 . The calculated values of the model coincided well with the experimental values.

Suggested Citation

  • Jue Huang & Xilan Lu & Dexiang Zhang & Jinsheng Gao, 2010. "A Study on the Hydrotreating of Coal Hydroliquefaction Residue and its Kinetics," Energies, MDPI, vol. 3(9), pages 1-10, September.
  • Handle: RePEc:gam:jeners:v:3:y:2010:i:9:p:1576-1585:d:9533
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    Cited by:

    1. Dai, Fei & Gong, Maoming & Li, Chunshan & Li, Zengxi & Zhang, Suojiang, 2015. "New kinetic model of coal tar hydrogenation process via carbon number component approach," Applied Energy, Elsevier, vol. 137(C), pages 265-272.

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