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Citation: YU Pan-long, FANG Meng-xiang, TANG Wei, WANG Qin-hui, LUO Zhong-yang. Viscosity reduction of coal tar from fluidized bed pyrolysis[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(1): 26-32. shu

Viscosity reduction of coal tar from fluidized bed pyrolysis

  • 1.

    State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

  • Corresponding author: FANG Meng-xiang, 
  • Received Date: 11 June 2012
    Available Online: 28 August 2012

    Fund Project: 国家高技术研究发展计划(863计划, 2007AA05Z334) (863计划, 2007AA05Z334) 浙江省自然科学基金(R1080101) (R1080101) 国际合作项目(2011DFR60190)。 (2011DFR60190)

  • For the poor fluidity of coal tar generated from circulating fluidized bed polygeneration system, a series of research was carried out to decrease the viscosity. Through the analysis of X-ray diffraction, the possibility that the wax crystal increases the viscosity at room temperature was excluded. The viscosity and contents between coal tar and coal tar pitch were compared, and the impact of quinoline insoluble on the softening point was also investigated. The results reveal that it is reasonable to employ the distillates to decrease the viscosity of coal tar. Four kinds of distillates were blended in the coal tar to improve the fluidity, and the composition of the distillates was gotten through the GC-MS analysis. It is concluded that the molecule which contains both hydrophilic groups and hydrophobic groups possesses a great effect on the viscosity reduction, and the more the amount, the better the viscosity reduction. Four kinds of mono-component additives were tested, and the theory was verified. For the viscosity reduction, the molecule with both groups is better than that with only hydrophobic groups.
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