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Volume 28 Issue 2
Apr.  2015
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Qian Yao, Zhe Tang, Jian-hua Guo, Ying Zhang, Qing-xiang Guo. Effect of Catalyst Properties on Hydrocracking of Pyrolytic Lignin to Liquid Fuel in Supercritical Ethanol[J]. Chinese Journal of Chemical Physics , 2015, 28(2): 209-216. DOI: 10.1063/1674-0068/28/cjcp1409167
Citation: Qian Yao, Zhe Tang, Jian-hua Guo, Ying Zhang, Qing-xiang Guo. Effect of Catalyst Properties on Hydrocracking of Pyrolytic Lignin to Liquid Fuel in Supercritical Ethanol[J]. Chinese Journal of Chemical Physics , 2015, 28(2): 209-216. DOI: 10.1063/1674-0068/28/cjcp1409167
shu

Effect of Catalyst Properties on Hydrocracking of Pyrolytic Lignin to Liquid Fuel in Supercritical Ethanol

  • 1.

    Collaborative Innovation Center of Chemistry for Energy Materials, Anhui Province Key Laboratory of Biomass Clean Energy and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China

  • 2.

    School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, China

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  • Received Date: September 29, 2014
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  • The metal-acid bifunctional catalysts have been used for bio-oil upgrading and pyrolytic lignin hydrocracking. In this work, the effects of the metal-acid bifunctional catalyst properties, including acidity, pore size and supported metal on hydrocracking of pyrolytic lignin in supercritical ethanol and hydrogen were investigated at 260 oC. A series of catalysts were prepared and characterized by BET, XRD, and NH3-TPD techniques. The results showed that enhancing the acidity of the catalyst without metal can promote pyrolytic lignin polymerization to form more solid and condensation to produce more water. The pore size of microporous catalyst was smaller than mesoporous catalyst. Together with strong acidity, it caused pyrolytic lignin further hydrocrack to numerous gas. Introducing Ru into acidic catalysts promoted pyrolytic lignin hydrocracking and inhibited the polymerization and condensation, which caused the yield of pyrolytic lignin liquefaction product to increase significantly. Therefore, bifunctional catalyst with high hydrocracking activity metal Ru supported on materials with acidic sites and mesopores was imperative to get satisfactory results for the conversion of pyrolytic lignin to liquid products under supercritical conditions and hydrogen atmosphere.
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