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Citation: HAN Lu, ZHOU Ya-song, WEI Qiang, LUO Yi, WANG Jing-yu. Effect of acidity and hydrogenation ability on the hydrodenitrogenation performance of NiW/Al2O3 catalyst[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(10): 1233-1239. shu

Effect of acidity and hydrogenation ability on the hydrodenitrogenation performance of NiW/Al2O3 catalyst

  • 1.

    State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China

  • Corresponding author: ZHOU Ya-song, 
  • Received Date: 25 March 2014
    Available Online: 5 May 2014

    Fund Project: 国家自然科学基金(U1362203) (U1362203) 国家重点基础研究发展规划(973计划, 2010CB226903)。 (973计划, 2010CB226903)

  • NiW/Al2O3 catalysts for the hydrodenitrogenation of heavy oil were prepared by nickel-tungstate active metals located on Al2O3 with wetness impregnation. The effect of boric acid on the acidity and the effect of citric acid on the hydrogenation ability were studied. The results of NH3-TPD, HRTEM, H2-TPR and XPS showed that the addition of boric acid increased the proportion of strong and medium acid. The strong interaction between the support and metal has been weakened. Citric acid achieved moderate length of Ni-W-S active phases, increased the dispersion and the sulfidation degree of the metal on catalysts surface. NiW catalyst modified with boron acid and citric acid had outstanding HDN performance for Venezuela deasphalted oil, promoted the hydrogenation of aromatics and resin. It also had strong HDN abilities to basic and non-basic nitrogen compounds. The catalyst showed outstanding HDN performance of heavy oil.
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