Increase of the Ni/W Ratio in Heteropolyanions Based NiW Hydrocracking Catalysts with Improved Catalytic Performances
Increase of the Ni/W Ratio in Heteropolyanions Based NiW Hydrocracking Catalysts with Improved Catalytic Performances
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DOI：
10.1007/s10562-013-1173-5
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发表时间：
2014-03
影响因子：
2.8
通讯作者：
K. B. Tayeb;C. Lamonier;C. Lancelot;M. Fournier;Audrey Bonduelle-Skrzypczak;F. Bertoncini
中科院分区：
文献类型：
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作者：
K. B. Tayeb;C. Lamonier;C. Lancelot;M. Fournier;Audrey Bonduelle-Skrzypczak;F. Bertoncini
本文研究了硝酸镍提高镍钨比对杂多化合物（HPC）基催化剂的影响。采用拉曼、XPS和HRTEM等技术对催化剂进行了表征，并以甲苯加氢为模型反应进行了考察。发现通过添加硝酸镍获得的比率为0.36的Ni 2SiW 12 O 40基催化剂具有最好的催化活性，与最有效的基于HPC的催化剂相比，化学计量的Ni/W比率为0.36。拉曼光谱表明，SiW 12 O 404 −HPA在干燥步骤中分解为SiW 11 O398 −物质。图形摘要
AbstractIn the present work, we investigated the influence of the increase of Ni/W ratio by the addition of nickel nitrate on heteropolycompound (HPC) based catalysts. Synthesized catalysts were characterized by Raman, XPS and HRTEM techniques and were examined in the model reaction of toluene hydrogenation. The Ni2SiW12O40based catalyst with a ratio of 0.36 obtained by addition of nickel nitrate was found to have the best catalytic activity compared to the most efficient of the HPC based catalysts with a stoichiometric Ni/W ratio of 0.36. Raman spectroscopy showed that the SiW12O404−HPA was decomposed during the drying step in SiW11O398−species.Graphical Abstract