Influence of Reduction Temperature on the Structure and Naphthalene Hydrogenation Saturation Performance of Ni2P/Al2O3 Catalysts
Influence of Reduction Temperature on the Structure and Naphthalene Hydrogenation Saturation Performance of Ni2P/Al2O3 Catalysts
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DOI：
10.3390/cryst12030318
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发表时间：
2022-02
期刊：
影响因子：
2.7
通讯作者：
Zeren Li;Jie-ying Jing;Zhipeng Qie;Wen‐ying Li
中科院分区：
文献类型：
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作者：
Zeren Li;Jie-ying Jing;Zhipeng Qie;Wen‐ying Li
以煤直接液化油为原料，经加氢饱和工艺可制得富含氢芳烃和环烷烃的喷气燃料。开发一种高效的催化剂将萘烃转化为高选择性的氢芳烃和环烷烃，对实现上述加氢饱和过程具有重要意义。本研究通过亚磷酸盐的热分解，在不同还原温度下制备了Ni2P/Al2O3催化剂。研究了还原温度对Ni2P/Al2O3催化剂性能的影响，结果表明还原温度对Ni2P/Al2O3催化剂的性能有重要影响。当还原温度为400℃时，Ni2P/Al2O3催化剂的Ni2P粒径为3.8 nm，比表面积为170 m2/g。此外，在400℃下还原的Ni2P/Al2O3催化剂具有98%的萘转化率和98%的十烷选择性。Ni2P/Al2O3催化剂具有较好的催化活性，这主要是由于Ni2P粒径较小、比表面积较高、酸度适宜，从而增强了Ni2P/Al2O3催化剂对萘的吸附。
Jet fuel rich in hydroaromatics and cycloalkanes could be derived from direct coal liquefaction oil via the hydrogenation saturation process. Developing an efficient catalyst to transform naphthalene hydrocarbons to hydroaromatics and cycloalkanes with high selectivity plays a significant role in realizing the above hydrogenation saturation process. In this work, Ni2P/Al2O3 catalysts were prepared at different reduction temperatures via the thermal decomposition of hypophosphite. We investigated the influence of reduction temperature and the results showed that reduction temperature had an important impact on the properties of Ni2P/Al2O3 catalysts. When the reduction temperature was 400 °C, the Ni2P particle size of the Ni2P/Al2O3 catalyst was 3.8 nm and its specific surface area was 170 m2/g. Furthermore, the Ni2P/Al2O3 catalyst reduced at 400 °C obtained 98% naphthalene conversion and 98% decalin selectivity. The superior catalytic activity was attributed to the smaller Ni2P particle size, higher specific surface area and suitable acidity, which enhanced the adsorption of naphthalene on Ni2P/Al2O3 catalyst.