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环境法规对硫氧化物脱出的限制日益严格以及原油品质的不断下降,使得有必要研发高效的加氢脱硫催化剂。Ni2P由于具有优异的加氢脱硫活性和稳定性,引起了广泛的关注。本文综述了Ni2P加氢脱硫催化剂的特性、反应活性相、制备方法、改进和加氢脱硫活性等方面的研究进展。在Ni2P中存在两种不同的初始活性位,四面体几何构型的Ni(1)初始活性位在加氢脱硫反应中参与直接脱硫反应,四方锥几何构型的Ni(2)初始活性位则与催化剂的高加氢活性有关。在加氢脱硫反应中,催化剂表面生成的NixSyP相被认为是真正的活性相。制备Ni2P的方法主要是程序升温还原和液相合成。载体、助剂和络合剂对Ni2P活性相的形成和催化剂的活性有重要影响。相比于商用硫化物催化剂,Ni2P催化剂对噻吩、二苯并噻吩和4,6-二甲基二苯并噻吩均表现出更高的加氢脱硫活性。
Increasingly stringent limits on sulfur oxide emissions from environmental regulations and declining quality of crude oil make it necessary to develop efficient catalysts for hydrodesulfurization. Ni2P has attracted a great deal of attention due to its excellent hydrodesulfurization activity and stability. This review summarizes the research progress of Ni2P hydrodesulfurization catalyst in its properties, reactive phases, preparation methods, improvement and hydrodesulfurization activity. There are two different initial active sites in Ni2P. The initial active site of Ni (1) in the tetrahedral geometry is involved in the direct desulfurization reaction in the hydrodesulfurization reaction. The Ni (2) initial active site of the tetragonal cone geometry With the high hydrogenation activity of the catalyst. In the hydrodesulfurization reaction, the NixSyP phase formed on the catalyst surface is considered to be the real active phase. Preparation of Ni2P method is mainly temperature reduction and liquid phase synthesis. The carriers, auxiliaries and complexing agents have a significant influence on the formation of Ni2P active phase and the activity of the catalyst. Ni2P catalysts showed higher hydrodesulfurization activity for thiophene, dibenzothiophene and 4,6-dimethyldibenzothiophene compared to commercial sulfide catalysts.