Understanding the relationship between composition and hydrodesulfurization properties for cobalt phosphide catalysts
Understanding the relationship between composition and hydrodesulfurization properties for cobalt phosphide catalysts
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DOI：
10.1016/j.apcata.2008.03.022
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发表时间：
2008-07-01
影响因子：
5.5
通讯作者：
Bussell, Mark E.
中科院分区：
文献类型：
--
作者：
Burns, Autumn W.;Layman, Kathryn A.;Bussell, Mark E.
以P/Co摩尔比为0.50-2.0的前驱体为原料，制备了二氧化硅负载的磷化钴（Co（x）P（y）/SiO（2））催化剂，并对该催化剂的噻吩加氢脱硫性能进行了表征和评价。CO（x）P（y）/SiO（2）催化剂的HDS活性根据Co磷化物相的组成而变化近四倍，其中最具活性的CO（x）P（y）/SiO（2）催化剂对应于具有刚好足够的P以确保在二氧化硅载体上形成相纯的CoP的前体组合物。对于这种Co磷化物组合物观察到的HIDS活性的最大值可以与位点密度（如通过O2化学吸附测量的）和对S掺入的抗性（如通过经受H（2）S/H（2）处理的催化剂的S分析测量的）之间的平衡相关。(C)2008年由Elsevier B. V.出版。
Silica-supported cobalt phosphide (Co(x)P(y)/SiO(2)) catalysts, prepared from precursors having P/Co molar ratios in the range 0.50-2.0, were characterized and evaluated for thiophene hydrodesulfurization (HIDS). The HDS activities of the CO(x)P(y)/SiO(2) catalysts varied nearly four-fold depending on the composition of the Co phosphide phase, with the most active CO(x)P(y)/SiO(2) catalyst corresponding to the precursor composition having just enough P to ensure formation of phase-pure CoP on the silica support. The maximum in HIDS activity observed for this Co phosphide composition can be correlated with a balance between site density (as measured by 02 chemisorption) and resistance to S incorporation (as measured by S analysis of catalysts subjected to an H(2)S/H(2) treatment). (C) 2008 Published by Elsevier B.V.