磷化钨催化剂的表征和加氢精制性能

被引：5

作者：

孙桂大

李翠清

李凤艳

周志军

机构：

[1] 北京石油化工学院

来源：

石油学报(石油加工) | 2005年 / 03期

关键词：

磷化钨; 加氢脱硫; 加氢脱氮; 镍; 钴;

D O I：

暂无

中图分类号：

O643.32 [催化反应];

学科分类号：

摘要：

采用在H2气中程序升温还原磷化反应的方法合成了磷化钨(WP)和负载型磷化钨催化剂(WP/γAl2O3),用XRD、TEM和XPS等技术表征了合成的催化剂,并考察了WP催化剂的加氢精制性能。采用TGDTA手段研究了WP催化剂的还原磷化过程,证明其为一步反应过程。WP催化剂钝化时,其表面层能被氧化,但不改变其体相结构。活性组分W和γAl2O3载体之间有较强的相互作用,使γAl2O3表面上的W组分在催化剂合成的温度下不能完全还原为磷化物而形成Al-O-W-P结构。WP/γAl2O3催化剂具有优良的加氢脱氮(HDN)和加氢脱硫(HDS)性能,特别是对大分子含氮有机化合物有更高的脱氮活性。助剂Co和Ni对WP/γAl2O3催化剂具有助催化作用,但助剂Ni对吡啶的脱氮性能有抑制作用。含有助剂Ni的WP/γAl2O3催化剂对柴油显示了比硫化态的工业催化剂更良好的HDS性能。

引用

页码：54 / 60

页数：7

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