化工学报Issue(10)：3916-3923,8.DOI:10.3969/j.issn.0438-1157.2014.10.023
磷、柠檬酸改性对MoW/Ni/Al2O3催化剂性质及加氢脱氮性能的影响
Effect of citric acid and phosphorus on properties and hydrodenitrogenation performance of MoW/Ni/Al2O3 catalysts
摘要
Abstract
The trimetallic catalysts were prepared by the iso-volume impregnation method using nickel-molybdenum-tungsten as active metals andγ-Al2O3 as support. The properties of the catalysts modified by phosphorus, citric acid and phosphorus in cooperation with citric acid, as well as the catalytic performance of hydrodenitrogenation and denitrogenation selectivity were examined. The catalysts were characterized with NH3-TPD, Py-IR, H2-TPR, XPS and HRTEM. The results indicated that on the surface of the catalyst modified by phosphorus the amount of weak acid was increased. Also phosphorus promoted the sulfidation of active metals and improved the rate of removal of basic nitrogen and non-basic nitrogen. But phosphorus resulted in the increase of the stacked layers and decreased the dispersion of active metals. Citric acid added in the catalysts could lower the sulfuration temperature of the active metallic oxide, and improve the hydrogenation performance of catalysts; but it had no effect on hydrogenolysis activity, and focused on the removal of non-basic nitrogen. Phosphorus in cooperation with citric acid could not only improve the hydrogenolysis activity of catalysts, but also improve the hydrogenation performance of catalysts. As a result the rate of removal of basic nitrogen and non-basic nitrogen of the catalyst modified by phosphorus in cooperation with citric acid for coker gas oil was remarkably promoted, reaching 80.1% and 54.9% respectively.关键词
催化剂/改性/酸性/加氢活性/加氢脱氮Key words
catalysts/modifying/acidity/hydrogenation performance/hydrodenitrogenation分类
化学化工引用本文复制引用
罗怡,周亚松,魏强,韩璐,刘霄,张超..磷、柠檬酸改性对MoW/Ni/Al2O3催化剂性质及加氢脱氮性能的影响[J].化工学报,2014,(10):3916-3923,8.基金项目
国家自然科学基金项目（U1362203）；国家重点基础研究发展计划项目(2010CB226903)。 （2010CB226903）
