免预硫化的加氢脱硫MoNiP／Al2O3催化剂的制备和表征.pdfVIP

第28卷第 12期 催 化 学 报 2007年 12月 Vo1．28 No．12 ChineseJournal ofCatalysis December 2007 文章编号：0253—9837(2007)12 1096—05 研究论文 ：1096～11O0 免预硫化的加氢脱硫MoNiP／AI2O3催化剂的制备和表征 林 凌， 伊晓东， 邱 波， 王跃敏， 李天赋， 方维平， 万惠霖 (厦门大学化学化工学院，固体表面物理化学国家重点实验室，福建厦门361005) 摘要：在Mo—Ni—P—O浸渍液中添加一定量的极性有机物如柠檬酸等，采用共浸渍法制备了一种不需预硫化和焙烧也具有较高 加氢脱硫活性的MoNiP／AI2O3催化剂，并用 N2吸附、程序升温还原、x射线光电子能谱、红外光谱和元素分析对催化剂进行 了表征．结果表明，柠檬酸的添加削弱了金属组分与载体问的相互作用，有利于金属组分在载体表面的分散，且改善了催化剂 的还原性，使催化剂在与含硫反应物料接触过程中自发硫化，从而有利于催化剂加氢脱硫活性的提高． 关键词：钼；镍；磷；氧化铝；免预硫化；噻吩；加氢脱硫 中图分类号：0643／TQ53 文献标识码：A Preparation and Characterizati0n 0fPresulfidation-Free MoNiP／AI2O3 Catalyst for Th iopheneHydrodesulfurization LIN Ling，YI Xiaodong ，QIU Bo，WANG Yuemin，LI Tianfu，FANG Weiping ，WAN Huilin (State Key Laboratory ofPhysical Chemistry ofSolid Surfaces，College ofChemistry and Chemical Engineering，Xiamen University，Xiamen 361005，Fujian，China) Abstract：A new type of MoNiP／A12()3 catalyst for thiophene hydrodesulfurization was prepared by the co—im— pregnation method．wherein 3 suitable amount of citric acid was added in the Mo—Ni—P—O impregnation solution． The catalyst exhibits high activity for thiophene hydrodesulfurization under presulfidation—and calcination—free conditions．The catalyst was characterized by N2 adsorption，temperature—programmed reduction，X—ray photo— electron spectroscopy，infrared spectroscopy，and elemental analysis methods．The effects of citric acid on the structure and activity of the MoNiP／A12O3 catalyst were studied．The results show that the addition of citric acid weakens the interaction between the active metal components and support。improves dispersion of active metal componen