还原温度对磷化NiW催化剂噻吩HDS反应活性的影响  

EFFECT OF REDUCTION TEMPERATURE ON THE THIOPHENE HDS ACTIVITY OF PHOSPHATE TREATED NiW CATALYST

作　　者：魏军[1] 李翠清[2] 吴修栋[2] 

机构地区：[1]北京化工大学化学工程学院,北京102900 [2]北京石油化工学院绿色化学与催化材料研究所

出　　处：《石油炼制与化工》2007年第7期26-29,共4页Petroleum Processing and Petrochemicals

基　　金：北京市自然科学基金项目(2052009);北京市教委资助项目(KM200510017003);中国石油化工股份有限公司资助项目(X04009)

摘　　要：采用磷酸氢二铵溶液对工业NiW催化剂进行了磷化处理,用TG,XRD,BET方法对所得的磷化催化剂进行表征,考察还原温度对磷化催化剂噻吩HDS(加氢脱硫)反应活性的影响。实验结果表明,随着焙烧温度提高,磷化催化剂前体的起始磷化还原温度升高,而磷化还原过程的失重率减小。还原温度对磷化催化剂的体相结构影响很小;随着还原温度的升高,磷化催化剂的比表面积增加。磷化催化剂有利于高温时的噻吩HDS反应,其噻吩HDS转化率随还原温度的增加而降低,适宜的NiW催化剂的磷化还原温度为550℃,此时该催化剂在反应温度为300℃和360℃时的噻吩HDS反应转化率分别为61.15%和99.45%。A commercial NiW catalyst was treated with diammonium phosphate solution followed by calcination,and was characterized by TG/DTA, XRD and BET method. The hydrodesulfurization（HDS） activity of the treated catalyst reduced at various temperatures was investigated using thiophene as reactant. Results showed that the initial reduction temperature of the treated NiW catalyst increased with the increase of calcination temperature,and the weight loss during reduction decreased with the increase of calcination temperature. The reduction temperature had minor effect on the catalyst bulk structure, whereas surface area increased with the reduction temperature. The phosphate treated NiW catalyst exhibited good HDS activity at high reaction temperature（e, g. 360 ℃）,and its HDS activity decreased with the increase of reduction temperature. Under the optimum catalyst reduction temperature of 550 ℃, at reaction temperatures of 300 ℃ and 360 ℃ ,the thiophene HDS conversion was 61.15% and 99. 45%, respectively.

关 键 词：磷酸氢二铵 催化剂 噻吩 加氢脱硫 

分 类 号：O643.3[理学—物理化学]