铈源及其组成对乙苯脱氢制苯乙烯催化剂结构和性能的影响  

Effect of Cerium Sources and Their Composition on the Structure and Catalytic Performance of the Catalysts for Ethylbenzene Dehydrogenation to Styrene

作　　者：崔裕洋 李扬[1] 袁成龙[1] 方维平[1] 杨意泉[2] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,福建厦门361005 [2]厦门大学化学化工学院化学系醇醚酯清洁生产国家工程实验室,福建厦门361005

出　　处：《石油学报（石油加工）》2015年第6期1402-1407,共6页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：以Ce(NO_3)_3和CeO_2为混合铈源制备了一系列Fe-K-Ce-Mo乙苯脱氢催化剂,并采用BET、XRD、CO_2-TPD和XPS等手段对其进行表征,考察了m(Ce(NO_3)_3)/m(Ce(NO_3)_3+CeO_2)对该催化剂结构、酸碱性以及催化乙苯脱氢反应性能的影响。结果表明,m(Ce(NO_3)_3)/m(Ce(NO_3)_3+CeO_2)=0.60时,催化剂具有中等水平的比表面积、较低的孔体积和较大的孔径,产生较多的活性相,酸碱中心数目和强度达到最佳,晶格氧丰富,催化剂催化乙苯脱氢反应活性最佳。A series of Fe-K-Ce Mo catalysts with Ce（NO3）3and CeO2as Ce precursor were prepared for ethylbenzene dehydrogenation to styrene and characterized by means of BET, XRD, TPD, and XPS techniques. The e{feet of m（Ce（NO3）3）/m（Ce（NO3 ）3 ＋CeO2） to the catalytic performance of the prepared Fe-K-Ce Mo catalyst in ethylbenzene dehydrogenation was investigated. The results showed that when rn（Ce（NO3 ）3 ）/m（Ce（NO3 ）3 ＋CeO2 ） = 0.60, the prepared Fe-K-Ce-Mo catalyst possessed a middle level surface, low pore volume and large pore size, more active phase, the optimal amount and strength of acid-base center, rich lattice oxygen, so the best activity.

关 键 词：乙苯脱氢 催化剂 铈助剂 乙苯 苯乙烯 

分 类 号：TQ426[化学工程]