Mo_2C/CCA催化剂制备及环己烷脱氢性能研究  

Preparation and Property on Cyclohexane Dehydrogenation Activity of Mo_2C/CCA

作　　者：刘曌[1] 马骏[1] 王海彦[1] 白英芝[1] 柳璐[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《辽宁石油化工大学学报》2012年第3期13-16,共4页Journal of Liaoning Petrochemical University

摘　　要：以(NH4)6Mo7O24.4H2O为钼源,以覆炭γ-Al2O3(CCA)为载体,采用浸渍法制备出催化剂前驱物Mo3O/CCA。以正己烷为渗碳剂对前驱物进行碳化得到Mo2C/CCA。对不同碳化终温下制得的催化剂进行了XRD表征。在固定床反应装置上进行了环己烷脱氢反应,考察了催化剂的制备条件及反应条件对催化剂脱氢活性的影响。结果表明:当载体CCA覆炭量为7.82%,碳化终温为650℃,反应条件为温度475℃、压力0.1 MPa、空速2h-1、氢烃体积比200∶1时,环己烷的转化率最高可达91%。The Mo3O/CCA was prepared by impregnation method using the(NH4)6Mo7O24·4H2O as the molybdenum source,carbon covered γ-Al2O3(CCA) as support,and n-hexane as the carbon source.After carbonization of Mo3O/CCA obtained Mo2C/CCA.The catalysts prepared at different carbonization temperature were characterized by XRD.The effects of preparation and reaction conditions on dehydrogenation activity of the catalyst were studied in a fixed-bed down-flow reactor.The results show that the conversion of cyclohexane up to 91% was attained under the optimum condition as follows: CCA carbon covered 7.82%,final carbonization temperature 650 ℃,reaction temperature 475 ℃,reaction pressure 0.1 MPa,liquid hourly space velocity 2 h-1 and volume ratio of hydrogen to cyclohexane 200∶1.

关 键 词：碳化钼 CCA 环己烷 脱氢 正己烷 

分 类 号：TQ426.6[化学工程] O643.3[理学—物理化学]