铼基催化剂上乙烯与高碳内烯烃歧化制α-烯烃  

Preparation of α-olefins by Metathesis of Ethylene and High-carbon Internal Olefins Over Rhenium-based Catalysts

作　　者：李鹏[1] 田志坚[1] 曲炜[1] 王炳春[1] 徐云鹏[1] 徐竹生[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《辽宁化工》2013年第1期1-3,9,共4页Liaoning Chemical Industry

基　　金：国家自然科学基金项目资助;项目号:20903092

摘　　要：在固定床反应器上考察了不同载体的9%Re2O7/Al2O3催化剂在乙烯与高碳内烯烃歧化反应中的催化性能,同时通过XRD、NH3-TPD、N2吸附、TG-DTG对催化剂进行了表征。实验结果表明,氧化铝载体的比表面积和酸性的增加可以提高高碳内烯烃的转化率和选择性,催化剂失活的主要原因可能是积碳引起的酸量下降。在60℃、3.0 MPa、C12烯烃/C11烯烃摩尔比为1.5和混合高碳内烯烃LHSV=1.0 h-1的反应条件下,9%Re2O7/ZB-Al2O3上的高碳内烯烃转化率达到82.23%,选择性达到92.66%。Preparation of α-olefins by metathesis of ethylene and high-carbon internal olefins over rhenium-based catalysts with different supports were investigated in a fixed-bed reactor.The catalysts were characterized by X-ray diffraction,NH3 temperature-programmed desorption,N2-adsorption and TG-DTG.The results indicate that the acid strength and BET areas of alumina supports can enhance conversion and selectivity of high-carbon internal olefins.The main reason for catalyst deactivation is that the acid strength reduces because of carbon deposition.Under the reaction conditions of 60℃,3.0 MPa,mole ratio of C12 olefins to C11olefins 1.5,LHSV=1.0 h-1,9% Re2O7/ZB-Al2O3catalyst,conversion ant selectivity of high-carbon internal olefins can reach 82.23% and 92.66%,respectively.

关 键 词：Α-烯烃 乙烯 歧化 铼基催化剂 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]