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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%。
The catalytic performance of 9% Re2O7 / Al2O3 catalysts with different supports on disproportionation of ethylene and high-carbon internal olefins was investigated on a fixed-bed reactor. The catalysts were characterized by XRD, NH3-TPD, N2 adsorption and TG-DTG . The experimental results show that the increase of specific surface area and acidity of the alumina carrier can increase the conversion and selectivity of high-carbon internal olefins. The main reason for the catalyst deactivation may be the decrease of the acid amount caused by carbon deposition. The conversion of high-carbon internal olefin on 9% Re2O7 / ZB-Al2O3 reached to 82.23 at 60 ℃, 3.0 MPa, molar ratio of C12 olefin / C11 olefin of 1.5 and mixed high-carbon internal olefin LHSV = 1.0 h-1 %, The selectivity reached 92.66%.