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在200–350°C考察了Pt-(Sn,Re)/HZSM 5-HMS催化剂上正庚烷异构化反应.采用X射线衍射、X射线荧光光谱、傅里叶变换红外光谱、紫外-可见光谱、H2程序升温还原、NH_3程序升温脱附、吸附吡啶红外光谱、H_2化学吸附、N_2吸附-脱附、扫描电镜和热重等技术对催化剂进行了表征.在不同的H_2和正庚烷分压条件下考察了正庚烷异构化反应动力学,研究了反应条件对催化性能的影响.结果表明,双金属催化剂和三金属催化剂表现出比单金属催化剂更高的催化性能.200 oC时Pt-Sn/HZSM 5-HMS催化剂表现出最高的异庚烷选择性(>74%)和多支链异构体选择性(40%).
The isomerization of n-heptane over Pt- (Sn, Re) / HZSM 5-HMS was investigated at 200-350 ° C. The structures of the catalysts were characterized by X-ray diffraction, X-ray fluorescence spectroscopy, Fourier transform infrared spectroscopy, UV- The results of spectral analysis, temperature-programmed reduction of H2, NH3 temperature-programmed desorption, pyridine-IR spectroscopy, H 2 chemisorption, N 2 adsorption-desorption, SEM and thermogravimetric analysis showed that under different H2 and n- Under the conditions of n-heptane isomerization reaction kinetics study of the reaction conditions on the catalytic performance of the results show that bimetallic catalysts and trimetallic catalysts showed a higher catalytic performance than the single metal catalyst when 200 oC Pt The -Sn / HZSM 5-HMS catalyst showed the highest isoheptane selectivity (> 74%) and the multi-branched isomer selectivity (40%).