TY - JOUR
T1 - Effects of SiO2/Al2O3, MgO modification and hydrothermal treatment on the catalytic activity of HZSM-5 zeolites in the methylation of 4-methylbiphenyl with methanol
AU - Guo, Xinwen
AU - Shen, Jianping
AU - Sun, Lu
AU - Song, Chunshan
AU - Wang, Xiangsheng
N1 - Funding Information:
The project was sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, and by Pennsylvania State University. We express our sincere gratitude to Editor Prof. Kohichi Segawa (Sophia University) and the reviewer for their thoughtful discussion.
PY - 2004/4/30
Y1 - 2004/4/30
N2 - The objective of this work is to study the effects of SiO 2/Al2O3 of HZSM-5, MgO modification and hydrothermal treatment on methylation of 4-methylbiphenyl (4-MBP) with methanol under fixed-bed down-flow conditions. The results show that, with an increase in the SiO2/Al2O3 of HZSM-5 (from 50 to 150, molar ratio), the selectivity to 4,4′-dimethylbiphenyl (4,4′-DMBP) increases from 25 to 79%. MgO modification also increases the selectivity to 4,4′-DMBP, but leads as well to low catalyst activity and rapid deactivation. Hydrothermal treatment not only increases the selectivity, but also improves the stability. When CBV1502 (SiO2/Al2O 3=150) catalyst was hydrothermally treated at 500°C, the selectivity to 4,4′-DMBP increased to 85%. The selectivity to 4,4′-DMBP was further improved to about 90% by the increasing in the amount of mesitylene in the feed as solvent.
AB - The objective of this work is to study the effects of SiO 2/Al2O3 of HZSM-5, MgO modification and hydrothermal treatment on methylation of 4-methylbiphenyl (4-MBP) with methanol under fixed-bed down-flow conditions. The results show that, with an increase in the SiO2/Al2O3 of HZSM-5 (from 50 to 150, molar ratio), the selectivity to 4,4′-dimethylbiphenyl (4,4′-DMBP) increases from 25 to 79%. MgO modification also increases the selectivity to 4,4′-DMBP, but leads as well to low catalyst activity and rapid deactivation. Hydrothermal treatment not only increases the selectivity, but also improves the stability. When CBV1502 (SiO2/Al2O 3=150) catalyst was hydrothermally treated at 500°C, the selectivity to 4,4′-DMBP increased to 85%. The selectivity to 4,4′-DMBP was further improved to about 90% by the increasing in the amount of mesitylene in the feed as solvent.
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U2 - 10.1016/j.apcata.2003.11.001
DO - 10.1016/j.apcata.2003.11.001
M3 - Article
AN - SCOPUS:1842457695
SN - 0926-860X
VL - 261
SP - 183
EP - 189
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 2
ER -