Sökning: onr:"swepub:oai:DiVA.org:kth-23360" >
Effects of SiO2/Al2...
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
-
Guo, X. W. (författare)
-
Shen, J. P. (författare)
-
Sun, Licheng (författare)
-
visa fler...
-
Song, C. S. (författare)
-
Wang, X. S. (författare)
-
visa färre...
- Elsevier BV, 2004
- 2004
- Engelska.
-
Ingår i: Applied Catalysis A. - : Elsevier BV. - 0926-860X .- 1873-3875. ; 261:2, s. 183-189
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The objective of this work is to study the effects Of SiO2/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/Al2O3 = 150) catalyst was hydrothermally treated at 500degreesC, 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.
Nyckelord
- shape selectivity
- 4-methylbiphenyl
- methylation
- HZSM-5
- SiO2/Al2O3
- MgO modification
- hydrothermal treatment
- shape-selective alkylation
- polynuclear aromatics
- specialty chemicals
- mfi structure
- naphthalene
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas