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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
- Artikel/kapitelEngelska2004
Förlag, utgivningsår, omfång ...
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Elsevier BV,2004
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-23360
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-23360URI
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https://doi.org/10.1016/j.apcata.2003.11.001DOI
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20100525
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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.
Ämnesord och genrebeteckningar
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shape selectivity
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4-methylbiphenyl
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methylation
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HZSM-5
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SiO2/Al2O3
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MgO modification
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hydrothermal treatment
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shape-selective alkylation
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polynuclear aromatics
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specialty chemicals
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mfi structure
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naphthalene
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Shen, J. P.
(författare)
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Sun, Licheng
(författare)
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Song, C. S.
(författare)
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Wang, X. S.
(författare)
Sammanhörande titlar
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Ingår i:Applied Catalysis A: Elsevier BV261:2, s. 183-1890926-860X1873-3875
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