The transformation of 1,2,4-trimethylbenzene A probe reaction to monitor external surface modifications of HZSM-5?
Journal Article
1997
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Microporous Materials
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Elsevier
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University of Cape Town
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Abstract
The transformation of 1,2,4-trimethylbenzene is proposed as a new probe reaction to monitor the catalytic effects of inertisation of the external surface of HZSM-5. The external surface has been modified by coating ZSM-5 crystallites with an inert silicalite shell. At 723 K and a WHSV of 0.6 h−1 it has been shown that the isomerisation products 1,2,3-trimethylbenzene and 1,3,5-trimethylbenzene reflect changes in external activity. The disproportionation products, 1,2,4,5-tetramethylbenzene and 1,2,3,5-tetramethylbenzene together are shown to indicate changes in overall activity and shape selective properties of the catalyst sample. The results correlate with those observed for the reaction of 1,3,5-triisopropylbenzene and n-hexane cracking.
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Reference:
Röger, H. P., Möller, K. P., & O'Connor, C. T. (1997). The transformation of 1, 2, 4-trimethylbenzene A probe reaction to monitor external surface modifications of HZSM-5?. Microporous materials, 8(3), 151-157.