Effect of Synthesis Methods and Modification Treatments of ZSM-5 on Light Alkane Aromatization
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Viswanadham,N
Gupta,J.K Murali Dhar,G Garg,M.O |
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| Date |
2009-07-01T10:53:13Z
2009-07-01T10:53:13Z 2009-07-01T10:53:13Z |
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| Identifier |
Energy & Fuels 2006, 20, 1806-1814
http://hdl.handle.net/123456789/282 |
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| Description |
ZSM-5 samples were prepared by hydrothermal synthesis from template-free (TF) and templated (HZ) gel
media. The HZ samples were hydrothermally dealuminated to different levels (from HZS-1 to HZS-4). The
physicochemical properties of the samples were characterized by X-ray diffraction analysis (XRD), X-ray
fluorescence, microcalorimetry, and 29Si and 27Al nuclear magnetic resonance, and their catalytic performance
was evaluated for n-heptane aromatization. The samples exhibited considerable differences in catalytic properties
such as acidity and aromatic product selectivities in n-heptane conversion. The TF sample exhibited slightly
lower XRD crystallinity and surface area than HZ but possessed comparable aromatic selectivity, except for
a slight variation in product distribution, including a greater selectivity for C9
+ aromatics. Among the
dealuminated samples, the sample steamed at 673 K (HZS-2), exhibited the presence of very strong acid sties,
and enhanced aromatic yields when compared to parent HZ and other dealuminated catalysts. The performance
of HZS-2 was also high in the aromatization of other n-paraffins, such as n-hexane, n-octane, and the feedstocks,
natural gas liquids (NGL) and light naphtha (LN). The aromatization selectivity of the catalysts was found to
be in the order, HZS-4 < HZS-3 < HZ < HZS-1 < HZS-2.
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| Language |
en_US
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| Subject |
Alkane
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| Title |
Effect of Synthesis Methods and Modification Treatments of ZSM-5 on Light Alkane Aromatization
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| Type |
Article
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