Influences of Mesoporosity Generation in ZSM-5 and Zeolite Beta on Catalytic Performance During <Emphasis Type="Italic">n</Emphasis>-Hexane Isomerization |
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| Authors: | Bharat K Modhera Mousumi Chakraborty Hari C Bajaj Parimal A Parikh |
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| Affiliation: | (1) Chemical Engineering Department, S.V. National Institute of Technology, Surat, 395007, India;(2) Discipline of Inorganic and Materials Catalysis, Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar, 364021, India;(3) Present address: Chemical Engineering Department, M.A. National Institute of Technology, Bhopal, 462 051, India; |
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| Abstract: | Abstract Catalytic performance of Pt impregnated parent and desilicated nano-crystalline zeolites, ZSM-5 and Beta for n-hexane isomerization was studied. Difference in channel systems of the zeolites and absence/presence of mesopores therein
were found to be reflected in product distributions. ZSM-5 was desilicated by NaOH and zeolite Beta with tetramethylammonium
hydroxide (TMAOH.) Desilication was found to afford comparable catalytic performance to that of the parent counterpart at
reaction temperature lower by 25 °C. Observed product distributions could be substantiated with characterizations such as
ammonia TPD, surface area determination and SEM. Desilicated zeolite Beta was seen to be less prone to coking as deduced from
the TGA study. Location of Pt with reference to proton sites within the channels and that inside the pores viz a viz external
surface also have been discussed briefly. |
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