Journal
FUEL
Volume 135, Issue -, Pages 105-111Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2014.06.045
Keywords
Catalytic cracking; Naphtha; Zeolites; ZSM-23 (MTT); Microwave-assisted alkaline treatment
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Funding
- King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM), National Science, Technology and Innovation Plan [10-NAN1391-04]
- New Energy and Industrial Technology Development Organization (NEDO)
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Catalytic cracking of naphtha over one-dimensional (1D) pore zeolite was targeted by using n-hexane as a model compound. Novel hierarchical H-ZSM-23 (MTT), a 1D pore zeolite, was specially designed to maximize propylene yield from catalytic cracking. Very high propylene-to-ethylene ratio of 2.5 was achieved. The ZSM-23 with mesopores displayed an enhanced deactivation resistance compared to microporous parent crystals. Hierarchical ZSM-23 was synthesized rapidly by applying microwave-assisted hydrothermal synthesis (MAHyS) followed by microwave-assisted alkaline treatment and moderate acid treatment. Pore volume of hierarchical ZSM-23 was improved considerably compared with the ones of parent crystals. Physico-chemical properties of hierarchical ZSM-23 were studied by characterization techniques such as XRD, FE-SEM, N-2 adsorption-desorption, Al-27 and Si-29 MAS NMR, NH3-TPD, and TEM. (C) 2014 Elsevier Ltd. All rights reserved.
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