Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
Please note that all times are shown in the time zone of the conference. The current conference time is: 24th Aug 2026, 05:31:27am America, Santiago
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Daily Overview |
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Work in Progress (WP) In-Person Location: Room 07: Antartica | |
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Synthesis of ZSM-5 zeolite by the seed assisted method, and its use for the ethanol dehydration reaction 1: Universidad de La Salle - (CO), Colombia; 2: Universidad de La Sabana - (CO) ZSM-5 zeolite was synthesized through a seed-assisted hydrothermal method as a sustainable alternative to conventional OSDA-based routes and evaluated for ethanol dehydration to ethylene. The synthesis employed tetraethyl orthosilicate as silicon source, sodium aluminate as aluminum source, and commercial ZSM-5 seeds with different Si/Al ratios. The influence of crystallization time on morphology and phase purity was examined by SEM and X-ray diffraction. Well-defined MFI crystals were obtained after 72 h of hydrothermal treatment, while longer synthesis times led to the appearance of minor extra-framework silica phases. The catalytic performance of the H-ZSM-5 samples was evaluated in a fixed-bed reactor between 150 and 550 °C. The catalyst exhibited clear temperature-dependent behavior, achieving moderate ethanol conversion and ethylene formation at 550–500 °C, confirming the presence of active Brønsted acid sites. However, incomplete conversion at the highest temperature suggests limitations associated with acid site density and/or mass-transfer constraints. Overall, the seed-assisted route produced active ZSM-5 catalysts while avoiding organic templates, demonstrating potential as a more sustainable pathway for ethylene production from bioethanol. | |