Potter, Matthew, Armstrong, Lindsay-Marie, Carravetta, Marina, Mezza, Thomas and Raja, Robert (2020) Designing multi-dopant species in microporous architectures to probe reaction pathways in solid-acid catalysis. Frontiers in Chemistry, 8, 1-13, [171]. (doi:10.3389/fchem.2020.00171).
Abstract
The introduction of two distinct dopants in a microporous zeotype framework can lead to the formation of isolated, or complementary catalytically active sites. Careful selection of dopants and framework topology can facilitate enhancements in catalysts efficiency in a range of reaction pathways, leading to the use of sustainable precursors (bioethanol) for plastic production. In this work we describe our unique synthetic design procedure for creating a multi-dopant solid-acid catalyst (MgSiAPO-34), designed to improve and contrast with the performance of SiAPO-34 (mono-dopant analogue), for the dehydration of ethanol to ethylene. We employ a range of characterisation techniques to explore the influence of magnesium substitution, with specific attention to the acidity of the framework. Through a combined catalysis, kinetic analysis and computational fluid dynamics (CFD) study we explore the reaction pathway of the system, with emphasis on the improvements facilitated by the multi-dopant MgSiAPO-34 species. The experimental data supports the validation of the CFD results across a range of operating conditions; both of which supports our hypothesis that the presence of the multi-dopant solid acid centres enhances the catalytic performance. Furthermore, the development of a robust computational model, capable of exploring chemical catalytic flows within a reactor system, affords further avenues for enhancing reactor engineering and process optimisation, towards improved ethylene yields, under mild conditions.
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- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Southampton Marine & Maritime Institute (pre 2018 reorg)
- Current Faculties > Faculty of Engineering and Physical Sciences > School of Chemistry > Magnetic Resonance
School of Chemistry > Magnetic Resonance - Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Mechanical Engineering > Energy Technology Group
Mechanical Engineering > Energy Technology Group - Current Faculties > Faculty of Engineering and Physical Sciences > School of Chemistry > Functional Inorganic, Materials and Supramolecular Chemistry
School of Chemistry > Functional Inorganic, Materials and Supramolecular Chemistry
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