Understanding zeolite deactivation by sulfur poisoning during direct olefin upgrading

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  • Article | | open

    The deactivation of zeolite catalyst by sulfur contaminants is a major problem in direct olefin upgrading of crude oil. Here the authors perform mechanistic analyses of zeolite ZSM-5 catalysts to reveal the detrimental effect of sulfur on silver and gallium Lewis acid sites in the catalyst.

    • Jonathan H. Harrhy
    • , Aiguo Wang
    • , Jack S. Jarvis
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    • , Shijun Meng
    • , Matthew Yung
    • , Lijia Liu
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  • Article | | open

    Polyphenols are widely studied as potential drugs for Alzheimer’s disease, but their development is limited by poor bioavailability. Here polyphenolic analogues of the Alzheimer's disease drug rivastigmine are shown to inhibit both cholinesterase and amyloid beta fibrillation in vitro and in vivo in a C. elegans model, providing a potentially general route for the development of polyphenol-based drugs.

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