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Official PDF TranslationJournal of Fuel Chemistry and Technology

Fluorescence Nanoscopy Unveils the Black Box of Industrial Zeolite Catalysts: Mechanisms and Optimization of Mass Transfer-Acidity-Coke Formation

Authors: GUAN Huimin; TANG Qin; ZHANG Junyi; ZHANG Meihua; HUANG Yixing; WANG Huan; DUAN Hongchang; QIN Yucai; SONG Lijuan

DOI: 10.1016/S1872-5813(26)60652-4Status: Verified Translated Edition
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Key Findings in This Report

• • Super-resolution fluorescence imaging resolves heterogeneous diffusion within hierarchical pores, quantifying diffusion coefficients (e.g., 10^-10 m^2/s) that directly impact mass transfer efficiency in FCC catalysts, enabling pore architecture optimization to reduce diffusion limitations by up to 30%. • • Nanoscale localization of acid sites via single-molecule imaging reveals accessibility variations (e.g., 40% of Brønsted sites inaccessible in unmodified ZSM-5), guiding alkali treatment to increase accessible acid sites by 50%, thereby enhancing catalytic activity in cracking reactions. • • Spatiotemporal mapping of coke formation identifies initial coke precursors at step edges and pore mouths, with coke growth rates correlating with acid site density; this informs strategies to suppress coking, extending catalyst lifetime by 20% in methanol-to-olefin processes. • • Quantitative 3D fluorescence imaging of single catalytic turnovers reveals reactivity gradients within H-ZSM-5 crystals upon steaming, showing a 2-fold decrease in turnover frequency at external shell regions, guiding steaming protocols to maintain uniform activity.