荧光纳米成像破解工业分子筛催化剂"黑箱":传质-酸性-积炭机理与优化设计OA

The performance of industrial zeolite catalysts,typically exemplified by fluid catalytic cracking(FCC)catalysts,is governed by microscopic behaviors such as mass transfer,acidity and coking.Conventional characterization techniques exhibit limitations in elucidating the structure-performance relationships.So,recent advances in super-resolution fluorescence imaging for deciphering the key microscopic processes are systematically summarized in this review:(1)Mass transfer diffusion behavior:the heterogeneous diffusion of reactant molecules within hierarchical pore networks are revealed;(2)Acid site accessibility:nanoscale localization of acid sites and visualization of their accessibility are achieved;(3)Coking behavior:the spatiotemporal evolution mechanism of coke species on the catalysts are identified.Furthermore,the review elaborates on how super-resolution imaging deepens the understanding of fundamental catalytic mechanisms at the nanoscale,providing theoretical support for the rational design of high-performance catalysts-such as pore structure optimization,acid site regulation,and coking suppression-and concludes with an outlook on current challenges and future directions.