生态设计的ZSM-5沸石:通过模型反应进行生物质辅助修饰和催化评价

Camille Longue, Anne Bolmont, Valérie Ruaux, Aurélie Vicente, Nourrdine Chaouati, Marie Desmurs, Benoît Louis and Ludovic Pinard
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引用次数: 0

摘要

本研究评价了生物质添加对ZSM-5分子筛理化性质的影响。采用水热法合成了三种沸石:不含生物质的参考沸石、含木质素的沸石和木质素与甘蔗渣结合的沸石。生物质已被证明可以通过减小晶体尺寸来改变沸石结构,有利于铝在框架内的掺入,并减少作为内部硅烷醇的缺陷的数量。这些修饰是由于生物质和溶液中无机前体之间的化学相互作用造成的。分析了这些分子筛在正己烷裂解和甲醇制烯烃反应中的催化性能。由生物质合成的沸石由于扩散路径的增强,对轻质烯烃的催化稳定性和选择性得到了提高。特别是木质素有助于减少结构缺陷,从而提高催化剂的寿命。在利用可再生和丰富的资源的同时,生物质的加入为定制沸石性能提供了显著的优势。这种创新的方法为催化材料的可持续设计开辟了有趣的前景。它还使农业和工业废物能够回收到高附加值的应用中,加强绿色化学与工业绩效之间的联系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Eco-designed ZSM-5 zeolites: biomass-assisted modifications and catalytic evaluation through model reactions

This study evaluates the impact of biomass addition on the physicochemical properties of ZSM-5 zeolites. Three families of zeolites were synthesized hydrothermally: a reference zeolite without biomass, one with lignin, and another combining lignin and sugarcane bagasse. Biomass has been shown to modify the zeolite structure by reducing the crystal size, favouring aluminium incorporation within the framework and reducing the number of defects as internal silanols. These modifications are attributed to the chemical interactions between biomass and inorganic precursors present in solution. The catalytic performance of these zeolites was analysed in n-hexane cracking and in the methanol to olefin (MTO) reactions. Zeolites synthesized with biomass demonstrated improved catalytic stability and selectivity towards light olefins, thanks to an enhanced diffusion path. Lignin, in particular, helped minimize structural defects, thus improving the catalyst lifetime. The addition of biomass offers significant advantages for tailoring zeolite properties while using renewable and abundant resources. This innovative approach opens up interesting prospects for the sustainable design of catalytic materials. It also enables agricultural and industrial wastes to be recycled into high value-added applications, strengthening the links between green chemistry and industrial performance.

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