武汉大学Abhishek Dutta Chowdhury团队报道了由沉淀碳酸钙衍生的Ca/ZSM-5沸石在甲醇制烯烃过程中的效能。相关研究成果于2024年3月6日发表于国际顶尖学术期刊《结构化学》。

在环境意识增强和对轻质烯烃需求不断增长的背景下，该研究探索了利用可再生资源可持续生产轻质烯烃的前景。轻烯烃（尤其是丙烯）是石化行业的关键组成部分，其需求将在各个行业（如电动汽车、消费品、包装行业）的推动下稳步增长，而这些行业不应仅依赖传统的石油主导路线。因此，可持续的途径，如沸石催化的甲醇制烯烃（MTO）工艺，正受到关注。

为了将未来的烯烃需求与“甲醇经济性”的概念相结合，本文研究了使用沉淀碳酸钙（PCC）作为硬模板，成本效益高的方法合成多级Ca/ZSM-5沸石，从而获得优异的催化性能。采用综合表征技术来阐明催化剂的性能，强调了介孔性和钙物种在优化其性能方面的双重重要性。Operando光谱学为其增强的抗焦化特性提供了深入的见解。

该项研究有助于扩大沸石催化MTO工艺的催化剂工具包，重点关注丙烯生产，从而解决对轻质烯烃日益增长的需求，同时促进可持续性和循环经济原则。

附：英文原文

Title: Efficacy of Ca/ZSM-5 zeolites derived from precipitated calcium carbonate in the methanol-to-olefins process

Author: Xinyu You, Xin Zhang, Shican Jiang, Yiru Ye, Lin Gu, Hexun Zhou, Pandong Ma, Jamal Ftouni, Abhishek Dutta Chowdhury

Issue&Volume: 2024-03-06

Abstract: In the context of heightened environmental consciousness and the growing demand for light olefins, this study explores the promising future prospects for their sustainable production from renewable resources. Light olefins (especially propylene) are a pivotal constituent of the petrochemical industry, and their demand is poised for steady growth driven by various sectors (e.g., electric mobility, consumer goods, packaging industries), which should not rely solely on traditional petroleum-led routes. Therefore, sustainable pathways, such as the methanol-to-olefin (MTO) process catalyzed by zeolites, are gaining attention. Intending to couple the future olefin demands with the concept of a "methanol economy", this study investigates the synthesis of hierarchical Ca/ZSM-5 zeolites using a cost-effective approach involving Precipitated Calcium Carbonate (PCC) as a hard template, leading to superior catalytic performance. Comprehensive characterization techniques are employed to elucidate the catalyst's properties, highlighting the dual importance of mesoporosity and calcium species in optimizing its performance. Operando spectroscopy provides in-depth insights into its enhanced anti-coking characteristic. This research contributes to expanding the catalyst toolkit for zeolite-catalyzed MTO processes, focusing on propylene production, thereby addressing the increasing demand for light olefins while promoting sustainability and circular economy principles.

DOI: 10.1016/j.cjsc.2024.100265

Source: http://cjsc.ac.cn/cms/issues/579