CO2 hydrogenation to light olefins over Zn–Zr/support-SAPO-34: comparison of different supports†

IF 2.7 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

New Journal of Chemistry Pub Date : 2024-11-05 DOI:10.1039/D4NJ03946G

Peng Lu, Qianwen Hu, Kui Wang, Shiyong Chen, Zongxiao Li, Xinjie Chen, Chuang Xing, Yanhong Wang and Ce Du

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Abstract

The efficient CO₂ conversion to light olefins through hydrogenation is a feasible strategy to achieve carbon neutrality goals. Herein, a series of bimetallic Zn–Zr/supports are synthesized by a conventional impregnation method. We demonstrate that different supports endow catalysts with various specific surface areas, pore sizes, chemical adsorption performances, and acid densities. The effects of different support-loaded Zn–Zr coupled with SAPO-34 on CO₂ hydrogenation to light olefins are investigated systematically. The CO₂ conversion of Zn–Zr/Q10-SAPO-34, Zn–Zr/Q50-SAPO-34, Zn–Zr/γAl₂O₃-SAPO-34, Zn–Zr/MgO-SAPO-34 and Zn–Zr/S-1-SAPO-34 is 11.4%, 9.2%, 24.0%, 8.8%, and 16.2%, respectively, with corresponding light olefin selectivity of 39.0%, 28.1%, 30.4%, 4.8%, and 14.7%, respectively. Significantly, γAl₂O₃ is more conducive to CO₂ conversion, while Q10 tends to produce light olefins. This work provides an effective reference for support selection in CO₂ hydrogenation to light olefins.

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在 Zn-Zr/ 支持物-SAPO-34 上将 CO2 加氢转化为轻质烯烃：不同支持物的比较†。

通过加氢将二氧化碳高效转化为轻质烯烃是实现碳中和目标的可行策略。本文采用传统的浸渍法合成了一系列双金属 Zn-Zr/载体。我们证明，不同的支撑物赋予催化剂不同的比表面积、孔径、化学吸附性能和酸密度。我们系统地研究了不同支撑负载的 Zn-Zr 与 SAPO-34 对 CO2 加氢制轻烯烃的影响。Zn-Zr/Q10-SAPO-34、Zn-Zr/Q50-SAPO-34、Zn-Zr/γAl2O3-SAPO-34、Zn-Zr/MgO-SAPO-34 和 Zn-Zr/S-1-SAPO-34 的 CO2 转化率分别为 11.4%、9.2%、24.0%、8.8% 和 16.2%，相应的轻烯烃选择性分别为 39.0%、28.1%、30.4%、4.8% 和 14.7%。值得注意的是，γAl2O3 更有利于二氧化碳的转化，而 Q10 则倾向于生产轻烯烃。这项工作为二氧化碳加氢制轻烯烃过程中的支撑物选择提供了有效参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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