Highly Selective Conversion of Carbon Dioxide to Lower Olefins,ACS Catalysis

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Highly Selective Conversion of Carbon Dioxide to Lower Olefins
ACS Catalysis ( IF 11.3 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acscatal.7b03251
Zelong Li ₁ , Jijie Wang ₁ , Yuanzhi Qu ₁ , Hailong Liu ₁ , Chizhou Tang ₁ , Shu Miao ₁ , Zhaochi Feng ₁ , Hongyu An ₁ , Can Li ₁

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Conversion of CO₂ to value-added chemicals has been a long-standing objective, and direct hydrogenation of CO₂ to lower olefins is highly desirable but still challenging. Herein, we report a selective conversion of CO₂ to lower olefins through CO₂ hydrogenation over a ZnZrO/SAPO tandem catalyst fabricated with a ZnO-ZrO₂ solid solution and a Zn-modified SAPO-34 zeolite, which can achieve a selectivity for lower olefins as high as 80–90% among hydrocarbon products. This is realized on the basis of the dual functions of the tandem catalyst: hydrogenation of CO₂ on the ZnO-ZrO₂ solid solution and lower olefins production on the SAPO zeolite. The thermodynamic and kinetic coupling between the tandem reactions enable the highly efficient conversion of CO₂ to lower olefins. Furthermore, this catalyst is stable toward the thermal and sulfur treatments, showing the potential industrial application.

中文翻译：

二氧化碳高选择性转化为低级烯烃

将CO ₂转化为增值化学品一直是一个长期目标，非常希望将CO ₂直接氢化为低级烯烃，但仍具有挑战性。本文中，我们报告了在用ZnO-ZrO ₂固溶体和Zn改性的SAPO-34沸石制备的ZnZrO / SAPO串联催化剂上通过CO ₂加氢将CO ₂选择性转化为低级烯烃的方法，该方法可实现较低的选择性。在碳氢化合物产品中，烯烃含量高达80-90％。此实现的串联催化剂的双重功能的基础上：CO的氢化₂在ZnO-的ZrO ₂固溶体并降低SAPO沸石上的烯烃产量。串联反应之间的热力学和动力学偶联使得能够将CO ₂高效转化为低级烯烃。此外，该催化剂对热处理和硫磺处理稳定，显示出潜在的工业应用。

更新日期：2017-11-16

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