Direct and Oriented Conversion of CO<sub>2</sub> into Value‐Added Aromatics

  • Yang Wang
    Department of Applied Chemistry, Graduate School of Engineering University of Toyama Gofuku 3190 Toyama 930-8555 Japan
  • Weizhe Gao
    Department of Applied Chemistry, Graduate School of Engineering University of Toyama Gofuku 3190 Toyama 930-8555 Japan
  • Shun Kazumi
    Department of Applied Chemistry, Graduate School of Engineering University of Toyama Gofuku 3190 Toyama 930-8555 Japan
  • Hangjie Li
    Department of Applied Chemistry, Graduate School of Engineering University of Toyama Gofuku 3190 Toyama 930-8555 Japan
  • Guohui Yang
    Department of Applied Chemistry, Graduate School of Engineering University of Toyama Gofuku 3190 Toyama 930-8555 Japan
  • Noritatsu Tsubaki
    Department of Applied Chemistry, Graduate School of Engineering University of Toyama Gofuku 3190 Toyama 930-8555 Japan

Abstract

<jats:title>Abstract</jats:title><jats:p>The oriented conversion of CO<jats:sub>2</jats:sub> into target high‐value chemicals is an effective way to reduce carbon emissions, but still presents a challenge. In this communication, we report the oriented conversion of CO<jats:sub>2</jats:sub> into value‐added aromatics, especially <jats:italic>para</jats:italic>‐xylene, in a single pass by combining core–shell structured Zn‐doped H‐ZSM‐5 (Zn‐ZSM‐5@SiO<jats:sub>2</jats:sub>) and a Cr<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> component. Through precise regulation of the acidity of Zn‐ZSM‐5@SiO<jats:sub>2</jats:sub>, high <jats:italic>para</jats:italic>‐xylene selectivity (38.7 % in the total products) at a CO<jats:sub>2</jats:sub> conversion of 22.1 % was achieved. Furthermore, a CO<jats:sub>2</jats:sub>‐assisted effect in the synthesis of aromatics during the tandem process has been clarified through a control experiment. The CO<jats:sub>2</jats:sub> reactant can act as a hydrogen acceptor to accelerate the dehydrogenation of alkenes, intermediates in the synthesis of aromatics, thereby increasing the driving force towards aromatics in the tandem reaction process.</jats:p>

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