Imaging Catalysis: Operando Investigation of the CO2 Hydrogenation Reaction Dynamics by Means of Infrared Thermography,ACS Catalysis

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Imaging Catalysis: Operando Investigation of the CO2 Hydrogenation Reaction Dynamics by Means of Infrared Thermography
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-01-10 , DOI: 10.1021/acscatal.9b04475
Robin Mutschler _{1,

2} , Emanuele Moioli _{1,

2} , Kun Zhao _{1,

2} , Loris Lombardo _{1,

2} , Emad Oveisi ₃ , Alessandro Porta ₄ , Leonardo Falbo ₄ , Carlo Giorgio Visconti ₄ , Luca Lietti ₄ , Andreas Züttel _{1,

2}

Affiliation

Infrared thermography is a powerful tool to investigate the dynamic evolution of temperature in chemical reactions. The CO₂ hydrogenation reaction is an ideal model reaction to assess the presented technique due to its high exothermicity. Various dynamic experiments are performed in a newly designed reaction cell with an infrared transmitting ZnSe window. In particular, the gas exchange reactions between CO₂ and H₂, the coinjection of the two reactants, and the study of the effect of inert gas addition are investigated. Here, we show that the reaction rate on the surface of a catalyst can be localized in time and space by means of infrared thermography. This opens the way to the precise description of reaction dynamics, in particular for reactions operating in intermitting conditions. Furthermore, we show that the combination of infrared thermography with other analytic techniques such as rapid and quantitative mass spectrometry enables a holistic understanding of the transient reaction phenomena.

中文翻译：

成像催化：红外热成像技术对CO ₂加氢反应动力学的操作研究

红外热成像是研究化学反应中温度动态变化的有力工具。由于其高放热性，CO ₂加氢反应是评估所提出技术的理想模型反应。在新设计的带有红外透射ZnSe窗口的反应池中进行了各种动态实验。特别地，CO ₂和H ₂之间的气体交换反应，两种反应物的共注入以及惰性气体添加效果的研究。在此，我们表明，借助红外热成像技术，催化剂表面的反应速率可以在时间和空间上进行定位。这为精确描述反应动力学开辟了道路，特别是对于在间歇条件下运行的反应。此外，我们证明了红外热成像技术与其他分析技术（例如快速和定量质谱分析）的结合，使您能够全面了解瞬态反应现象。

更新日期：2020-01-10

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