Real‐time measurement of axial temperature in a coaxial dielectric barrier discharge reactor and synergistic effect evaluation for in‐plasma catalytic CO<sub>2</sub> reduction
Xiao‐Song Li, Yecheng Li, Liyuan Wang, Jinglin Liu, Ai‐Min Zhu
Abstract
Abstract Due to serious difficulty in the measurement of catalyst‐bed temperature ( T b ) for in‐plasma catalysis (IPC), the evaluation of the IPC synergistic effect is still disputed. Herein, we reported a real‐time measurement of axial temperature ( T ax ), which is much closer to T b than wall temperature ( T w ), using a thermocouple in a catalyst‐packed coaxial dielectric barrier discharge reactor for the first time. In plasma catalytic CO 2 reduction, the effects of discharge power and flow rate on T ax , T w , and CO 2 conversion were examined. On the basis of T ax , compared with the thermal catalytic case, the plasma catalytic case only shows a weak synergistic effect. It was confirmed that the synergistic effect is overestimated if based on T w (except for the heat‐insulated or quasi‐adiabatic reactors).