Real‐time measurement of axial temperature in a coaxial dielectric barrier discharge reactor and synergistic effect evaluation for in‐plasma catalytic CO2 reduction. Issue 5 (31st January 2022)

• Record Type: Journal Article
• Authors: Li, Xiao‐Song; Li, Ye‐Cheng; Wang, Li‐Yuan; Liu, Jing‐Lin; Zhu, Ai‐Min
• Is Part Of: Plasma processes and polymers. Volume 19:Issue 5(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-31
• Subjects: CO2 conversion -- dielectric barrier discharge -- plasma catalysis -- synergistic effect; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.202100229
• Languages: English
• ISSNs: 1612-8850

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 CO2 reduction, the effects of discharge power and flow rate on T ax, T w, and CO2 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). Abstract : In‐plasma catalysis (IPC) is expected to achieve synergistic effect between plasma and catalyst. However, due to measurement difficulty of catalyst‐bed temperature ( T b ) for IPC, the evaluation of synergistic effect is still disputed. We report a real‐time measurement of axial temperature ( T ax ), being much close to T b, by a thermocouple in a catalyst‐packed coaxial dielectric barrier discharge reactor. Thereby, the synergistic effect was assessed based on the T ax in CO2 reduction with H2 .