Selectivity control of H₂/O₂ plasma reaction for direct synthesis of high purity H₂O₂ with desired concentration

Yi, Yanhui, Xu, Chao ORCID: 0000-0003-0787-837X, Wang, Li, Yu, Juan, Zhu, Quanren, Sun, Shuaiqi, Tu, Xin ORCID: 0000-0002-6376-0897, Meng, Changgong, Zhang, Jialiang and Guo, Hongchen (2017) Selectivity control of H₂/O₂ plasma reaction for direct synthesis of high purity H₂O₂ with desired concentration. CHEMICAL ENGINEERING JOURNAL, 313. pp. 37-46.

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Abstract

Low selectivity is one of the key problems which limit the application of plasma in chemical fields. High selectivity and concentration of H2O2are critical in the direct synthesis of H2O2. Herein, we report that the selectivity of the H2/O2plasma reaction can be controlled by specific energy input (SEI), i.e. low SEI leads to high H2O2selectivity. When the SEI was fixed at 2.08 J/ml, the H2O2selectivity reached 91% with 17% O2conversion, and a H2O2solution with high concentration (90 wt.%) was achieved. Plasma diagnostics and theoretical calculation results indicate that, low SEI results in low electron density, which leads to high H2O2selectivity but low O2conversion. Furthermore, the collision cross sections of H2and O2molecules with electrons indicate that the H2/O2plasma, with average electron energy of 1–1.5 eV, can synthesize H2O2with high selectivity and high O2conversion.

Item Type:	Article
Additional Information:	publisher: Elsevier articletitle: Selectivity control of H2/O2 plasma reaction for direct synthesis of high purity H2O2 with desired concentration journaltitle: Chemical Engineering Journal articlelink: http://dx.doi.org/10.1016/j.cej.2016.12.043 content_type: article copyright: © 2016 Elsevier B.V. All rights reserved.
Uncontrolled Keywords:	Plasma chemistry, Hydrogen peroxide, Direct synthesis, Selectivity control, Electron density, Average electron energy
Depositing User:	Symplectic Admin
Date Deposited:	10 Jan 2017 11:00
Last Modified:	12 Oct 2023 09:49
DOI:	10.1016/j.cej.2016.12.043
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3005122