Ammonia synthesis over γ-Al<sub>2</sub>O<sub>3</sub> pellets in a packed-bed dielectric barrier discharge reactor



Zhu, Xinbo, Hu, Xueli, Wu, Xiqiang, Cai, Yuxiang, Zhang, Hongbin and Tu, Xin ORCID: 0000-0002-6376-0897
(2020) Ammonia synthesis over γ-Al<sub>2</sub>O<sub>3</sub> pellets in a packed-bed dielectric barrier discharge reactor. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 53 (16). p. 164002.

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Abstract

In this work, ammonia (NH3) synthesis from N2 and H2 was carried out in a packed-bed dielectric barrier discharge (DBD) reactor, while three kinds of commercial packing materials including acidic γ-Al2O3, alkaline γ-Al2O3 and neutral alumina pellets were employed. The effect of packing materials on plasma-assisted NH3 synthesis was investigated and compared with an unpacked DBD reactor. The results show that the presence of packing materials enhanced the plasma-assisted NH3 synthesis by 15.6% to 44.4% compared to the plasma reaction without a packing. The highest NH3 concentration of 1565.5 ppm was obtained over the alkaline γ-Al2O3 packed plasma reactor. The improvement of packing materials on plasma-assisted NH3 synthesis followed the order of alkaline γ-Al2O3 > neutral γ-Al2O3 > acidic γ-Al2O3 > blank tube only. A series of characterizations were performed to illustrate the structure-performance relationships between plasma-induced NH3 synthesis process and packing materials. The results showed that the basicity of the packing materials played an important role in the plasma-assisted NH3 synthesis process. The reaction mechanisms of NH3 synthesis in the packed-bed DBD reactor were also discussed.

Item Type: Article
Uncontrolled Keywords: ammonia synthesis, dielectric barrier discharge, plasma-catalysis, gamma-Al2O3, reaction mechanisms
Depositing User: Symplectic Admin
Date Deposited: 02 Mar 2020 10:33
Last Modified: 14 Oct 2023 11:42
DOI: 10.1088/1361-6463/ab6cd1
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3077357