期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 53, 期 16, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab6cd1
关键词
ammonia synthesis; dielectric barrier discharge; plasma-catalysis; gamma-Al2O3; reaction mechanisms
资金
- National Natural Science Foundation of China [51976093]
- Natural Science Foundation of Ningbo [2018A610207]
- KC Wong Magna Fund in Ningbo University
In this work, ammonia (NH3) synthesis from N-2 and H-2 was carried out in a packed-bed dielectric barrier discharge (DBD) reactor, while three kinds of commercial packing materials including acidic gamma-Al2O3, alkaline gamma-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 gamma-Al2O3 packed plasma reactor. The improvement of packing materials on plasma-assisted NH3 synthesis followed the order of alkaline gamma-Al2O3 > neutral gamma-Al2O3 > acidic gamma-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.
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