Preparation of VN by reduction nitriding V2O3 with CH4
In this paper,the process conditions and reaction process of using CH4 instead of traditional carbon thermal reduction to prepare VN is explored by combining thermodynamic calculation and ex-perimental process exploration.The results showed that the VN products with nitrogen and carbon con-tents of 14.2％and 3.35％were successfully synthesized under the conditions of CH4 flow rate of 0.1 L/min,heating at 1 150 ℃ for 2 h and continuous nitriding for 2 h,which met the national standard of VN 16(GB/T 20567-2020)for vanadium nitride product.The phase transition process during the re-action is V2O3→V8C7→VN,and the high activated carbon and hydrogen produced by methane decom-position at high temperature are beneficial to the carbonization reaction and effectively improve the re-action rate.
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