Research on Performance of ZrTiNiMn Alloy for Decomposition of Methane in Hydrogen AITranslate

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Chinese Library Classification Number:TG139.7[一般工业技术—材料科学与工程]

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Tritiated methane is a typical tritiated impurity in tritium-containing gases,which is characterized with low chemical activity and difficult to decompose.The methane decomposition ability of ZrTiNiMn alloy was tested at different reaction temperatures(500~700 ℃) with hydrogen containing 1.01% and 0.2% methane,and gas flow rate was controlled at 0.1~1 SLM.The surface morphologies,composition and phase structure of ZrTiNiMn alloy before and after reaction were analyzed by SEM,EDS and XRD.The results show that for the hydrogen containing 1.01% and 0.2% methane,ZrTiNiMn alloy hardly reacts with methane below 500 ℃,but efficiently decomposes methane by over 94% at 650 ℃ when the gas flow rate is 0.2 SLM.Generally,the decomposition rate of methane can be improved by decreasing the concentration of methane in feedstock,increasing the reaction temperature and decreasing the gas flow rate.The reaction products of ZrTiNiMn alloy with methane include hydrogen and solid products such as elemental carbon and metal carbide.