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采用射频辉光放电等离子体技术制备了用于天然气部分氧化制合成气反应的α Al2 O3担载金属Ni催化剂。考察了该催化剂的反应活性、稳定性 ,并与常规方法制备的催化剂进行了比较。结果表明 ,采用等离子体技术制备的催化剂 ,具有操作简便、工艺流程短、催化剂变化过程直观易控、催化剂活性高、稳定性好等优点 ,在 850℃反应时可获得 98 2 %天然气转化率 ,97 3%H2 选择性和 96 5%CO选择性 ,并且反应 1 5h后催化剂活性几乎未下降。XRD和TPR实验结果表明 ,采用等离子体技术制备的催化剂的晶相组成和还原性能与常规催化剂有很大差别。
The α Al 2 O 3 supported metal Ni catalyst for partial oxidation of natural gas to synthesis gas was prepared by RF glow discharge plasma. The reactivity and stability of the catalyst were investigated and compared with the catalysts prepared by conventional methods. The results show that the catalyst prepared by plasma technology has the advantages of simple operation, short process flow, easy and direct control of catalyst changing process, high catalyst activity and good stability. The conversion of 98 2% natural gas at 850 ℃ can be obtained. 97 3% H2 selectivity and 96 5% CO selectivity, and the activity of the catalyst hardly changed after 15 h reaction. The results of XRD and TPR show that the phase composition and reduction performance of the catalysts prepared by plasma are different from those of conventional catalysts.