Ni/Al_2O_3催化剂上甲烷部分氧化制合成气

Catalytic Activity of Ni/ α Al 2O 3 for Partial Oxidation of Methane to Synthetic Gas

研究了Ｎｉ／Ａｌ２Ｏ３催化剂对甲烷部分氧化制合成气的反应性能．结果表明，催化剂在其活性组份Ｎｉ为１０％时反应性能最好．条件实验表明，在６００～９００℃范围内，甲烷转化率和ＣＯ、Ｈ２的选择性随温度升高而增加；转化率和选择性在甲烷空速≤１．５×１０５ｈ－１时基本不变，空速＞１．５×１０５ｈ－１时，转化率和选择性有所下降．随着压力的增加（０．０５～０．４０ＭＰａ），转化率和选择性下降．ＳＥＭ和化学分析结果证明在反应过程中，Ｎｉ组份存在烧结和流失现象．

The catalytic activity of Ni/ α Al 2O 3 for partial oxidation of methane to synthesis gas has been studied. It is found that the catalyst of 10% Ni content was the best one for partial oxidation of methane under the conditions of 600￣900℃ reaction temperature, 0 05 MPa pressure, a high space velocity of methane, and CH 4/O 2=2 0. Under the conditions used the methane conversion and the selectivity of CO and H 2 were increased with increase of temperature (600￣900℃) and decreased with increase of pressure(0 05 MPa￣0 4 MPa) the space velocity influenced the catalyst activity. During the reaction, Ni component was found to be sintered and diminished, as confirmed by SEM observations and chemical analysis.