本文選題：鈀-金催化劑 + 醋酸乙烯酯��； 參考：《石油化工》2016年11期

【摘要】：采用等體積浸漬法制備了由硫代氨基脲硫醇化改性活性炭負載的鈀-金催化劑,將該催化劑用于乙烯氣相氧化法合成醋酸乙烯酯(VA)的反應(yīng),利用AAS和XPS分析手段對催化劑的組成進行表征,并考察了不同鈀/金質(zhì)量比的催化劑用于乙烯氣相氧化法合成VA的催化活性。實驗結(jié)果表明,當催化劑中鈀/金質(zhì)量比為1.11時,鈀和金元素的負載率最大,分別為89.40%和105.60%,該催化劑在乙烯氣相氧化法合成VA的時空收率和選擇性達最佳值,分別為825.0 g/(L·h)和95.1%。表征結(jié)果顯示,活性組分鈀、金在催化劑上的化學形態(tài)主要是由鈀的氮化物或氧化物和金單質(zhì)組成。
[Abstract]:Palladium-gold catalyst supported on activated carbon modified by thiosemicarbazone was prepared by equal volume impregnation method. The catalyst was used in the synthesis of vinyl acetate via vapor phase oxidation of ethylene. The composition of the catalyst was characterized by AAS and XPS, and the catalytic activity of the catalysts with different PD / au ratios for the synthesis of VA by vapor phase oxidation of ethylene was investigated. The experimental results show that when the mass ratio of palladium to gold is 1.11, the loading ratio of palladium and gold is 89.40% and 105.60%, respectively. The space-time yield and selectivity of the catalyst for the synthesis of VA by vapor phase oxidation of ethylene reach the optimum value of 825.0 g / L 路h) and 95.1%, respectively. The results show that the active components of palladium and gold are mainly composed of nitrides or oxides of palladium and gold on the catalyst.
【作者單位】： 廣西師范學院化學與材料科學學院;貴州省中國科學院天然產(chǎn)物化學重點實驗室;
【分類號】：TQ225.24;O643.36
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本文編號：1882518