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以 S2 O2 - 8 浸渍无定形 Zr(OH) 4 ,制得较 SO2 - 4/Zr O2 酸性更强的固体超强酸 .用正丁烷异构化反应考察了 S2 O2 - 8/Zr O2 的酸性 .结果表明 ,在对 Zr O2 有促进作用的非卤素阴离子中 ,S2 O2 - 8是最好的促进剂 .最佳焙烧条件下 S2 O2 - 8/Zr O2 固体超强酸比 SO2 - 4/Zr O2 的酸性更强 .3 5℃下 ,S2 O2 - 8/Zr O2 上正丁烷异构化反应速率较 SO2 - 4/Zr O2 提高了 1 .2倍 .反应 2 0 h后的正丁烷转化率提高了约 1 .5倍 .用 XRD、TEM和化学分析等手段分析了 S2 O2 - 8/Zr O2 体系的晶化过程、比表面和含硫量 .结果表明 ,与 SO2 - 4/Zr O2 体系形成的固体超强酸的过程类似 ,晶化温度、比表面和含硫量均明显影响 S2 O2 - 8/Zr O2 的酸性强弱 .S2 O2 - 8/Zr O2 的最佳焙烧温度比SO2 - 4/Zr O2 低 5 0℃ ,在 5 0 0～ 80 0℃焙烧的 S2 O2 - 8/Zr O2 可形成纳米级固体超强酸 .
The acidity of S2 O2 - 8 / Zr O2 was investigated by the isomerization of n - butane over acidic SO2 - 4 / ZrO2 impregnated amorphous Zr (OH) 4 with S2 O2 - The results showed that S2 O2 - 8 was the best accelerator among the non - halogen anions which promoted the ZrO2. Under the optimal calcination conditions, the molar ratio of S2 O2 - 8 / ZrO2 solid superacid to SO2 - 4 / Zr O2 Is more acidic.3 The isomerization rate of n-butane over S2 O2 - 8 / Zr O2 was increased by 1.2 times at 5 ℃ compared with that of SO2 - 4 / ZrO2.The n-butane conversion The ratio of SO2-4 / ZrO2 was increased by about 1.5 times.The crystallization process, specific surface area and sulfur content of S2 O2 - 8 / Zr O2 system were analyzed by means of XRD, TEM and chemical analysis, The process of forming solid superacid is similar, and the crystallization temperature, specific surface area and sulfur content obviously affect the acidity of S2 O2 - 8 / Zr O2.The optimum calcination temperature of S2 O2 - 8 / Zr O2 is lower than that of SO2 - 4 / Zr O2 low 5 0 ℃, at 550 ~ 80 0 ℃ calcined S2 O2 - 8 / Zr O2 can form nano-level solid superacid.