γ-Al₂O₃Supported SO₄^2&#45/ZrO₂Solid Superacid Catalysts for n-Pentane Isomerization

A solid superacid catalyst Pt-SO42-/ZrO2-A12O3 for n-pentane isomerization, was prepared by incipient-wetness impregnation. Preparetion conditions, namely, calcination temperature, concentration of sulfuric acid solution used in impregnation and Al2O3 concentration, were varied to investigate the effects on catalytic performance of Pt-SO42-/ZrO2-A12O3. The results showed that the PtSZA catalyst exhibited excellent catalytic performance for n-pentane isomerization. Under optimized preparation conditions of calcination temperature of 650°C, reaction time for 3 h, concentration of sulfuric acid solution for 0.5 mol/L, 30% of Al2O3 concentration and 0.3% of Pt concentration, the n-pentane conversion and isopentane selectivity of Pt-SO42-/ZrO2-A12O3 could reach up to 62.17% and 91.60%, respectively.

SO_4^(2-)/γ-Al_2O_3固体超强酸催化地沟油制备生物柴油

以硫酸铵﹑γ-Al_2O_3为原料,成功制备了SO_4^(2-)/γ-Al_2O_3固体超强酸,并将其用于催化地沟油合成生物柴油,考虑了醇油物质的量比﹑催化剂用量﹑反应温度和反应时间等工艺条件对生物柴油产率的影响,研究得出,在催化剂用量0.5%﹑醇油比为1∶6﹑反应温度为60℃﹑反应时间为4h,生物柴油的产率达到了80%。