【摘要】 通过沉淀-浸渍法制备一系列氧化物S2O82-/ZrO2-MxOy(M=Al,Fe,Si)固体超强酸催化剂,用乙酸和异丁醇的酯化反应研究制备条件对催化剂活性的影响.实验结果表明,添加不同的氧化物对催化剂的酯化反应催化活性有不同的影响.其中n(Zr)∶n(Si)=1∶3的催化剂对乙酸和异丁醇的酯化反应具有很高的催化活性.用XRD、SEM、IR和化学分析等手段分析S2O82-/ZrO2-MxOy(M=Al,Fe,Si)体系的晶化过程、比表面积、含硫量.结果表明,晶化温度、比表面积和含硫量均明显影响S2O82-/ZrO2-MxOy(M=Al,Fe,Si)体系的酸性强弱.更多还原

【Abstract】 A series of new type of solid superacid catalysts S2O82-/ZrO2MxOy(M=Al,Fe,Si) by MxOy was prepared successfully by the method of precipitation-impregnation.The catalytic activity was affected by prepared condition through esterification reaction of acetic acid and isobutyl alcohol.Experimental results showed that different MxOy on the catalyst had different effect.It was found that S2O82-/ZrO2-SiO2 (n(Zr)∶n(Si)=1∶3) had the highest catalytic activity.Process of crystal formation,surface area and sulfur content of S2O82-/ZrO2-MxOy was analysed by XRD,SEM and IR techniques and chemical analysis.Experimental results showed that acid strength of S2O82-/ZrO2-MxOy was influenced by crystal formation,surface area and sulfur content.更多还原