SO_4^(2-)/ZrO_2-SiO_2固体酸催化剂的研究

STUDIES ON SO_4^(2-)/ZrO_2-SiO_2 SOLID ACID CATALYST

用XRD、BET、Hammett指示剂法及乙酸乙酯化反应等手段研究了引入SiO2 对SO2 -4 /ZrO2体系的晶化、比表面、酸强度和催化性能的影响。添加SiO2 会延迟ZrO2 的晶化 ,减弱SO2 -4 /ZrO2 的超强酸性 ,但有利于提高催化剂的酯化反应活性。

The effect of adding SiO_2 into ZrO_2 on the crystallization,surface area,acid strength and catalytic activity was studied in detail by means of XRD、BET、Hammett indicator method,and esterification of ethanol with acetic acid.Adding SiO_2 into ZrO_2 retarded the crystallization,and decreased solid superacidity of SO2-_4/ZrO_2,but increased the catalytic activities of SO2-_4/ZrO_2 for acetic acid esterification.