低温陈化粉煤灰负载SO42-/ZrO2固体超强酸的制备与表征

固体超强酸的研制是近二十年来催化领域中的热点研究课题之一。尤其是近几年，研究者们为得到高酸强度和高催化活性的固体超强酸催化剂，常以ZrO2为主体，引入第二组分、第三组分组成复合型催化剂，这方面的研究者颇多，但所获得的催化剂的催化活性尚不能令人满意，催化剂的储存稳定性和重复使用性能方面也还存在一些问题，以致于使其推广应用受到了限制。为了解决这些问题，

The preparation and the Characterization of Fly Ash Loading SO42-/ZrO2 Solid Superacid Aged at Low Temperature

The fly ash loading SO_4~(2-)/ZrO_(2)solid superacid samples have been prepared by ageing at low temperature. The acidity of samples were determined with flowing indicator method, and the characterization of the samples were performed by IR and XPS. The samples were used in the esterification between lactic acid and n-butyl alcohol. The results show that the sample aged at low temperature have better performance comparing with others samples aged at room temperature, the absorption peak of S=O bond in IR spectra has been strengthened remarkably; The peak position of Zr3d in XPS speetra have a bigger chemical shift. The process of ageing at low temperature is responsible for the stronger acidity and higher activity of FZ samples.