载体制备方法对合成甲醇催化剂的影响

通过比较以超临界干燥法和以普通空气中干燥得到的氧化锆为载体的ＣｕＯ／ＺｒＯ２催化剂，发现前者对ＣＯ／２Ｈ２合成甲醇的活性优于后者。ＸＲＤ和ＴＰＲ结果表明以超界干燥法制得的氧化锆为载体的催化剂ＣｕＯ的分散度比空气中干燥所得的氧化锆为载体的催化剂高。

COMPARATIVE STUDY OF CuO/ZrO_2 CATALYSTS WITH THE SUPPORT PREPARED BY DIFFERENT METHODS

CuO/ZrO2 catalysts were prepared by impregnation,The support were dried by two different methods: Supercritical and in air.The catalyst prepared by supercritical drying exhibited higher activity for methanol synthesis from CO/2H2 than the catalyst dried in air,The reaction was selected to methanol for both catalysts.It was shown in XRD and TPR that the dispersion of copper on the supercritically dried support was higher than that of air dried support.The former possesses better pore structure and larger specific surface area than the latter does, which lead to a higher dispersion of copper on the supercritically dried support than on the air dried support.