用溶胶-凝胶法制备了超细Fe-Al-P-O催化剂,并用DTA-TG,BET,TEM,XRD,TPR和IR等技术研究了催化剂的微观组成和结构及其晶格氧活性,探讨了催化剂的制备工艺,考察了溶胶-凝胶的形成机理、凝胶干燥及焙烧条件对催化剂微观组成和结构的影响规律. 结果表明,Fe-Al-P-O催化剂呈非晶态,是具有均匀分布的超细粒子(10 nm),其比表面积大(238 m2/g),晶格氧活性高. FePO4和AlPO4间隔分布在催化剂表面,形成Lewis碱位(P＝O,P-O-Fe)和Lewis酸位(Fe3+,Al3+).
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