摘要
采用低温水热处理技术对-γAl2O3载体进行改性,通过XRD、SEM、BET及NH3-TPD等测试表征技术对改性后的氧化铝进行表征。研究结果表明,低温水热处理-γAl2O3时,-γAl2O3部分再水合生成湃铝石,焙烧后形成γ--ηAl2O3,此双结构氧化铝表面形态为均匀分散的球形细小颗粒,双结构氧化铝载体制备的催化剂表面酸性能与常规-γAl2O3制备的催化剂相比,强酸中心的酸强度减弱,弱酸中心的酸强度增强。
γ-Al2O3 carrier was modified by hydrothermal treatment and characterized by XRD, BET, SEM and NH3-TPD techniques. The results showed that 7-alumina transform to bayerite after hydrothermal treatment at lower temperature, while γ-η-alumina formed after calcination. Uniformly-dispersed fine spherical grains exist the surface of the doubly-structured alumina. Compared with untreat- ed γ-Al2O3, strength of the strong acidic sites declined while that of weak acidic sites increased.
出处
《工业催化》
CAS
2006年第11期56-59,共4页
Industrial Catalysis
基金
国家重点基础研究发展计划(973计划)资助项目(2004CB217805)
