CAJ | 학술논문

氧化铝作为常用工业催化剂载体，其水热稳定性对催化剂寿命起至关重要作用。采用N2吸附、扫描电镜、X射线衍射、傅里叶红外光谱和NH3-TPD等对拟薄水铝石经800℃（升温速率10℃·min-1）焙烧4 h得到的氧化铝及水热处理后的氧化铝结构进行表征，研究拟薄水铝石结构对γ-Al2 O3水热稳定性的影响。结果表明，拟薄水铝石前驱体结晶程度越好，焙烧所得γ-Al2 O3的表面羟基越少，酸性越弱，水热稳定性越好。
양화려작위상용공업최화제재체，기수열은정성대최화제수명기지관중요작용。채용N2흡부、소묘전경、X사선연사、부리협홍외광보화NH3-TPD등대의박수려석경800℃（승온속솔10℃·min-1）배소4 h득도적양화려급수열처리후적양화려결구진행표정，연구의박수려석결구대γ-Al2 O3수열은정성적영향。결과표명，의박수려석전구체결정정도월호，배소소득γ-Al2 O3적표면간기월소，산성월약，수열은정성월호。
Aluminum oxide has been widely used as the support for industrial catalysts,and its hydrothermal stability plays a critical role in the catalyst lifetime. The effect of pseudo-boehmite structure on hydrothermal stability ofγ-Al2 O3 obtained from pseudo-boehmite after calcination at 800℃( heating rate 10℃·min-1 ) for 4 h was investigated. The structure of alumina before and after hydrothermal treatment was characterized by N2 adsorption-desorption,SEM,XRD,FT-IR and NH3-TPD. The results showed that the hydrothermal stability of γ-Al2 O3 was determined by the crystallity of pseudo-boehmite. The well crystallized γ-Al2 O3 with fewer hydroxyl and weak acidity exhibited higher hydrothermal stability compared with poor crystal-lized one.