热分解法制备负载型固体碱催化剂—K_2O/γ-Al_2O_3  

Synthesis of Supported Solid Base Catalyst-K_2O/γ-Al_2O_3 by Thermal Decomposition Method

作　　者：王辉宪 李大塘[1] 欧阳振中[1] 

机构地区：[1]湘潭师范学院化学系

出　　处：《化学世界》2002年第12期623-624,649,共3页Chemical World

基　　金：湖南省教育厅科研资助项目 ( 0 0 C2 42 );湖南省自然科学基金资助项目 ( 98JJY2 0 5 7)

摘　　要：用浸渍法制备 KNO3 /Al2 O3 样品。所得样品于 973 K下焙烧并抽空 2 h便制得负载型固体碱 K2 O/γ- Al2 O3 。拉曼光谱显示 973 K抽空的样品 KNO3 已完全分解成 K2 O。而 γ- Al2 O3 载体的存在可增强 KNO3 的分解 ,表明了 KNO3 与 Al2 O3The KNO_3/γ-Al_2O_3 sample (loading capacity: 6.3 mmol/g) was prepared by an incipient wetness impregnation method. The supported solid base K_2O/γ-Al_2O_3 was obtained from the KNO_3/γ-Al_2O_3 sample upon evacuation at 973 K. Raman spectroscopic studies of NO -__ x indicated that the potassium nitrate was completely decomposed into potassium oxide when evacuating at 973 K. The existence of γ-Al_2O_3 support apparently promotes the decomposition of potassium nitrate, indicating that the interaction between KNO_3 and Al_2O_3 is rather strong.

关 键 词：负载型固体碱催化剂 K2O/γ-Al2O3 热分解法 热重-差热分析 拉曼光谱 相互作用 浸渍法 氧化钾 氧化铝 

分 类 号：TQ426.81[化学工程] O64[理学—物理化学]