摘要
采用悬浮液涂层法在堇青石结构化基体表面涂覆γ-Al2O3制备结构化载体。研究了悬浮液性能对结构化载体涂层负载量、比表面积以及涂层表面形貌的影响,并通过BET、SEM、超声波振动等手段对制备的结构化载体进行了表征。结果表明,悬浮液固体颗粒尺寸越小,悬浮液的粘度越低,制备的结构化载体性能越稳定;悬浮液固含量为25%时,结构化载体涂层有较好的表面性能和抗震性,比表面积由0.0085 m2.g-1增加到20.80 m2.g-1。
Structured catalyst supports were prepared by coating γ-Al2 O3 onto the cordierite structured substrate using dipping γ-Al2O3/water suspension. The effects of the suspension performance on the coating loading, specific surface area,surface morphology of the washcoats were investigated. The structured catalyst support was characterized by BET, SEM and ultrasonic vibration. The results showed that the smaller the particle size of suspension, the lower the viscosity of suspension was, and the performance of the structured catalystsupport was more uniform. For the best suspension solid content of 25% ,the structured catalyst support wash- ocat had good surface property and aseismatic performance specially, its specific surface area increased from 0. 0085 m^2·g^-1 to 20.80 m^2 · g^-1.
出处
《化学与生物工程》
CAS
2010年第2期15-18,共4页
Chemistry & Bioengineering
基金
国家自然科学基金资助项目(20876119)
