High activity in catalytic cracking of large molecules over micro-mesoporous silicoaluminophosphate with controlled morphology  

作　　者：QI Jian ZHAO TianBo XU Xin LI FengYan SUN GuiDa 

机构地区：[1]Institute for Chemical Physics,Beijing Institute of Technology,Beijing 100081,China [2]Department of Applied Chemistry,Beijing Institute of Petrochemical Technology,Beijing 102617,China

出　　处：《Science China Chemistry》2010年第11期2279-2284,共6页中国科学(化学英文版)

基　　金：supported by the National Basic Research Program of China (2003CB615802)

摘　　要：A novel micro-mesoporous silicoaluminophosphate(MUS-5) with controlled morphology has been first synthesized in a two-step route.The physical properties of the silicoaluminophosphate were characterized using XRD,SEM,TEM,nitrogen adsorption-desorption and NH3-TPD techniques.When the pH value of the solution system was varied in the range from 2.0 to 5.0,three different morphologies of silicoaluminophosphate including chain-like,flower-like and barrel-like morphology were obtained.Catalytic tests showed that the silicoaluminophosphate exhibited higher catalytic activity compared with the conventional microporous SAPO-5 under the same conditions for catalytic cracking of 1,3,5-triisopropylbenzene heavy aromatics.The remarkable catalytic reactivity was mainly attributed to the presence of the hierarchical porosity in the silicoaluminophosphate catalyst.A novel micro-mesoporous silicoaluminophosphate(MUS-5) with controlled morphology has been first synthesized in a two-step route.The physical properties of the silicoaluminophosphate were characterized using XRD,SEM,TEM,nitrogen adsorption-desorption and NH3-TPD techniques.When the pH value of the solution system was varied in the range from 2.0 to 5.0,three different morphologies of silicoaluminophosphate including chain-like,flower-like and barrel-like morphology were obtained.Catalytic tests showed that the silicoaluminophosphate exhibited higher catalytic activity compared with the conventional microporous SAPO-5 under the same conditions for catalytic cracking of 1,3,5-triisopropylbenzene heavy aromatics.The remarkable catalytic reactivity was mainly attributed to the presence of the hierarchical porosity in the silicoaluminophosphate catalyst.

关 键 词：micro-mesoporous SILICOALUMINOPHOSPHATE controlled morphology catalytic cracking large molecule 

分 类 号：TQ424.25[化学工程]