the State Key Development Program for Basic Research of China(2012CB215002);National Natural Science Foundation of China(21176255);National Natural Science Foundation of China(21276278);Project of China National Petroleum Corporation(2014A-2111)
Structural Features and Application of Micro-Microporous Composite Zeolites
Li-Yuan SUN,Ya-Fei ZHANG,Yan-Jun GONG.Structural Features and Application of Micro-Microporous Composite Zeolites[J].Acta Physico-Chimica Sinica,2016,32(5):1105-1122.
State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis of China National Petroleum Corporation, China University of Petroleum, Beijing 102249, P. R. China
Abstract:
Micro-microporous composite zeolites with binary (or more) structures not only possess the advantages of the two kinds of molecular sieves, but also tailor the pore structure and acid property of the composite samples. These changes induce the formation of special properties of the composites and further present special catalytic performance, which drives many research studies. Based on synthetic methods and micro-structural features, micro-microporous composites can mainly be divided into two types: intergrowth or co-existence composite zeolites. The former has a structural rearrangement that is produced by the stacking of distinct layers and leads to the generation of a new crystal structure. The latter is formed by staggered growth and has a compound interface when two or more zeolites appeared in the same gel system. Compared with the intergrowth zeolites, the co-existence zeolites do not possess the new and perfect crystal structure. This review summarizes the development of micro-microporous composites, focusing on their synthesis and structural characteristics as well as the application of intergrowth and co-existence composite zeolites in the field of catalytic reactions.
