Synthesis of mesoporous SAPO-34 zeolite from mesoporous silica materials for methanol to light olefins.
Mesoporous SAPO-34 zeolites were synthesized by using as-prepared mesoporous silica material as both silica source and mesopore tailor. The mesoporous SAPO-34 zeolite materials thus obtained are characterized by a series of different techniques, including poweder X-ray diffraction pattern, nitrogen physisorption analysis, scanning electron micrograph, temperature programmed desorption of ammonia, and inductively coupled plasma atomic emission spectrometry. The resultant mesoporous SAPO-34 crystals exhibit sphere-like particle with zeolite layer units. The mesopore size distribution and particle size can be changed by amounts of silica source and water. The methanol-to-olefins (MTO) reactions using these mesoporous SAPO-34 zeolites are carried out with a fixed-bed reactor. Catalytic tests exhibit that the mesoporous SAPO-34 zeolite materials show high catalytic activity compared with the conventional SAPO-34 for MTO reaction. The better catalytic activity and longer life time of the mesoporous SAPO-34 catalysts in MTO are mainly due to the existence of the mesoporosity of SAPO-34 with small particle size.
Research Center for Green Catalysis, Korea Research Institute of Chemical Technology, 141, Gajeong-ro, Yuseong-gu, Daejeon 305-600, South Korea.
Eun A
EA
Kang
Tae-Wan
TW
Kim
Ho-Jeong
HJ
Chae
Min
M
Kim
Kwang-Eun
KE
Jeong
Joo-Wan
JW
Kim
Chul-Ung
CU
Kim
Soon-Yong
SY
Jeong
D000475:Alkenes / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D000432:Methanol / Q000737:chemistry*; D008968:Molecular Conformation; D008970:Molecular Weight; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D017641:Zeolites / Q000138:chemical synthesis*
D000475:Alkenes; D046911:Macromolecular Substances; D017641:Zeolites; D012822:Silicon Dioxide; D000432:Methanol