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Microwave Synthesis and Characterizaion of a Series of SAPO-11 Serials Zeolites and Hydroisomerization of n-Hexadecane over Pt/SAPO-11

Author: GuoShouJie
Tutor: GaoJunBin
School: Beijing University of Chemical Technology
Course: Applied Chemistry
Keywords: APO-11 zeolite Microwave Radiation Synthesis Characterization Hydroisomerization
CLC: O643.36
Type: Master's thesis
Year: 2006
Downloads: 157
Quote: 0
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Abstract


APO-11 heteroatom zeolite cation exchange properties , tunable acidity and excellent thermal stability and hydrothermal stability , and thus have a widespread concern . Has been widespread concern in the adsorbents, catalysts , catalyst supports , as well as ion exchange , etc. on the basis of previous work , microwave crystallization synthesis of single heteroatom MeAPO- 11 and dual heteroatom MeSAPO- 11 zeolite by XRD , the NH 3 -TPD , TG- DTA , SEM , N 2 < / sub > adsorption - desorption and other means of synthetic samples were characterized , and finally through the high-pressure continuous microreactor device , load Pt SAPO-11 Molecular Sieve on the n-hexadecane hydroisomerization reaction performance . ( 1 ) for the first time successfully synthesized by microwave radiation a single heteroatom MeAPO- 11 and dual heteroatom MeSAPO -11 zeolite SEM results showed that the synthesis method by microwave radiation can be synthesized relatively hydrothermal synthesized SAPO-11 particle size smaller of the molecular sieve . In the process of SAPO-11 investigated the n (SiO 2 ) / n (Al 2 O 3 ), pH value , pressure , time and other factors that impact on the physical and chemical properties of the synthesized product , the results show that the appropriate synthesis conditions : pH = 6.5 , the crystallization pressure of 4.7x10 5 Pa, the crystallization time of 180min , when n ( the SiO 2 < / sub> ) / n ( Al 2 O synthesis of SAPO-11 3 ) = 1.9 , the largest amount of acid . ( 2) Due to the transition metal ion radius is much larger than the Si 4 atomic radius , making it into the AlPO 4 -11 zeolite skeleton than Si the 4 atoms much more difficult , so the transition metal is only in a little amount of synthesized the heteroatom MeAPO - 11 and MeSAPO -11 molecular sieve , and

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalyst
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