TY - JOUR
T1 - Catalytically active and hierarchically porous SAPO-11 zeolite synthesized in the presence of polyhexamethylene biguanidine
AU - Liu, Yan
AU - Qu, Wei
AU - Chang, Weiwei
AU - Pan, Shuxiang
AU - Tian, Zhijian
AU - Meng, Xiangju
AU - Rigutto, Marcello
AU - Made, Alexander van der
AU - Zhao, Lan
AU - Zheng, Xiaoming
AU - Xiao, Feng Shou
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the Natural National Science Foundation of China (21273197 and U1162201), National High-Tech Research & Development Program of China (2013AA065301), and Fundamental Research Funds for the Central Universities (2013XZZX001).
PY - 2014/3
Y1 - 2014/3
N2 - Hierarchically porous SAPO-11 zeolite (H-SAPO-11) is rationally synthesized from a starting silicoaluminophosphate gel in the presence of polyhexamethylene biguanidine as a mesoscale template. The sample is well characterized by XRD, N2 sorption, SEM, TEM, NMR, XPS, NH3-TPD, and TG techniques. The results show that the sample obtained has good crystallinity, hierarchical porosity (mesopores at ca. 10nm and macropores at ca. 50-200nm), high BET surface area (226m2/g), large pore volume (0.25cm3/g), and abundant medium and strong acidic sites (0.36mmol/g). After loading Pt (0.5wt.%) on H-SAPO-11 by using wet impregnation method, catalytic hydroisomerization tests of n-dodecane show that the hierarchical Pt/SAPO-11 zeolite exhibits high conversion of n-dodecane and enhanced selectivity for branched products as well as reduced selectivity for cracking products, compared with conventional Pt/SAPO-11 zeolite. This phenomenon is reasonably attributed to the presence of hierarchical porosity, which is favorable for access of reactants on catalytically active sites. The improvement in catalytic performance in long-chain paraffin hydroisomerization over Pt/SAPO-11-based catalyst is of great importance for its industrial applications in the future. © 2013 Elsevier Inc.
AB - Hierarchically porous SAPO-11 zeolite (H-SAPO-11) is rationally synthesized from a starting silicoaluminophosphate gel in the presence of polyhexamethylene biguanidine as a mesoscale template. The sample is well characterized by XRD, N2 sorption, SEM, TEM, NMR, XPS, NH3-TPD, and TG techniques. The results show that the sample obtained has good crystallinity, hierarchical porosity (mesopores at ca. 10nm and macropores at ca. 50-200nm), high BET surface area (226m2/g), large pore volume (0.25cm3/g), and abundant medium and strong acidic sites (0.36mmol/g). After loading Pt (0.5wt.%) on H-SAPO-11 by using wet impregnation method, catalytic hydroisomerization tests of n-dodecane show that the hierarchical Pt/SAPO-11 zeolite exhibits high conversion of n-dodecane and enhanced selectivity for branched products as well as reduced selectivity for cracking products, compared with conventional Pt/SAPO-11 zeolite. This phenomenon is reasonably attributed to the presence of hierarchical porosity, which is favorable for access of reactants on catalytically active sites. The improvement in catalytic performance in long-chain paraffin hydroisomerization over Pt/SAPO-11-based catalyst is of great importance for its industrial applications in the future. © 2013 Elsevier Inc.
UR - http://hdl.handle.net/10754/594124
UR - https://linkinghub.elsevier.com/retrieve/pii/S0021979713010564
UR - http://www.scopus.com/inward/record.url?scp=84891301774&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2013.11.065
DO - 10.1016/j.jcis.2013.11.065
M3 - Article
C2 - 24461835
SN - 0021-9797
VL - 418
SP - 193
EP - 199
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -