TY - JOUR
T1 - Beta-MCM-41 micro-mesoporous catalysts in the hydroisomerization of n-heptane
T2 - Definition of an indexed isomerization factor as a performance descriptor
AU - Gao, Li
AU - Shi, Zhiyuan
AU - Etim, Ubong Jerome
AU - Wu, Pingping
AU - Han, Dezhi
AU - Xing, Wei
AU - Mintova, Svetlana
AU - Bai, Peng
AU - Yan, Zifeng
N1 - Publisher Copyright:
© 2018 Elsevier Inc.
PY - 2019/3/15
Y1 - 2019/3/15
N2 - Beta-MCM-41(BM) composites consisting of Beta zeolite grown on MCM-41 type mesoporous structure were prepared. The composite materials were used as a support for stabilization of Pt. The Pt containing catalysts (Pt/HBM) were applied in n-heptane hydroisomerization reaction. The Pt/HBM catalysts showed higher n-heptane conversion and higher selectivity to isoheptanes in comparison to pure Beta and MCM-41. The results were explained by the accelerated diffusion of isoheptanes in the Pt/HBM composites, and the high concentration of acid sites with a moderate strength in the composites, which reduced the cracking of reactants and products. Based on the experimental results, an indexed isomerization factor (IIF) was deduced, which is correlated with the physical properties of the supports. The results indicated that the isoheptane yield of the catalysts is strongly dependent on the support (IIF). The general IIF descriptor for predicting the isomerization performance of support materials can provide precise guidance for the design of new micro-mesoporous composites.
AB - Beta-MCM-41(BM) composites consisting of Beta zeolite grown on MCM-41 type mesoporous structure were prepared. The composite materials were used as a support for stabilization of Pt. The Pt containing catalysts (Pt/HBM) were applied in n-heptane hydroisomerization reaction. The Pt/HBM catalysts showed higher n-heptane conversion and higher selectivity to isoheptanes in comparison to pure Beta and MCM-41. The results were explained by the accelerated diffusion of isoheptanes in the Pt/HBM composites, and the high concentration of acid sites with a moderate strength in the composites, which reduced the cracking of reactants and products. Based on the experimental results, an indexed isomerization factor (IIF) was deduced, which is correlated with the physical properties of the supports. The results indicated that the isoheptane yield of the catalysts is strongly dependent on the support (IIF). The general IIF descriptor for predicting the isomerization performance of support materials can provide precise guidance for the design of new micro-mesoporous composites.
KW - Beta-MCMC-41
KW - Hydroisomerization
KW - Indexed isomerization factor
KW - Micro-mesoporous composites
KW - N-heptane
UR - http://www.scopus.com/inward/record.url?scp=85055283425&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2018.10.015
DO - 10.1016/j.micromeso.2018.10.015
M3 - 文章
AN - SCOPUS:85055283425
SN - 1387-1811
VL - 277
SP - 17
EP - 28
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
ER -