Superior catalytic performance of micro-mesoporous Beta-SBA-15 composite with a high indexed isomerization factor in hydroisomerization of n-heptane

TY - JOUR

T1 - Superior catalytic performance of micro-mesoporous Beta-SBA-15 composite with a high indexed isomerization factor in hydroisomerization of n-heptane

AU - Gao, Li

AU - Shi, Zhiyuan

AU - Etim, Ubong Jerome

AU - Wu, Pingping

AU - Xing, Wei

AU - Zhang, Yi

AU - Bai, Peng

AU - Yan, Zifeng

N1 - Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/9/15

Y1 - 2019/9/15

N2 - A composite material Beta-SBA-15 (BS)comprising zeolite Beta units and SBA-15-like mesoporous structure was hydrothermally synthesized and served as catalyst support for the hydroisomerization of n-heptane. Materials were characterized by a variety of techniques. Characterization results revealed that Beta-SBA-15 composite has a two-dimensional hexagonal mesoporous channel with a pore size of 6.4 nm and a high concentration of moderate-strength acid sites. Evaluation results showed that Pt/HBS exhibited a relatively high n-heptane conversion (75.57%)with a good selectivity to isoheptanes (90.04%), resulting in the highest isoheptanes yield (68.04%)among all samples. The micro-mesoporous composite structure with moderate surface acidity enhanced diffusion of large isomerized intermediates as well as inhibiting the occurrence of cracking side reactions, achieving a high isoheptanes yield. Experimental data demonstrates that the indexed isomerization factor (IIF)as a performance descriptor can accurately predict the isomerization performance of catalysts.

AB - A composite material Beta-SBA-15 (BS)comprising zeolite Beta units and SBA-15-like mesoporous structure was hydrothermally synthesized and served as catalyst support for the hydroisomerization of n-heptane. Materials were characterized by a variety of techniques. Characterization results revealed that Beta-SBA-15 composite has a two-dimensional hexagonal mesoporous channel with a pore size of 6.4 nm and a high concentration of moderate-strength acid sites. Evaluation results showed that Pt/HBS exhibited a relatively high n-heptane conversion (75.57%)with a good selectivity to isoheptanes (90.04%), resulting in the highest isoheptanes yield (68.04%)among all samples. The micro-mesoporous composite structure with moderate surface acidity enhanced diffusion of large isomerized intermediates as well as inhibiting the occurrence of cracking side reactions, achieving a high isoheptanes yield. Experimental data demonstrates that the indexed isomerization factor (IIF)as a performance descriptor can accurately predict the isomerization performance of catalysts.

KW - Beta-SBA-15

KW - Hydroisomerization

KW - Indexed isomerization factor

KW - Micro-mesoporous composites

KW - n-Heptane

UR - http://www.scopus.com/inward/record.url?scp=85065182169&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2019.04.156

DO - 10.1016/j.fuel.2019.04.156

M3 - 文章

AN - SCOPUS:85065182169

SN - 0016-2361

VL - 252

SP - 653

EP - 665

JO - Fuel

JF - Fuel

ER -