Shape-Selective Catalysis Determined by the Volume of a Zeolite Cavity and the Reaction Mechanism for Propylene Production by the Conversion of Butene Using a Proton-Exchanged Zeolite

2012 ◽  
Vol 116 (8) ◽  
pp. 5182-5196 ◽  
Author(s):  
Yasuyoshi Iwase ◽  
Yasuharu Sakamoto ◽  
Akinobu Shiga ◽  
Akimitsu Miyaji ◽  
Ken Motokura ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Zeolite Cavity ◽  
Shape Selective ◽  
Selective Catalysis ◽  
Propylene Production

scholarly journals Zeolite‐Assisted Lignin‐First Fractionation of Lignocellulose: Overcoming Lignin Recondensation through Shape‐Selective Catalysis

ChemSusChem ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4528-4536 ◽  
Author(s):  
Elena Subbotina ◽  
Alexandra Velty ◽  
Joseph S. M. Samec ◽  
Avelino Corma
Keyword(s):  
Shape Selective ◽  
Selective Catalysis

Shape selective catalysis by ZSM-35 zeolites

1991 ◽  
Vol 69 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Shashikala J. Rane ◽  
C.V.V. Satyanarayana ◽  
D.K. Chakrabarty
Keyword(s):  
Shape Selective ◽  
Selective Catalysis

scholarly journals Maximizing sinusoidal channels of HZSM-5 for high shape-selectivity to p-xylene

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Chuanfu Wang ◽  
Lei Zhang ◽  
Xin Huang ◽  
Yufei Zhu ◽  
Gang (Kevin) Li ◽  
...  
Keyword(s):  
High Activity ◽  
Chemical Industry ◽  
Chemical Separation ◽  
Shape Selectivity ◽  
Toluene Alkylation ◽  
Shape Selective ◽  
Toluene Methylation ◽  
Selective Catalysis ◽  
The Cost ◽  
Very High

Abstract The shape-selective catalysis enabled by zeolite micropore’s molecular-sized sieving is an efficient way to reduce the cost of chemical separation in the chemical industry. Although well studied since its discovery, HZSM-5′s shape-selective capability has never been fully exploited due to the co-existence of its different-sized straight channels and sinusoidal channels, which makes the shape-selective p-xylene production from toluene alkylation with the least m-xylene and o-xylene continue to be one of the few industrial challenges in the chemical industry. Rather than modifications which promote zeolite shape-selectivity at the cost of stability and reactivity loss, here inverse Al zoned HZSM-5 with sinusoidal channels predominantly opened to their external surfaces is constructed to maximize the shape-selectivity of HZSM-5 sinusoidal channels and reach > 99 % p-xylene selectivity, while keeping a very high activity and good stability ( > 220 h) in toluene methylation reactions. The strategy shows good prospects for shape-selective control of molecules with tiny differences in size.

Oxidative desulfurization of 4,6-dimethyldibenzothiophene over short titanate nanotubes: a non-classical shape selective catalysis

2019 ◽  
Vol 27 (2) ◽  
pp. 331-338
Author(s):  
Yue Yao ◽  
Miaoguo Zuo ◽  
Peipei Shao ◽  
Xiaoqiao Huang ◽  
Jianxin Li ◽  
...  
Keyword(s):  
Oxidative Desulfurization ◽  
Titanate Nanotubes ◽  
Shape Selective ◽  
Selective Catalysis ◽  
Classical Shape
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