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On the effect of mesoporosity of FAU Y zeolites in the liquid-phase catalysis
Zhang, Rongxin; Xu, Shaojun; Raja, Duaa; Khusni, Nor Binti; Liu, Jinmin; Zhang, Jiaoyu; Abdulridha, Samer; Xiang, Huan; Jiang, Songshan; Guan, Yanan; Jiao, Yilai; Fan, Xiaolei
2019-04-01
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
ISSN1387-1811
Volume278Pages:297-306
AbstractThe porosity and acidity of three commercial FAU Y zeolites (including the original HY-2.6 and dealuminated HY-15/-30 zeolites) were studied comprehensively using nitrogen (N-2) physisorption, and mercury (Hg) porosimetry, ammonia temperature-programmed desorption (NH3-TPD) and pyridine Fourier transform infrared (pyridine-IR) analyses. The combined N-2 physisorption and Hg porosimetry is a useful tool to evaluate the hierarchical mesoporosity in the dealuminated samples, revealing that HY-15 and HY-30 possess > 50% open mesoporosity in the mesopores range of 5-10 nm. The acidity of the dealuminated Y zeolites has been reduced significantly in comparison to that of the original HY-2.6, e.g. Bronsted acidity decreased by ca. 69 folds by dealuminating HY-2.6 to HY-30. Catalytic results of Fischer esterification of methanol with carboxylic acids and aldol condensation of benzaldehyde with 1-heptanal have evidenced that the critical role of mesoporosity of the dealuminated Y zeolites in liquid-phase reactions. For example, in the esterification of lauric acid with methanol, HY-15 and HY-30 with hierarchical mesopores showed better catalytic activity (Le. conversion of lauric acid: 7.9% and 24.5%, respectively) than HY-2.6 (4.0%). The analysis of the catalytic results along with the acidic property suggests that the acidity is less influential than the porosity of zeolite catalysts. Results from this study allow us to explain the origin of the high activity of zeolites with mesoporosity in the liquid-phase catalysis.
KeywordZeolite Y Mesoporosity Acidity Aldol condensation Fischer esterification
Indexed BySCI
Language英语
WOS IDWOS:000459841900036
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81235
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Rongxin,Xu, Shaojun,Raja, Duaa,et al. On the effect of mesoporosity of FAU Y zeolites in the liquid-phase catalysis[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2019,278:297-306.
APA Zhang, Rongxin.,Xu, Shaojun.,Raja, Duaa.,Khusni, Nor Binti.,Liu, Jinmin.,...&Fan, Xiaolei.(2019).On the effect of mesoporosity of FAU Y zeolites in the liquid-phase catalysis.MICROPOROUS AND MESOPOROUS MATERIALS,278,297-306.
MLA Zhang, Rongxin,et al."On the effect of mesoporosity of FAU Y zeolites in the liquid-phase catalysis".MICROPOROUS AND MESOPOROUS MATERIALS 278(2019):297-306.
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