Preparation, Characterization and Catalytic Behavior of 12-Molybdophosphoric Acid Encapsulated in the Supercage of Cs+-exchanged Y Zeolite
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Preparation, Characterization and Catalytic Behavior of 12-Molybdophosphoric Acid Encapsulated in the Supercage of Cs+-exchanged Y Zeolite
Preparation, Characterization and Catalytic Behavior of 12-Molybdophosphoric Acid Encapsulated in the Supercage of Cs+-exchanged Y Zeolite
中国化学工程学报(英文版)2009年17卷第1期 页码:58-63
Affiliations:
1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology,Nanjing,China,210009
2. School of Chemistry and Chemical Engineering, Southeast University,Nanjing,China,211189
Author bio:
Funds:
Supported by the National Natural Science Foundation of China (20476046);the “Qinglan” Project of Jiangsu Province for Young Researchers
魏瑞平, 郭麦平, 王军. Preparation, Characterization and Catalytic Behavior of 12-Molybdophosphoric Acid Encapsulated in the Supercage of Cs+-exchanged Y Zeolite[J]. 中国化学工程学报(英文版), 2009,17(1):58-63. DOI: 10.1016/S1004-9541(09)60033-1.
-exchanged Y Zeolite[J]. , 2009, 17(1): 58-63.
魏瑞平, 郭麦平, 王军. Preparation, Characterization and Catalytic Behavior of 12-Molybdophosphoric Acid Encapsulated in the Supercage of Cs+-exchanged Y Zeolite[J]. 中国化学工程学报(英文版), 2009,17(1):58-63. DOI: 10.1016/S1004-9541(09)60033-1.DOI:
In order to solve the serious leaching problem of supported heteropoly acid catalysts in polar reaction media
12-molybdophosphoric acid encapsulated in the supercage of Cs
+
-exchanged Y zeolite was prepared by the "ship in the bottle" synthesis.The influence of ion-e
xchange conditions and the synthesis parameters on the encapsulation of PMo
12
were investigated.The obtained solid sample was characterized by X-ray diffraction(XRD)
31
P magic angle spin nuclear magnetic resonance(MAS NMR) and Fourier Transform Infrared Spectroscopy(FT-IR)
and its catalytic activity in the esterification of acetic acid and
n
-butanol was tested.The ion-exchange time
concentration of aqueous Cs
+
solution
pH value
and amount of Mo added in the synthesis mixture were revealed to influence the encapsulation very remarkably.Under the optimal conditions
12-molybdophosphoric acid could be successfully encapsulated in the supercage of CsY zeolite
and the samples showed considerable catalytic activity and excellent reusability in the esterification reaction.
Abstract
In order to solve the serious leaching problem of supported heteropoly acid catalysts in polar reaction media
12-molybdophosphoric acid encapsulated in the supercage of Cs
+
-exchanged Y zeolite was prepared by the "ship in the bottle" synthesis.The influence of ion-exchange conditions and the synthesis parameters on the encapsulation of PMo
12
were investigated.The obtained solid sample was characterized by X-ray diffraction(XRD)
31
P magic angle spin nuclear magnetic resonance(MAS NMR) and Fourier Transform Infrared Spectroscopy(FT-IR)
and its catalytic activity in the esterification of acetic acid and
n
-butanol was tested.The ion-exchange time
concentration of aqueous Cs
+
solution
pH value
and amount of Mo added in the synthesis mixture were revealed to influence the encapsulation very remarkably.Under the optimal conditions
12-molybdophosphoric acid could be successfully encapsulated in the supercage of CsY zeolite
and the samples showed considerable catalytic activity and excellent reusability in the esterification reaction.
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