NDLI: C$_{2}$H$_{6}$/CO$_{2}$ oxidative dehydrogenation (ODH) reaction on nanostructured CrAPSO-34 catalyst: One-pot hydrothermal vs. conventional hydrothermal/impregnation catalyst synthesis

Content Provider	Springer Nature Link
Author	Rahmani, Farhad Haghighi, Mohammad
Copyright Year	2016
Abstract	A series of Cr incorporated SAPO-34 catalysts varying in Cr content and a Cr supported SAPO-34 catalyst were prepared by one-pot hydrothermal and incipient-wetness impregnation methods, respectively. The synthesized materials were characterized by XRD, FESEM, TEM, BET, EDX dot mapping, TPD-NH$_{3}$ and FTIR, and tested in ethane dehydrogenation with CO$_{2}$ reaction. The incorporation of Cr$^{3+}$ into the SAPO-34 framework and impregnation of Cr species were proved by TEM technique. With increase in the incorporated Cr content, smaller cubic crystals and amorphous particles were obtained. However, the extra-framework species probably appeared. Chromium impregnation led to micropore blockage and surface coverage partly, resulting in morphology change somewhat, significant decrease of surface area and acidity as evidenced by FESEM, TEM, BET and TPD-NH$_{3}$ analysis. However, one-pot synthesis not only preserved the structure of SAPO-34 but also allowed higher surface area, more effective surface acidity and better chromium dispersion to be achieved, features that account for superior catalytic performance and stability of directly synthesized Cr rich catalyst. The Cr incorporated SAPO-34 catalyst containing rich amount of Cr exhibited the best catalytic activity, showing 38% ethylene yield at 700 °C even after 5 h on-stream operation.
Starting Page	2555
Ending Page	2566
Page Count	12
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	33
Issue Number	9
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2016-07-18
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CrAPSO-34 One-pot Hydrothermal C$_{2}$H$_{6}$/CO$_{2}$ Oxidative Dehydrogenation Ethane Ethylene Industrial Chemistry/Chemical Engineering Catalysis Materials Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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