title: Relationship between Surface Chemistry and Catalytic Performance of Mesoporous γ-Al2O3Supported VOXCatalyst in Catalytic Dehydrogenation of Propane.
abstract: Mesoporous γ-Al2O3was synthesized via a cation-anion double hydrolysis approach (CADH). The synthesized mesoporous alumina displayed a relatively high surface area, a large pore volume and a narrow pore size distribution. By applying the mesoporous alumina as a support, supported vanadium catalysts were prepared and evaluated in the dehydrogenation of propane, exhibiting a superior catalytic performance over that supported on a commercial alumina. Materials were characterized with a variety of techniques such as X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy,51V magnetic angle spinning nuclear magnetic resonance, Raman spectroscopy, Fourier transformed infrared spectroscopy of pyridine adsorption and thermogravimetric-differential thermal analysis. The correlated structure-performance relationship of catalysts reveals that a higher crystallization temperature endows mesoporous alumina materials with more surface acid sites, favoring the formation of polymerized VOXspecies, which are more active than isolated ones in the propane dehydrogenation, resulting in a better catalytic performance. The established relationship between surface chemistry and catalytic performance of supported VOXcatalysts suggests that a superior vanadium catalyst for propane dehydrogenation could be achieved by rationally enriching the concentration of polymeric VOXspecies on the catalyst, which can be realized by tuning the surface acidity of alumina support.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Bai
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Li
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Yupeng
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Petrochina Petrochemical Research Institute , Beijing 102206, China.
authors.forename: Zhanquan
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: School of Chemical & Biomedical Engineering, Nanyang Technological University (NTU) , 62 Nanyang Drive, 637459 Singapore.
authors.forename: Ziyi
authors.initials: Z
authors.lastname: Zhong
authors.affiliation: School of Science, China University of Petroleum , Qingdao 266580, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xing
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Pingping
authors.initials: P
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Xinmei
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Yan
keywords: mesoporous γ-Al2O3; polymerized VOX species; propane dehydrogenation; surface acidity; vanadium-based catalyst