Citation: Weihua Yu, Pengpeng Wang, Chunhui Zhou, Hanbin Zhao, Dongshen Tong, Hao Zhang, Huimin Yang, Shengfu Ji, Hao Wang. Acid-activated and WO_x-loaded montmorillonite catalysts and their catalytic behaviors in glycerol dehydration[J]. Chinese Journal of Catalysis, ;2017, 38(6): 1087-1100. doi: 10.1016/S1872-2067(17)62813-4 shu

Acid-activated and WO_x-loaded montmorillonite catalysts and their catalytic behaviors in glycerol dehydration

Weihua Yu ^a,b, ,
Pengpeng Wang ^b ,
Chunhui Zhou ^b,c,d ,
Hanbin Zhao ^b ,
Dongshen Tong ^b ,
Hao Zhang ^b ,
Huimin Yang ^e ,
Shengfu Ji ^f ,
Hao Wang ^c

a. Zhijiang College, Zhejiang University of Technology, Hangzhou 310024, Zhejiang, China;
b. Research Group for Advanced Materials & Sustainable Catalysis (AMSC), Research Center for Clay Minerals, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China;
c. Centre for Future Materials, University of Southern Queensland, Toowoomba, Queensland 4350, Australia;
d. Engineering Research Center of Non-metallic Minerals of Zhejiang Province, Zhejiang Institute of Geology and Mineral Resource, Hangzhou 310007, Zhejiang, China;
e. Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, Zhejiang, China;
f. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received Date: 13 January 2017
Revised Date: 10 March 2017

Fund Project: The work was supported by the National Natural Science Foundation of China (21373185, 41672033, 21506188, 21404090), the Open Project Programs of Engineering Research Center of Non-metallic Minerals of Zhejiang Province (ZD2015k07), of State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology (GCTKF2014006), of Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province (2016), and of State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology (CRE-2016-C-303)

The use of H₂SO_4-, HCl_-, H₃PO_4-, and CH₃COOH-activated montmorillonite (Mt) and WO_x/H₃PO_4- activated Mt as catalysts for the gas-phase dehydration of glycerol was investigated. The WO_x/H₃PO_4-activated Mt catalysts were prepared by an impregnation method using H₃PO_4-activated Mt (Mt-P) as the support. The catalysts were characterized using powder X-ray diffraction, Fourier-transform infrared spectroscopy, N₂ adsorption-desorption, diffuse reflectance ultraviolet-visible spectroscopy, temperature-programmed desorption of NH₃, and thermogravimetric analysis. The acid activation of Mt and WO_x loaded on Mt-P affected the strength and number of acid sites arising from H⁺ exchange, the leaching of octahedral Al³⁺ cations from Mt octahedral sheets, and the types of WO_x (2.7 ≤ x ≤ 3) species (i.e., isolated WO₄/WO_6-containing clusters, two-dimensional [WO₆] polytungstates, or three-dimensional WO₃ crystals). The strong acid sites were weakened, and the weak and medium acid sites were strengthened when the W loading on Mt-P was 12 wt% (12%W/Mt-P). The 12%W/Mt-P catalyst showed the highest catalytic activity. It gave a glycerol conversion of 89.6% and an acrolein selectivity of 81.8% at 320 ℃. Coke deposition on the surface of the catalyst led to deactivation.
- Glycerol,
- Acrolein,
- Dehydration,
- WO_x,
- Acid-activated nanoclay,
- Catalyst
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Acid-activated and WOx-loaded montmorillonite catalysts and their catalytic behaviors in glycerol dehydration

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通讯作者: 陈斌, bchen63@163.com

Acid-activated and WO_x-loaded montmorillonite catalysts and their catalytic behaviors in glycerol dehydration