Citation: Shu Ren, Guojuan Liu, Xian Wu, Xinqing Chen, Minghong Wu, Gaofeng Zeng, Ziyu Liu, Yuhan Sun b. Enhanced MTO performance over acid treated hierarchical SAPO-34[J]. Chinese Journal of Catalysis, ;2017, 38(1): 123-130. doi: 10.1016/S1872-2067(16)62557-3 shu

Enhanced MTO performance over acid treated hierarchical SAPO-34

Shu Ren ^a,b, ,
Guojuan Liu ^b ,
Xian Wu ^a,c ,
Xinqing Chen ^b ,
Minghong Wu ^c ,
Gaofeng Zeng ^b ,
Ziyu Liu ^b ,
Yuhan Sun b ^b

a College of Science, Shanghai University, Shanghai 201900, China;
b CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;
c School of Environmental and Chemical Engineering, Shanghai University, Shanghai 201900, China

Received Date: 27 September 2016
Revised Date: 17 October 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21403279, 21507141, 21506243), and the Science and Technology Commission of Shanghai Municipality (14DZ1207602, 14DZ1203700).

Hierarchical SAPO-34 crystals were synthesized by a facile acid etching post-treatment. Butter-fly-shaped porous patterns on four side faces and hierarchical pores composed of micropores, mesopores and macropores were formed after a nitric acid or oxalic acid treatment. The catalytic performance of the hierarchical SAPO-34 for the methanol to olefins (MTO) process showed that the synergistic effect of the hierarchical pores and acid sites resulted in a longer catalyst lifetime (from 210 to 390 min for the acid treated SAPO-34) and higher selectivity to light olefins of 92%-94%. The ethylene selectivity can be adjusted between 37.4% and 51.5% by the pore size. No hierarchical SAPO-34 was obtained after a treatment with butanedioic acid, and with this sample, fast deactiva-tion was detected after 100 min.
- Acid treatment,
- Hierarchical pore,
- SAPO-34,
- Methanol to olefins,
- Single-run lifetime
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