Synthesis and characterization of hierarchically porous alumina with three-dimensional interconnected pore structure

YANG Wei-ya; LING Feng-xiang; ZHANG Hui-cheng; WANG Shao-jun; SHEN Zhi-qi

Volume 46 Issue 5

May 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(5): 558-563

YANG Wei-ya, LING Feng-xiang, ZHANG Hui-cheng, WANG Shao-jun, SHEN Zhi-qi. Synthesis and characterization of hierarchically porous alumina with three-dimensional interconnected pore structure[J]. Journal of Fuel Chemistry and Technology, 2018, 46(5): 558-563.

Citation:

YANG Wei-ya, LING Feng-xiang, ZHANG Hui-cheng, WANG Shao-jun, SHEN Zhi-qi. Synthesis and characterization of hierarchically porous alumina with three-dimensional interconnected pore structure[J]. Journal of Fuel Chemistry and Technology, 2018, 46(5): 558-563.

Citation:

YANG Wei-ya, LING Feng-xiang, ZHANG Hui-cheng, WANG Shao-jun, SHEN Zhi-qi. Synthesis and characterization of hierarchically porous alumina with three-dimensional interconnected pore structure[J]. Journal of Fuel Chemistry and Technology, 2018, 46(5): 558-563.

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Synthesis and characterization of hierarchically porous alumina with three-dimensional interconnected pore structure

Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC, Dalian 116045, China

Funds:

China Petroleum & Chemical Corporation, SINOPEC 116027

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Corresponding author: LING Feng-xiang, Tel: +86-411-39699893, E-mail: lingfengxiang.fshy@sinopec.com
Received Date: 2018-01-04
Rev Recd Date: 2018-03-27

Available Online: 2021-01-23

Publish Date: 2018-05-10

Abstract

Abstract

Hierarchically porous alumina with three-dimensional interconnected pore structure was prepared by phase separation method with alumina sol as the seed crystals; the alumina material was then characterized by SEM, XRD, N₂ sorption, mercury porosimetry and NMR. The results reveal that the ierarchically porous alumina is provided with macropores of 200-600 nm in gamma phase; it has a high surface area of 366 m²/g and narrow double pore size distributions at about 5 and 400 nm. As revealed by NMR, AlO₄, and AlO₆ are formed in the calcined alumina sample. It is then suggested that during the synthesis, PEO acted as a seed can inspire phase separation, generating the interconnected three-dimensional macropores, while the crystalline grain in the sol may induce the aluminum hydrates to form active AlOOH, which is then transformed to gamma crystalline phase by calcination even at mild temperature.
- 3D-interconnected pores,
- hierarchical pores,
- macroporous alumina,
- seed crystals,
- preparation and characterization

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References(17)

References

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