首页|Innovative construction of macroporous-mesoporous structured spherical alumina and its hydrothermal stability

Innovative construction of macroporous-mesoporous structured spherical alumina and its hydrothermal stability

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The pore structure of spherical alumina supports is closely related to the dispersion of catalytically active components and the diffusion of reactants.Maintaining excellent pore structure under strict reaction conditions is of utmost importance.In this work,spherical γ-Al2O3 support with a bimodal pore structure,composed of macropores and mesopores,was successfully synthesized using dodecane as the pore-forming agent through the oil-ammonia column-shaping method.The morphology and internal pore structure of the alumina were found to be influenced by the amount of surfactant added and ul-trasound treatment conditions.Notably,when concentration of surfactant was 4‰ and ultrasound voltage of 20 V was applied,the resulting γ-Al2O3-4‰-20 displayed a highly concentrated distribution of macropores with an average pore size of 100 nm,resulting in an impressive porosity of 69.21％.In contrast,the untreated sample of γ-Al2O3-0-0 only exhibited a mesoporous distribution with a porosity of 54.03％.Moreover,after being subjected to a hydrothermal treatment in a high temperature(600 ℃)and high humidity(water vapor)environment for 120 h,the y-Al2O3-4‰-20 sample maintained a high BET specific surface area of 170.9 m2 g-1 and mercury intrusion porosimetry specific surface area of 263.3 m2 g-1.

Spherical alumina supportsPore-forming agentOil-ammonia column shaping methodHydrothermal treatmentHydrothermal stability

Yufan Mo、Chunli Li、Huiyu Li、Wei Han、He Wen、Yinghong Han、Chunxia Che、Yongjun Feng

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State Key Laboratory of Chemical Resource Engineering,Beijing Engineering Center for Hierarchical Catalysts,College of Chemistry,Beijing University of Chemical Technology,Beijing,100029,China

Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou,730060,China

National Key R&D Program of ChinaLanzhou Petrochemical Research Center project,and Programs for Foreign Talent

2022YFA1503400G2021106012L

2024

10.1016/j.partic.2024.01.014

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2024.90(7)
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