Facile synthesis of al-pillared mesoporous montmorillonite assisted with concentrated Al₁₃ solution

Abstract

Al-pillared mesoporous montmorillonite was facilely synthesized from concentrated Al₁₃ solution obtained by vacuum concentrating-ultrasonic pillaring strategy. Concentrated Al₁₃ solution could reduce the process of pillare and increase pillaring efficiency. The absolute value of layer distance could be increased by 0.96 nm via concentrated Al13 solution pillare. ²⁷Al NMR indicates that Al Keggin ions of concentrated Al13 are arranged in a more regular way by vacuum concentrating method. The Al-pillared mesoporous montmorillonite from concentrated Al¹³ solution has bigger specific surface area and even pore size distribution which were characterized by X-ray diffraction(XRD) and nitrogen adsorption measurement. Furthermore the catalytic activity of Al-pillared montmorillonite loaded Ni and Mo catalysts was tested by the hydrodesulfurization of thiophene. The thiophene conversion reached 77.5%, which was higher than the corresponding value reported in the literature.

Keywords

Pillared montmorillonite / Mesoporous material / Vacuum concentrating-ultrasonic

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