Microwave-assisted solvothermal synthesis of ZSM-22 zeolite with controllable crystal lengths--颗粒学报PARTICUOLOGY

Jamil, A. K., Muraza, O., & Al-Amer, A. M. (2016). Microwave-assisted solvothermal synthesis of ZSM-22 zeolite with controllable crystal lengths. Particuology, 24, 138-141. https://doi.org/10.1016/j.partic.2015.09.002

Microwave-assisted solvothermal synthesis of ZSM-22 zeolite with controllable crystal lengths

Anas K. Jamil, Oki Muraza ^*, Adnan M. Al-Amer

Chemical Engineering Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, PO Box 5040, Dhahran 32161, East Province, Saudi Arabia

10.1016/j.partic.2015.09.002

Volume 24, February 2016, Pages 138-141

Received 13 April 2015, Revised 24 August 2015, Accepted 9 September 2015, Available online 21 November 2015, Version of Record 21 January 2016.

E-mail: omuraza@kfupm.edu.sa

Highlights

• ZSM-22 (TON) zeolite was synthesized using microwave-assisted solvothermal method.

• Different co-solvents such as ethanol, propanol, glycol were adopted in ZSM-22.

• Co-solvent addition resulted in elongated ZSM-22 crystal.

• Addition of co-solvent stimulated the appearance of ZSM-5 zeolite as an impurity.

Abstract

ZSM-22 (TON) zeolite crystal morphology was successfully controlled using a microwave-assisted solvothermal fabrication method. Different co-solvents, including ethanol, 2-propanol, glycerol, and ethylene glycol, were also applied in the synthesis mixture. The effects of various parameters such as the aging time, the type and amount of co-solvent on the ZSM-22 crystal aspect ratio were investigated. When employing this microwave irradiation synthesis, a long aging time was crucial to obtain smaller and more uniform crystal sizes. The addition of co-solvent resulted in elongated ZSM-22 crystals, regardless of the actual co-solvent used, although ZSM-22 zeolite crystallinity was sensitive to the co-solvent type. In general, the use of a co-solvent stimulated the appearance of ZSM-5 zeolite as an impurity and the amount of this impurity was proportional to the concentration of co-solvent in the synthesis mixture.

Graphical abstract

Keywords

Crystal morphology; Nucleation; Solvent; Hydrothermal crystal growth; Crystal structure

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