Effect of Synthesized Conditions of Cu-K-OMS-2 on Toluene Oxidation Performance

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Chatkamol Kaewbuddee
Narong Chanlek
Kitirote Wantala

Abstract

The objective of this study was to optimize synthesis conditions for the Cu-K-OMS-2 hydrothermal process. The effects of ageing temperature, ageing time and amount of copper (Cu) dopant were considered via using the Box-Behnken design (BBD) method to characterize the conditions for gaseous toluene degradation. In the models studied, the independent variables were ageing temperature (55-145ºC), ageing time (6-18 h) and amount of Cu dopant (2-6% mole). The quadratic model fitted very well with the experimental data (15 runs), which showed a higher value of R2 (0.98) and adjusted R2 (0.95), confirming that the model can explain the results successfully. Ageing temperature was found to be the only significant variable for the Cu-K-OMS-2 transformation phase, with CuO and the bixbyite phase appearing as the highest ageing temperature condition. Furthermore, the effects of ageing temperature, ageing time and amount of Cu dopant on the Cu3+/Cu2+ mole ratio were also investigated. Ageing temperature and amount of Cu dopant displayed a significant effect on both toluene removal and the Cu3+/Cu2+ mole ratio. On the other hand, ageing time was not significant for both responses. The high Cu3+/Cu2+ mole ratio led to enhancement of toluene removal. The optimized conditions for Cu-K-OMS-2 synthesis were determined as 120ºC of ageing temperature, 6 h of ageing time and 6% by mole of Cu on K-OMS-2, which removed 80% of toluene at a reaction temperature of 180ºC.

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How to Cite
Kaewbuddee, C., Chanlek, N., & Wantala, K. (2019). Effect of Synthesized Conditions of Cu-K-OMS-2 on Toluene Oxidation Performance. Applied Environmental Research, 41(3), 83-95. https://doi.org/10.35762/AER.2019.41.3.7
Section
Original Research
Author Biographies

Chatkamol Kaewbuddee, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand

Chatkamol Kaewbuddee

Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University,

Khon Kaen 40002, Thailand

Email: k_chatkamol@kkumail.com

Narong Chanlek, Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand

Narong Chanlek

Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima 30000, Thailand

Email: narong@slri.or.th

Kitirote Wantala, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand

Kitirote Wantala *Corresponding author

Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University,

Khon Kaen 40002, Thailand

Email: kitirote@kku.ac.th

Tel.: +664 3462 240 Ext 45705; Fax: +664 3462 240

https://orcid.org/0000-0001-6768-1996

https://www.en.kku.ac.th/web/che/531-2/