Acidity, oxophilicity and hydrogen sticking probability of supported metal catalysts for hydrodeoxygenation process

3rd International Conference on Chemical Engineering Sciences and Applications 2017

Lup, A. Ng K.^1 ; Abnisa, F.^1,2 ; Daud, W.M.A.W.^1 ; Aroua, M.K.^3

Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^1

Department of Chemical Engineering, Faculty of Engineering, University of Malikussaleh, Lhokseumawe

24351, Indonesia^2

School of Science and Technology, Sunway University, No.5 Jalan Universiti, Selangor Darul Ehsan

47500, Malaysia^3

关键词: High affinity;    Hydrodeoxygenation;    Metallic sites;    Oxygen removal;    Sticking probability;    Supported-metal catalysts;    Theoretical framework;    TPD spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/334/1/012074/pdf
DOI  :  10.1088/1757-899X/334/1/012074

来源: IOP

【 摘 要 】

Hydrodeoxygenation is an oxygen removal process that occurs in the presence of hydrogen and catalysts. This study has shown the importance of acidity, oxophilicity and hydrogen sticking probability of supported metal catalysts in having high hydrodeoxygenation activity and selectivity. These properties are required to ensure the catalyst has high affinity for C-O or C=O bonds and the capability for the adsorption and activation of H2and O-containing compounds. A theoretical framework of temperature programmed desorption technique was also discussed for the quantitative understanding of these properties. By using NH3-TPD, the nature and abundance of acid sites of catalyst can be determined. By using H2-TPD, the nature and abundance of metallic sites can also be determined. The desorption activation energy could also be determined based on the Redhead analysis of TPD spectra with different heating rates.