Formaldehyde production via partial oxidation of methanol over oxides of Cr, Mo and W supported on ceria-zirconia

International Conference on Process Engineering and Advanced Materials 2018

Inokawa, H.^1 ; Zaman, S.F.^2 ; Driss, H.^2 ; Daous, M.^2 ; Al-Zahrani, A.^2 ; Miyaoka, H.^3 ; Ichikawa, T.^4 ; Kojima, Y.^3 ; Petrov, L.A.^2

Department of Nanoscience, Faculty of Engineering, Sojo University, 4-22-l Ikeda, Nishi-ku, Kumamoto

860-0082, Japan^1

King Abdulaziz University, P.O.Box 80204, Jeddah

21589, Saudi Arabia^2

Advanced Materials Division, N-BARD, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima

739-8530, Japan^3

Graduate School of Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima

739-8530, Japan^4

关键词: Ceria-zirconia;    Formaldehyde production;    H2 production;    Incipientwetness impregnation;    Methanol conversion;    Mixed oxide;    Partial oxidation of methanol;    Tungsten (w);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/458/1/012018/pdf
DOI  :  10.1088/1757-899X/458/1/012018

来源: IOP

【 摘 要 】

Oxides of chromium (Cr), molybdenum (Mo), or tungsten (W) were supported on mixed oxides of cerium and zirconium (CeO2-ZrO2) by an incipient wetness impregnation process, and used to investigate their activities for partial oxidation of methanol. High Resolusion Transmission Electron Microscope (HR-TEM) revealed that nanoparticles of Cr2O3, MoO3 or WO3 were formed on the CeO2-ZrO2 support. The particle sizes of Cr2O3, MoO3 and WO3 were 2-4, 3-6 and 4-5 nm, respectively. As a result of partial oxidation of methanol at 275 - 450 °C, formaldehyde (CH2O) was obtained as the major product over all these catalysts. Cr2O3 supported on CeO2-ZrO2 produced both CO and CO2 along with H2 production, while MoO3 and WO3 on CeO2-ZrO2 support generated only CO as a by-product. It was found that MoO3 supported on CeO2-ZrO2 showed the highest methanol conversion and CH2O yield among these three catalysts.