The effect of the modification methods on the catalytic performance of activated carbon supported CuO-ZnO catalysts

Huamei Duan; Yunxia Yang; Jim Patel; Nick Burke; Yuchun Zhai; Paul A. Webley; Dengfu Chen; Mujun Long

The effect of the modification methods on the catalytic performance of activated carbon supported CuO-ZnO catalysts

Carbon Letters
Abbr : Carbon Lett.
2018, 25(1), pp.33-42
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Huamei Duan ¹, Yunxia Yang ², Jim Patel ², Nick Burke ², Yuchun Zhai ³, Paul A. Webley ⁴, Dengfu Chen ¹, Mujun Long ¹

¹Chongqing University
²CSIRO
³Northeastern University
⁴University of Melbourne

Accredited

ABSTRACT

Activated carbon (AC) was modified by ammonium persulphate or nitric acid, respectively. AC and the modified materials were used as catalyst supports. The oxygen groups were introduced in the supports during the modifications. All the supports were characterized by N2-physisorption, Raman, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and thermogravimetric analysis. Methanol synthesis catalysts were pre\-pared through wet impregnation of copper nitrate and zinc nitrate on the supports followed by thermal decomposition. These catalysts were measured by the means of N2-physisorption, X-ray diffraction, XPS, temperature programmed reduction and TEM tests. The catalytic performances of the prepared catalysts were compared with a commercial catalyst (CZA) in this work. The results showed that the methanol production rate of AC-CZ (23 mmol- CH3OH/(g-Cu·h)) was higher, on Cu loading basis, than that of CZA (9 mmol-CH3OH/ (g-Cu·h)). We also found that the modification methods produced strong metal-support in\-teractions leading to poor catalytic performance. AC without any modification can prompt the catalytic performance of the resulted catalyst.

KEYWORDS

CO2 hydrogenation, methanol, activated carbon, supported catalysts, clean energy

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