Iranian Association of Chemical Engineering (IAChE) Iranian Journal of Chemical Engineering (IJChE) 1735-5397 12 3 2015 07 01 Copper Catalysts Supported on CeMnO2 for CO Oxidation in Hydrogen-Rich Gas Streams 3 14 11249 EN N. Hoshyar Hydrogen and Fuel Cell Research Laboratory, Chemical Engineering Department, University of Kashan, Kashan, Iran A. Irankhah Irankhah Hydrogen and Fuel Cell Research Laboratory, Chemical Engineering Department, University of Kashan, Kashan, Iran M. Jafari Hydrogen and Fuel Cell Research Laboratory, Chemical Engineering Department, University of Kashan, Kashan, Iran Journal Article 2015 10 17 e"> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>The CeMnO</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>supports were prepared via co-precipitation method by ammonia as</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>precipitating agent. The CuO/CeO</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>and CuO/Ce</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>(1-x)</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>Mn</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>x</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>(x=0.1, 0.3 and 0.5)</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>catalysts were synthesized by wet impregnation method. The physicochemical</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>properties of the prepared CuO/Ce</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>(1-x)</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>Mn</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>x</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>catalysts were characterized by N</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>adsorption-desorption, powder X-ray diffraction (XRD) and programmed H</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>temperature reduction (H</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>-TPR). The effects of Cu and Mn loading were investigated</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>on the catalytic performance. The findings illustrated that the 7% CuO/Ce</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.9</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>Mn</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.1</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>catalyst shows high activity for CO-PrOx. The high activity of 7% CuO/Ce</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.9</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>Mn</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.1</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>catalyst was ascribed to high surface area of the support, synergetic effects of CuO</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>and CeO</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>and increases of the mobility of lattice oxygen in ceria by addition of</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>MnO</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>. The effects of presence of H</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O in the reaction feed stream, oxygen to CO ratio</em> <span style="font-family: Times New Roman,Italic; font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>(λ) and gas hourly space velocity (GHSV) on the catalytic activity of 7%</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>CuO/Ce</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.9</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>Mn</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.1</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>were evaluated. It was found that the best performance of 7%</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>CuO/Ce</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.9</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>Mn</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>0.1</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-family: Times New Roman,Italic; font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>catalyst was obtained at λ=2, GHSV=20000 h</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>-1 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>and in addition,</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>the presence of H</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2</em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>O had negative effects on the activity of the catalyst. In the long</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>term stability test, nearly 100% CO conversion was maintained for 50 h at 120°C</em> <span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>with 70-80% CO</em><span style="font-size: 6pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 9pt; color: #000000; font-style: normal; font-variant: normal;"><em>selectivity.</em></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" /></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> https://www.ijche.com/article_11249_a56fd138b4e913761cd5a28a8ad30174.pdf