01811nas a2200217   4500008004100000022001400041245008200055210006900137260011000206300001400316490000600330520101100336100001401347700002001361700001701381700001801398700001801416700002901434700001901463856011101482       2015                        eng d  a2044-475300aHydrogen production by the water-gas shift reaction using CuNi/Fe2O3 catalyst0 aHydrogen production by the watergas shift reaction using CuNiFe2  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a2752-27600 v53 a<p>Incorporation of both Cu and Ni together into the crystalline lattice of Fe2O3 results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction. CuNi/Fe2O3 exhibited the highest CO conversion with negligible CH4 selectivity at the extremely high GHSV of 101 000 h(-1) (X-CO = 85% at 400 degrees C). The high activity of CuNi/Fe2O3 catalyst is mainly due to the increase in the lattice strain and the decrease in the binding energy of lattice oxygen. In addition, X-ray photoelectron spectroscopy (XPS) results provide direct evidence for the formation of surface CuNi alloy, which plays a critical role in suppressing the methanation reaction. The detailed characterization by powder X-ray diffraction (XRD), XPS, BET, and H-2 temperature-programmed reduction (TPR) techniques was used to understand the role of dopants on host iron oxides in the enhancement of catalytic activity for HT-WGS reaction.</p>1 aJha, Ajay1 aJeong, Dae-Woon1 aShim, Jae-Oh1 aJang, Won-Jun1 aLee, Yeol-Lim1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/hydrogen-production-water-gas-shift-reaction-using-cunife2o3-catalyst-001786nas a2200193   4500008004100000022001400041245008700055210006900142260011000211300001400321490000600335520103100341100001401372700002001386700001801406700002901424700001901453856012001472       2015                        eng d  a2046-206900aMesoporous NiCu-CeO2 oxide catalysts for high-temperature water-gas shift reaction0 aMesoporous NiCuCeO2 oxide catalysts for hightemperature watergas  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV  a1430-14370 v53 a<p>Mesoporous NiCu-CeO2 oxide catalysts were synthesized by using the evaporation-induced self-assembly method applied to the high-temperature, water-gas shift reaction (HT-WGS) between 350 to 550 degrees C. Nickel and copper loadings on mesoporous ceria were tailored to achieve high activity and selectivity by suppressing methane formation in HT-WGS. Among the prepared catalysts, NiCu(1 : 4)-CeO2 exhibited the highest selectivity to CO2 and H-2 with 85% CO conversion at a very high GHSV of 83 665 h(-1). The higher activity of the catalysts was due to the mesoporous architecture, which provides more accessible active sites for the WGS reaction. Powder X-ray diffraction (XRD), small angle X-ray scattering (SAXS), N-2-adsorption/desorption isotherm, high-resolution transmission electron microscopy (HR-TEM), and H-2-temperature-programmed reduction (TPR) techniques were used to understand the role of mesoporosity and bimetallic composition of various NiCu-CeO2 oxides in enhancing catalytic activity for HT-WGS.</p>1 aJha, Ajay1 aJeong, Dae-Woon1 aJang, Won-Jun1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/mesoporous-nicu-ceo2-oxide-catalysts-high-temperature-water-gas-shift-reaction-001904nas a2200289   4500008004100000022001400041245012400055210006900179260007300248300001000321490000800331520090700339653000901246653001501255653001901270653002101289653002001310100001401330700002001344700001801364700001801382700001701400700002001417700002901437700001901466856012901485       2016                        eng d  a0926-860X00aChromium free high temperature water-gas shift catalyst for the production of hydrogen from waste derived synthesis gas0 aChromium free high temperature watergas shift catalyst for the p  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a21-310 v5223 a<p>A comparative study between monometallic (Me-CeO2, Me =Zn, Cu, Fe and Co) and Ni-doped bimetallic (Me-Ni-CeO2) catalysts has been performed in the high temperature water-gas shift (HT-WGS) reaction using waste derived synthesis gas. Experimental results revealed that Me-Ni-CeO2 exhibited higher catalytic performance than simple Me-CeO2 catalysts. Within the Me-Ni-CeO2 series, Co-Ni-CeO2 exhibited excellent and stable catalytic performance (CO conversion &gt; 90%) at a very high GHSV of 143,000 h(-1). The existence of high" concentration of Ce3+ ions and oxygen vacancies on the catalyst surface were responsible for the increased WGS activity of Co-Ni-CeO2. In addition, Co-Ni-CeO2 maintains a stable performance for 50 h. However, commercial Fe2O3-Cr2O3 catalyst showed a steep decline from their initial CO conversion values 15-10% within 5 h. (C) 2016 Elsevier B.V. All rights reserved.</p>10aCeO210aCo-Ni-CeO210aLattice strain10aoxygen vacancies10aWater-gas shift1 aJha, Ajay1 aJeong, Dae-Woon1 aLee, Yeol-Lim1 aJang, Won-Jun1 aShim, Jae-Oh1 aJeon, Kyung-Won1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/chromium-free-high-temperature-water-gas-shift-catalyst-production-hydrogen-waste-derived01902nas a2200301   4500008004100000022001400041245013000055210006900185260000900254300001000263490000800273520089400281653002501175653001201200653003701212653002501249653001401274653003201288100001801320700001401338700001801352700001701370700002901387700002001416700002001436700001901456856012501475       2018                        eng d  a0926-860X00aEffect of alkali and alkaline earth metal on Co/CeO2 catalyst for the water gas shift reaction of waste derived synthesis gas0 aEffect of alkali and alkaline earth metal on CoCeO2 catalyst for  cFEB   a63-700 v5513 a<p>We prepared a series of alkali (Na and K) and alkaline earth metal (Ca and Ba) promoted Co/CeO2 catalysts to investigate the effect of the promoter on the catalytic performance of the catalyst in the high-temperature water gas shift (WGS) reaction of waste derived synthesis gas. Interestingly, alkali metal promoted catalysts deactivated rapidly compared to alkaline earth metal promoted catalysts. Alkaline earth metal promoted catalysts showed relatively higher stability (&gt;50 h) even at a very high gas hourly space velocity of 143,000 h(-1). X-ray diffraction (XRD) and transmission electron microscopy (TEM) results reveal that the higher stability of the alkaline earth metal promoted catalysts was due to the strong resistance to sintering, showing a relatively small crystallite size of metallic cobalt compared to the alkali metal promoted catalysts after WGS reaction.</p>10aAlkaline earth metal10aCo/CeO210aHigh temperature water-gas shift10aSintering resistance10astability10aWaste derived synthesis gas1 aLee, Yeol-Lim1 aJha, Ajay1 aJang, Won-Jun1 aShim, Jae-Oh1 aRode, Chandrashekhar, V.1 aJeon, Byong-Hun1 aBae, Jong, Wook1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/effect-alkali-and-alkaline-earth-metal-coceo2-catalyst-water-gas-shift-reaction-waste01636nas a2200265   4500008004100000022001300041245010800054210006900162260000800231300001000239490000800249520077800257100001701035700001701052700001801069700002001087700001701107700001801124700001501142700002001157700002001177700002901197700001901226856012501245       2018                        eng d  a0920586100aEffect of titration time on the catalytic performance of Cu/CeO2 catalysts for water-gas shift reaction0 aEffect of titration time on the catalytic performance of CuCeO2   cJUL  a83-880 v3093 aWe herein report the preparation of ceria (CeO2) via a simple precipitation method for use as a catalyst support in the water-gas shift (WGS) reaction. More specifically, we optimized the titration time required to obtain highly active CeO2-supported catalysts for the WGS reaction. As such, Cu was employed as the active metal coupled with the CeO2 support. Notably, the CeO2-0 supported Cu catalyst (where the precipitant was immediately injected into a cerium nitrate solution) exhibited the highest CO conversion at a gas hourly space velocity of 36,050 h(-1). This high catalytic activity of the Cu/CeO2-0 catalyst was mainly due to its high Brunauer-Emmett-Teller (BET) surface area, enhanced Cu dispersion, high number of oxygen vacancies, and enhanced reducibility.1 aNa, Hyun-Suk1 aShim, Jae-Oh1 aJang, Won-Jun1 aJeon, Kyung-Won1 aKim, Hak-Min1 aLee, Yeol-Lim1 aLee, Da-We1 aYoo, Seong-Yeun1 aBae, Jong, Wook1 aRode, Chandrashekhar, V.1 aRoh, Hyun-Seog  uhttps://library.ncl.res.in/content/effect-titration-time-catalytic-performance-cuceo2-catalysts-water-gas-shift-reaction