High-temperature steam reforming of methanol over ZnO–Al2O3 catalysts

Yang, Mei; Li, Shulian; Chen, Guangwen

doi:10.1016/j.apcatb.2010.10.010

Cited by 61 publications

(28 citation statements)

References 54 publications

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“…Thus, indicating MgO structural perturbation. There are also indications by Yang et al [47] that calcination temperature affects the catalyst activity. They prepared ZnO-Al 2 O 3 by co-precipitation but calcined samples of the precursor at 500°C and 800°C.…”

Section: Physico-chemical Analysismentioning

confidence: 92%

“…However, the contrary was reported by Jones et al [5], who carried out the calcination procedure at 300°C and 500°C and observed that the lower calcination temperature slightly improved catalyst activity and selectivity to butadiene. Noteworthy is that the reaction process and precursors used in the works of Jones et al [5] and Yang et al [47] are different. Perhaps, this is an influential factor.…”

Section: Physico-chemical Analysismentioning

confidence: 97%

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Fundamental Issues of Catalytic Conversion of Bio‐Ethanol into Butadiene

et al. 2014

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This paper reviews issues related to butadiene production via bio-ethanol conversion from the days of Lebedev until today. A catalogue of catalytic systems proposed till date were identified; the inevitable role of various dopants in enhancing catalytic activity, physico-chemical analysis of certain catalytic trends and prospects for the development of the old process by the implementation of process initiators and the use of new generation catalysts with higher performance and better tolerance to coking problems, and the impact of shale gas exploitation on the supply and demand of butadiene were also discussed.

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Section: Physico-chemical Analysismentioning

confidence: 92%

Section: Physico-chemical Analysismentioning

confidence: 97%

Fundamental Issues of Catalytic Conversion of Bio‐Ethanol into Butadiene

et al. 2014

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“…Abello et al [3,49] studied ethanol steam reforming with a Ni/Zn-Al catalyst prepared by a sol-gel method and found that the catalyst had high selectivity to H2 and CO2. In the methanol steam reforming reported by Yang et al [50], ZnO-Al2O3 exhibited high hydrogen yield with low CO concentration. Therefore, the addition of basic ZnO into Ni-based Al2O3 catalysts could be promising for the process of steam gasification of biomass.…”

Section: Introductionmentioning

confidence: 91%

Promoting hydrogen production and minimizing catalyst deactivation from the pyrolysis-catalytic steam reforming of biomass on nanosized NiZnAlOx catalysts

Dong

Ling

et al. 2017

Fuel

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Hydrogen production from the thermochemical conversion of biomass was carried out with nano-sized NiZnAlOx catalysts using a two-stage fixed bed reactor system. The gases derived from the pyrolysis of wood sawdust in the first stage were catalytically steam reformed in the second stage. The NiZnAlOx catalysts were synthesized by a co-precipitation method with different Ni molar fractions (5, 10, 15, 25 and 35%) and a constant Zn:Al molar ratio of 1:4. The catalysts were characterized by a wide range of techniques, including N2 adsorption, SEM, XRD, TEM and temperature-programmed oxidation (TPO) and reduction (TPR). Fine metal particles of size around 10-11 nm were obtained and the catalysts had high stability characteristics, which improved the dispersion of active centers during the reaction and promoted the performance of the catalysts. The yield of gas was increased from 49.3 to 74.8 wt.%, and the volumetric concentration of hydrogen was increased from 34.7 to 48.1 vol.%, when the amount of Ni loading was increased from 5 to 35%. Meanwhile, the CH4 fraction decreased from 10.2 to 0.2 vol.% and the C2-C4 fraction was reduced from 2.4 vol.% to 0.0 vol.%. During the reaction, the crystal size of all catalysts was successfully maintained at around 10-11 nm with lowered catalyst coke formation, (particularly for the 35NiZn4Al catalyst where negligible coke was found) and additionally no obvious catalyst sintering was detected. The efficient production of hydrogen from the thermochemical conversion of renewable biomass indicates that it is a promising sustainable route to generate hydrogen from biomass using the NiZnAl metal oxide catalyst prepared in this work via a two-stage reaction system.

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“…Therefore, there is a growing incentive to develop non-precious metal and non-copper catalysts with a particular emphasis on low cost and increasing catalytic activity and selectivity that can operate at high space velocity with high methanol conversion, high selectivity to H 2 and low CO selectivity. Recently, binary ZnO-Al 2 O 3 catalysts have been reported to exhibit good catalytic performance for steam reforming of methanol [20]. In an attempt to develop ZnAl catalyst promoted by various dopants, we have found the promotion effect of Ni addition into ZnAl system.…”

Section: Introductionmentioning

confidence: 90%