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首页> 外文期刊>Energy Conversion & Management >Fuel cell-grade hydrogen production from methanol over sonochemical coprecipitated copper based nanocatalyst: Influence of irradiation power and time on catalytic properties and performance
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Fuel cell-grade hydrogen production from methanol over sonochemical coprecipitated copper based nanocatalyst: Influence of irradiation power and time on catalytic properties and performance

机译：声化学共沉淀铜基纳米催化剂上甲醇制燃料电池级制氢：辐射功率和时间对催化性能和性能的影响

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摘要

A series of ceria promoted copper based nanocatalysts were synthesized by conventional and sonochemical co-precipitation methods at different irradiation power and time. Their performance was investigated for fuel cell-grade hydrogen production from methanol. The nanocatalysts were characterized by X-ray diffraction, field emission scanning microscope, Fourier transform infrared spectroscopy, specific surface area, and energy dispersive X-ray analyses. According to crystallography analysis by increasing irradiation power and time, the copper oxide crystallinity reduced and smaller and fully dispersed crystals produced. The nanocatalyst which sonicated at 90 W for 15 min had small spherical nanoparticles which their size range varied between 1 nm to 125 nm. The performance of nanocatalysts was examined through the methanol steam reforming process at 160-260 degrees C and atmospheric pressure with space velocity of 10,000 cm(3)/g(cat) h in a U-shape fixed bed reactor. Among all nanocatalysts, the sample synthesized by conventional co-precipitation showed the weakest activity. But the others which synthesized by the ultrasound assisted co-precipitation method represented higher activity in terms of methanol conversion as the irradiation power and time enhanced. Complete methanol conversion achieved at 200 degrees C for the nanocatalyst which sonicated at 90 W for 15 min during co-precipitation which is ideal for application in fuel cell vehicles. (C) 2016 Elsevier Ltd. All rights reserved.
机译：通过常规和声化学共沉淀方法在不同的照射功率和时间下合成了一系列氧化铈促进的铜基纳米催化剂。研究了它们在甲醇制燃料电池级制氢中的性能。通过X射线衍射，场发射扫描显微镜，傅立叶变换红外光谱，比表面积和能量分散X射线分析对纳米催化剂进行了表征。根据通过增加照射功率和时间的晶体学分析，氧化铜结晶度降低并且产生更小且完全分散的晶体。在90 W下超声处理15分钟的纳米催化剂具有小的球形纳米颗粒，其尺寸范围在1 nm至125 nm之间变化。在U型固定床反应器中，通过甲醇蒸汽重整工艺在160-260摄氏度和大气压下以10,000 cm（3）/ g（cat）h的空速对纳米催化剂的性能进行了研究。在所有纳米催化剂中，通过常规共沉淀合成的样品显示出最弱的活性。但是，通过超声辅助共沉淀法合成的其他化合物，随着辐照功率和时间的增加，在甲醇转化率方面表现出更高的活性。纳米催化剂在200摄氏度下完成了完全甲醇转化，在共沉淀过程中以90 W超声处理了15分钟，非常适合用于燃料电池汽车。 （C）2016 Elsevier Ltd.保留所有权利。

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