Plasma-enhanced comparative hydrothermal and coprecipitation preparation of CuO/ZnO/Al2O3 nanocatalyst used in hydrogen production via methanol steam reforming
Plasma-enhanced comparative hydrothermal and coprecipitation preparation of CuO/ZnO/Al2O3 nanocatalyst used in hydrogen production via methanol steam reforming
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DOI：
10.1016/j.enconman.2017.03.069
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发表时间：
2017-06-15
影响因子：
10.4
通讯作者：
Haghighi, Mohammad
中科院分区：
文献类型：
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作者：
Bagherzadeh, Seyed Behnam;Haghighi, Mohammad
采用水热法和共沉淀法合成了CuO/ZnO/Al 2 O3纳米催化剂。然后将其暴露于1000 V的辉光放电等离子体中45 min。在甲醇水蒸气重整反应中考察了制备的纳米催化剂在甲醇转化为氢气中的性能。各种表征技术，如X射线衍射，场发射电子显微镜，粒度分布，EDX点映射，BET表面积和傅里叶变换红外光谱，以获得合成的纳米催化剂的物理化学性质。XRD衍射图表明，采用共沉淀法和辉光放电等离子体法制备的CuO（1 1 1）微晶片分散性更好。FESEM图像显示，采用低温等离子体辅助共沉淀法制备的CuO/ZnO/Al 2 O3样品具有最佳的表面形貌和粒度分布。EDX点图分析表明，CuO/ZnO/Al 2 O3样品中元素的分散最均匀。催化性能评价表明，等离子体辅助共沉淀法合成的CuO/ZnO/Al 2 O3样品在反应中甲醇转化率最高，CO生成量最低。对CuO/ZnO/Al 2 O3纳米催化剂性能的稳定性评价表明，该催化剂在甲醇水蒸气重整反应中，甲醇转化率和产物选择性基本保持不变。(C)2017爱思唯尔有限公司版权所有。
The CuO/ZnO/Al2O3 nanocatalyst was synthesized using hydrothermal and coprecipitation methods. Then they were exposed to glow discharge plasma for 45 min at 1000 V. The performance of prepared nanocatalysts in conversion of methanol to hydrogen was investigated in steam reforming of methanol reaction. Various characterization techniques such as X-ray diffraction, field emission electron microscopy, particle size distribution, EDX-dot mapping, BET surface area and Fourier transform infrared spectroscopy were used in order to obtain physicochemical properties of synthesized nanocatalysts. XRD diffraction patterns showed that applying coprecipitation method and also glow discharge plasma, led to more dispersion of CuO (1 1 1) crystallite plate. FESEM images displayed that using non-thermal plasma assisted coprecipitation synthesis method caused to best surficial morphology and particle size distribution in CuO/ZnO/Al2O3 sample. EDX-dot mapping analysis demonstrated that the CuO/ZnO/Al2O3 sample had the most uniform dispersion of elements. Evaluation of catalytic performance indicated that plasma assisted coprecipitation synthesized CuO/ZnO/Al2O3 sample had the highest conversion of methanol and the lowest CO generation among other samples in the reaction. Stability assessment of the performance of CuO/ZnO/Al2O3 nanocatalyst represented that conversion of methanol and products selectivity were approximately constant through long term use in steam reforming of methanol reaction. (C) 2017 Elsevier Ltd. All rights reserved.