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首页> 外文期刊>International journal of hydrogen energy >Hydrogen production from steam reforming of methanol over Cu-based catalysts: The behavior of Zn_xLa_xAl_(1-x)O_4 and ZnO/La_2O_3/Al_2O_3 lined on cordierite monolith reactors
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Hydrogen production from steam reforming of methanol over Cu-based catalysts: The behavior of Zn_xLa_xAl_(1-x)O_4 and ZnO/La_2O_3/Al_2O_3 lined on cordierite monolith reactors

机译：铜基催化剂上甲醇蒸汽重整制氢：堇青石整体式反应器内衬的Zn_xLa_xAl_（1-x）O_4和ZnO / La_2O_3 / Al_2O_3的行为

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The effect of ceramic support on the performance of methanol reforming process catalysts was studied by synthesizing Cu/Zn1.11La1.26Al0.5O4.27 and comparing it with optimized, conventional gamma Al2O3 based catalyst in a monolithic reactor. The physicochemical properties of the synthetic catalysts were studied using BET, FESEM, FTIR, XRD, TGA, TPR, TEM and XPS analyses for better evaluation of their catalytic performance. The results showed that the sponge like ceramic support Cu/Zn1.11La1.26Al0.5O4.27 catalyst is very highly efficient and active, has a lower reduction temperature and possess better pore size and pore volume compared with gamma-Al2O3 based catalysts. Comparison of Cu/gamma Al2O3, Cu/La-gamma Al2O3, Cu/Zn/La-gamma Al2O3 and Cu-Zn/gamma-Al2O3 catalysts shows that the presence of Zn undesirably affects methanol conversion at higher temperatures while positively affecting the conversion at lower temperatures. Unlike Zn, La functions better at higher temperatures with respect to conversion and selectivity to H-2. Therefore, Cu-Zn/La-gamma-Al2O3 catalyst function better works uniformly at all temperatures. The conversion and selectivity to H-2 of the new Cu/Zn1.11La1.26Al0.5O4.27 catalyst (97% and 91% respectively) are greater than the alumina supported catalysts such as Cu-Zn/La-gamma-Al2O3 (90% and 73% respectively). The obtained results show that in this process, the designed Monolith/Zn1.11La1.26Al0.5O4.27 structure has a remarkable impact on methanol conversion and carbon monoxide selectivity. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
机译：通过合成Cu / Zn1.11La1.26Al0.5O4.27并将其与整体反应器中经过优化的常规基于γAl2O3的催化剂进行比较，研究了陶瓷载体对甲醇重整工艺催化剂性能的影响。使用BET，FESEM，FTIR，XRD，TGA，TPR，TEM和XPS分析研究了合成催化剂的理化性质，以更好地评估其催化性能。结果表明，与基于γ-Al2O3的催化剂相比，海绵状陶瓷载体Cu / Zn1.11La1.26Al0.5O4.27催化剂具有很高的效率和活性，还原温度较低，并且具有更好的孔径和孔体积。 Cu /γAl2O3，Cu /La-γAl2O3，Cu / Zn /La-γAl2O3和Cu-Zn /γ-Al2O3催化剂的比较表明，Zn的存在不利地影响了较高温度下的甲醇转化率，同时又积极地影响了较低的温度。与Zn不同，La在较高的温度下对H-2的转化率和选择性表现更好。因此，Cu-Zn /La-γ-Al2O3催化剂功能在所有温度下均能更好地均匀工作。新型Cu / Zn1.11La1.26Al0.5O4.27催化剂的转化率和对H-2的选择性（分别为97％和91％）大于氧化铝负载的催化剂，例如Cu-Zn /La-γ-Al2O3（分别为90％和73％）。所得结果表明，在此过程中，设计的Monolith / Zn1.11La1.26Al0.5O4.27结构对甲醇转化率和一氧化碳选择性具有显着影响。 （C）2019氢能出版物有限公司。由Elsevier Ltd.出版。保留所有权利。

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