Hydrogen production from steam reforming of methanol over Cu-based catalysts: The behavior of ZnxLaxAl1-xO4 and ZnO/La2O3/Al2O3 lined on cordierite monolith reactors
Hydrogen production from steam reforming of methanol over Cu-based catalysts: The behavior of ZnxLaxAl1-xO4 and ZnO/La2O3/Al2O3 lined on cordierite monolith reactors
复制标题
DOI：
10.1016/j.ijhydene.2019.03.031
复制
发表时间：
2019-05-03
影响因子：
7.2
通讯作者：
Taheri, Sayyed Ali
中科院分区：
文献类型：
--
作者：
Khani, Yasin;Bahadoran, Farzad;Taheri, Sayyed Ali
采用整体式反应器合成了Cu/Zn 1.11La 1.26Al 0.5O 4.27催化剂，并与优化后的传统γ-Al 2 O 3基催化剂进行了对比，研究了陶瓷载体对甲醇重整催化剂性能的影响。采用BET、FESEM、FTIR、XRD、TGA、TPR、TEM和XPS等分析手段对合成催化剂的物化性能进行了研究。结果表明，海绵状陶瓷载体Cu/Zn 1.11La 1.26Al 0.5O 4.27催化剂与γ-Al 2 O 3基催化剂相比，具有还原温度低、孔径和孔容大等优点，具有很高的催化活性和活性。Cu/γ-Al 2 O3、Cu/La-γ-Al 2 O3、Cu/Zn/La-γ-Al 2 O3和Cu-Zn/γ-Al 2 O3催化剂的比较表明，Zn的存在不希望地影响较高温度下的甲醇转化率，而积极地影响较低温度下的转化率。与Zn不同，La在较高温度下就转化率和对H-2的选择性而言更好地起作用。因此，Cu-Zn/La-gamma-Al 2 O3催化剂功能更好地在所有温度下均匀工作。新型Cu/Zn 1.11La 1.26Al 0.5O 4.27催化剂的H2-转化率和选择性（分别为97%和91%）高于氧化铝负载型催化剂如Cu-Zn/La-γ-Al 2 O 3（分别为90%和73%）。结果表明，在该反应过程中，所设计的Monolith/Zn1.11La1.26Al0.5O4.27结构对甲醇转化率和一氧化碳选择性有显著影响。(C)2019年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
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.