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. (3rd May 2019)

• Record Type: Journal Article
• Authors: Khani, Yasin; Bahadoran, Farzad; Safari, Nasser; Soltanali, Saeed; Taheri, Sayyed Ali
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 23(2019)
• Page Start: 11824
• Page End: 11837
• Publication Date: 2019-05-03
• Subjects: Methanol reforming -- Spinel ZnxLaxAl1-xO4 support -- Monolithic reactor -- CuCatalyst -- Hydrogen production; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.03.031
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The effect of ceramic support on the performance of methanol reforming process catalysts was studied by synthesizing Cu/Zn1.11 La1.26 Al0.5 O4.27 and comparing it with optimized, conventional γAl2 O3 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/Zn1.11 La1.26 Al0.5 O4.27 catalyst is very highly efficient and active, has a lower reduction temperature and possess better pore size and pore volume compared with γ-Al2 O3 based catalysts. Comparison of Cu/γAl2 O3, Cu/La-γAl2 O3, Cu-Zn/La-γAl2 O3 and Cu-Zn/γAl2 O3 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 H2. Therefore, Cu-Zn/La-γAl2 O3 catalyst function better works uniformly at all temperatures. The conversion and selectivity to H2 of the new Cu/Zn1.11 La1.26 Al0.5 O4.27 catalyst (97% and 91% respectively) are greater than the alumina supported catalysts such as Cu-Zn/La-γAl2 O3 (90% and 73% respectively). The obtained results show that in this process, the designed Monolith/Zn1.11 La1.26 Al0.5 O4.27 structure has a remarkable impact on methanol conversion and carbon monoxide selectivity. Graphical abstract: Image 1 Highlights: Micro structures monolith was coupled with Spinel Znx Lax Al1-x O4 as support. Τhe Monolith/Cu-Znx Lax Al1-x O4 structure has a remarkable impact on MeOH conversion. The support evaluated for steam reforming of methanol with Cu catalyst. The coupled structure improved catalyst active area for methanol steam reforming. High conversion resulted for all catalyst structure (over 45%) at low temperature.