Cu-based spinel catalysts CuB2O4 (B = Fe, Mn, Cr, Ga, Al, Fe0.75Mn0.25) for steam reforming of dimethyl ether
Cu-based spinel catalysts CuB2O4 (B = Fe, Mn, Cr, Ga, Al, Fe0.75Mn0.25) for steam reforming of dimethyl ether
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DOI：
10.1016/j.apcata.2008.02.039
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发表时间：
2008-06-15
影响因子：
5.5
通讯作者：
Eguchi, Koichi
中科院分区：
文献类型：
--
作者：
Faungnawakij, Kajornsak;Shimoda, Naohiro;Eguchi, Koichi
采用溶胶-凝胶法制备了cu基尖晶石氧化物cu2o4 (B = Fe, Mn, Cr, Ca, Al, or Fe0.75Mn0.25)，并进行了固相反应。研究了尖晶石与γ - al2o3的机械混合对二甲醚蒸汽重整制氢的影响。采用程序升温还原、x射线衍射和x射线光电子能谱等技术研究了这些尖晶石氧化物的还原行为和晶体性质，以及Cu在尖晶石催化剂中的氧化态。铜基尖晶石催化剂的还原相由金属铜与金属氧化物（MnO （B= Mn）、Cr2O3 （B=Cr）和Al2O3 (B= Al)）或与尖晶石(CuGa2O4 （B= Ga）、Fe3O4 （B=Fe）和MnFe2O4 （B= Fe0.75Mn0.25）组成，对催化活性和耐久性有较大影响。B族金属氧化物的稳定性和铜种与B族金属氧化物的相互作用对重整性能有重要影响。(c) 2008 Elsevier B.V.版权所有
Cu-based spinel-oxides CuB2O4 (B = Fe, Mn, Cr, Ca, Al, or Fe0.75Mn0.25)were synthesized via a sol-gel method and subsequent solid-state reaction. The spinels mechanically mixed with gamma-Al2O3 were evaluated for production of hydrogen from dimethyl ether steam reforming (DME SR). The reduction behavior and crystal property of these spinel-oxides, and the Cu oxidation state in spinel catalysts were investigated by temperature-programmed reduction, X-ray diffraction, and X-ray photoelectron spectroscopy techniques. The reduced phases of the Cu-based spinel catalysts that strongly affected the catalytic activity and durability were composed of metallic copper with metal oxides (MnO (B = Mn), Cr2O3 (B=Cr), and Al2O3 (B = Al)) or with spinels (CuGa2O4 (B = Ga), Fe3O4 (B=Fe), and MnFe2O4 (B = Fe0.75Mn0.25). The stability of B metal oxides and the interaction between copper species and B metal oxides significantly contributed to the reforming performance. (c) 2008 Elsevier B.V. All rights reserved.