globalchange  > 气候减缓与适应
DOI: 10.1016/j.jcou.2017.09.010
Scopus记录号: 2-s2.0-85035747863
论文题名:
Syngas production in chemical looping reforming process over ZrO2 promoted Mn-based catalyst
作者: Alirezaei I.; Hafizi A.; Rahimpour M.R.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 23
起始页码: 105
结束页码: 116
语种: 英语
英文关键词: Chemical looping ; CO2 utilization ; Hydrogen production ; Lattice oxygen ; ZrO2 promoter
Scopus关键词: Alumina ; Carbon dioxide ; Coke ; Deposition ; Electron microscopy ; Energy dispersive spectroscopy ; Field emission microscopes ; High resolution transmission electron microscopy ; Hydrogen production ; Manganese ; Manganese compounds ; Methane ; Oxygen ; Reforming reactions ; Scanning electron microscopy ; Synthesis gas ; Transmission electron microscopy ; X ray powder diffraction ; X ray spectroscopy ; Chemical looping ; Chemical-looping reforming ; Energy dispersive X ray spectroscopy ; Field emission scanning electron microscopy ; Lattice oxygen ; Reaction temperature ; Reduction temperatures ; ZrO2 promoter ; Zirconium compounds
英文摘要: Chemical looping reforming (CLR) of methane is a familiar process for the production syngas or hydrogen, which could be applied as one of the most important energy sources. In this process, reforming of methane takes place in the fuel reactor in contact with lattice oxygen of oxygen carriers (OCs), while the reduced OCs are re-oxidized in the air reactor. In this study, two different alumina supports are promoted using zirconium oxide to improve Mn-based oxygen carriers. Different synthesized oxygen carriers were evaluated in CO2-modified chemical looping reforming process at different conditions such as reaction temperature (500–750 °C), CH4/CO2 ratio (0.5–3), alumina support base, ZrO2 position and manganese loading weight percentage (10–30). The presence of ZrO2 in the support structure significantly inhibited the deposition of coke on the surface of oxygen carrier. The characterization and process results revealed the noteworthy effect of Zr incorporation to the structure of alumina support. The redox results revealed that 20Mn/20Zr-Al oxygen carrier exhibited the highest activity even at low reduction temperatures. This oxygen carrier exposed the highest activity and stability with lowest coke deposition during 16 redox cycles at 650 °C. The methane and CO2 conversion, H2 yield and H2/CO molar ratio of about 99.0%, 96.6%, 65.2% and 2.55 were achieved at 650 °C using the optimized oxygen carrier. The synthesized samples were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and N2 adsorption–desorption (BET) techniques. © 2017
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111992
Appears in Collections:气候减缓与适应

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作者单位: Department of Chemical Engineering, Shiraz University, Shiraz, 71345, Iran

Recommended Citation:
Alirezaei I.,Hafizi A.,Rahimpour M.R.. Syngas production in chemical looping reforming process over ZrO2 promoted Mn-based catalyst[J]. Journal of CO2 Utilization,2018-01-01,23
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