The novel perovskite-type Ni-doped Sr0.92Y0.08TiO3 catalyst as a reforming biogas (CH4+ CO2) for H2 production
| Autor: | Ghun Sik Kim, Jonghee Han, Suk Woo Nam, Hyung Chul Ham, Joo Hyeng Oh, Byeong Wan Kwon, Sung Pil Yoon |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbon dioxide reforming Mechanical Engineering Inorganic chemistry Doping 02 engineering and technology Building and Construction Management Monitoring Policy and Law 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Methane 0104 chemical sciences Catalysis chemistry.chemical_compound General Energy chemistry X-ray photoelectron spectroscopy Hydroxide 0210 nano-technology Hydrogen production Perovskite (structure) |
| Zdroj: | Applied Energy. 227:213-219 |
| ISSN: | 0306-2619 |
| DOI: | 10.1016/j.apenergy.2017.07.105 |
| Popis: | In this study, novel perovskite-type Sr0.92Y0.08TiO3-based catalysts were investigated for hydrogen production by the dry reforming of biogas (comprising CH4 and CO2). Ni-doped Sr0.92Y0.08TiO3 catalysts with improved catalytic activity were grown using the Pechini method. The prepared catalysts were characterized using X-ray diffraction to check for impurities introduced in the perovskite structure by doping method. The reforming of methane over perovskite-based catalysts has been extensively investigated; however, detailed understanding of the activating catalytic sites under different conditions is still lacking. To understand the details of the activating catalyst mechanism, transmission electron microscopy, temperature-programed reduction, X-ray photoelectron spectroscopic (XPS) analysis were performed under different activating conditions. XPS analysis of 5 mol% Ni-doped Sr0.92Y0.08TiO3 revealed that the H2-activated catalyst lost active lattice oxygen sites and Ni sites due to formation of Ni hydroxide. Thus, the H2-activated catalyst has lower catalytic activity than the N2-activated one. |
| Databáze: | OpenAIRE |
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