Influence of NiO/La2O3 Catalyst Preparation Method on Its Reactivity in the Oxy-Steam Reforming of LNG Process
| Autor: | Pawel Mierczynski, Malgorzata I. Szynkowska-Jozwik, Waldemar Maniukiewicz, Magdalena Mosinska |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Thermal desorption spectroscopy hydrogen production OSR-LNG NiLa2O4 Chemical technology Non-blocking I/O TP1-1185 Catalysis law.invention Steam reforming Chemistry Chemical engineering NiO/La2O3 catalyst law Reactivity (chemistry) Calcination Physical and Theoretical Chemistry Temperature-programmed reduction LaNiO3 oxy-steam reforming of liquefied natural gas QD1-999 Syngas |
| Zdroj: | Catalysts, Vol 11, Iss 1174, p 1174 (2021) Catalysts Volume 11 Issue 10 |
| ISSN: | 2073-4344 |
| Popis: | The oxy-steam reforming of liquefied natural gas reaction (OSR-LNG) is promising process for syngas generation. In this paper, the catalytic properties of NiO/La2O3 systems prepared by wet impregnation and co-precipitation methods were extensively investigated in OSR-LNG reaction. The physicochemical properties of the studied catalytic materials were determined using various techniques including Temperature programmed reduction (TPR-H2), Temperature programmed desorption (TPD-NH3), Brunauer, Emmett and Teller (BET), X-ray diffraction (XRD) and Scanning electron microscopy (SEM) with an energy dispersive X-Ray spectrometer (EDS). Reactivity measurements performed in the OSR-LNG process showed that the catalyst preparation method and the calcination temperature significantly affected the activity of NiO/La2O3 catalysts in the OSR-LNG reaction. The catalytic activity tests showed that NiO/La2O3 system prepared by a wet impregnation method and calcined at 700 °C showed the total conversion of the LNG component at 900 °C and the highest H2 yield at 700 and 900 °C. The phase composition studies confirmed the formation of the LaNiO3 structure in the case of the NiO/La2O3 catalyst prepared by wet impregnation, calcined at the temperature of 700 °C. Catalytic activity measurements showed that the reactivity of the catalysts was related to their phase composition and acidity. SEM images of spent catalysts showed that the smallest amount of carbon deposit was detected on the surface of the most active systems. |
| Databáze: | OpenAIRE |
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