Hydrogen-Rich Syngas Production via Ethanol Dry Reforming over Rare-Earth Metal-Promoted Co-based Catalysts
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This chapter is the synopsis of the recent investigation on hydrogen-rich syngas generation using ethanol dry reforming approach over rare-earth metal-supported cobalt catalysts. Ce- and La-promoted and unpromoted 10%Co/Al2O3 catalysts were synthesized by co-impregnation technique and were characterized using a wide range of methods, namely, Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction (XRD) measurement, temperature-programmed oxidation (TPO), H2 temperature-programmed reduction (H2-TPR), NH3 temperature-programmed desorption (NH3-TPD) and Raman spectroscopy measurements. The influence of operating conditions including varying CO2:C2H5OH ratios from 2.5:1 to 1:2.5 and reaction temperature range of 923–973 K was also investigated in this chapter. The addition of both CeO2 and La2O3 promoters facilitated the H2 reduction, enhanced the basic property of catalysts and improved active metal dispersion. Regardless of reaction temperature and reactant composition, La-promoted catalyst exhibited the highest C2H5OH and CO2 conversions followed by Ce-promoted and unpromoted catalysts. The increment of CO2 partial pressure from 20 to 50 kPa enhanced C2H5OH and CO2 conversions by up to 20.0% and 27.4%, respectively. However, reactant conversions significantly declined with growing C2H5OH partial pressure from 20 to 50 kPa. La and Ce addition hindered carbon deposition on catalyst surface during ethanol dry reforming reaction, and the amount of carbon deposition declined from 51.49% to 30.06% with the addition of La.
KeywordsEthanol dry reforming Co-based catalysts Syngas Hydrogen Rare-earth promoter
The authors are grateful for the financial support from UMP Research Grant Scheme (RDU160323) for conducting this research. Fahim Fayaz is also thankful for the Graduate Research Scheme Award (GRS) from Universiti Malaysia Pahang (UMP).
- JCPDS Powder Diffraction File, International Centre for Diffraction Data (2000) SwarthmoreGoogle Scholar
- Kumar A, Bhosale RR, Malik SS, Abusrafa AE, Saleh MAH, Ghosh UK, Al-Marri MJ, Almomani FA, Khader MM, Abu-Reesh IM (2016) Thermodynamic investigation of hydrogen enrichment and carbon suppression using chemical additives in ethanol dry reforming. Int J Hydrogen Energy 41:15149–15157. https://doi.org/10.1016/j.ijhydene.2016.06.157 CrossRefGoogle Scholar
- Montini T, Singh R, Das P, Lorenzut B, Bertero N, Riello P, Benedetti A, Giambastiani G, Bianchini C, Zinoviev S, Miertus S, Fornasiero P (2010) Renewable H2 from glycerol steam reforming: effect of La2O3 and CeO2 addition to Pt/Al2O3 catalysts. ChemSusChem 3:619–628. https://doi.org/10.1002/cssc.200900243 CrossRefPubMedGoogle Scholar
- Papageridis KN, Siakavelas G, Charisiou ND, Avraam DG, Tzounis L, Kousi K, Goula MA (2016) Comparative study of Ni, Co, Cu supported on γ-alumina catalysts for hydrogen production via the glycerol steam reforming reaction. Fuel Process Technol 152:156–175. https://doi.org/10.1016/j.fuproc.2016.06.024 CrossRefGoogle Scholar
- Zhang W, Burckle EC, Smirniotis PG (1999) Characterization of the acidity of ultrastable Y, mordenite, and ZSM-12 via NH3-stepwise temperature programmed desorption and Fourier transform infrared spectroscopy. Microporous Mesoporous Mater 33:173–185. https://doi.org/10.1016/S1387-1811(99)00136-5 CrossRefGoogle Scholar