Effect of Ruthenium promotor ratio on Ni/Y2O3 Based Catalysts for CO2 Methanation Reaction | ||||
| Egyptian Journal of Chemistry | ||||
| Article 37, Volume 64, Issue 10, October 2021, Page 5765-5780 PDF (1.11 MB) | ||||
| Document Type: Review Articles | ||||
| DOI: 10.21608/ejchem.2021.51324.3072 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Radwa Abass El-Salamony  1; Sara El-Sharaky2; Seham El-Temtamy2; Ahmed Al-Sabagh3; Hamada Killa4
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| 1process development, Egyptian petroleum research institute | ||||
| 21 Ahmed AlZomer street | ||||
| 3Egyptian petroleum research institute, Nasr city, Cairo, Egypt | ||||
| 4Department of Chemistry, Faculty of Science, Zagazig University, Zagazig | ||||
| Abstract | ||||
| CO2 is one of the main contributors to the greenhouse effect and hence to climate change, there is a growing interest in its use as a feedstock in chemical processes. CO2 methanation has recently gained renewed interest. A series of nickel supported on yttrium oxide and promoted with different ratios of ruthenium was prepared by the wet impregnation method. The developed Ru-Ni/Y2O3 structure was then characterized using N2 adsorption-desorption isotherm, XRD, XPS, TPR, and HTEM techniques to evaluate the surface, crystal phase, and morphology. The catalytic test was conducted with the use of a fixed-bed tubular reactor under atmospheric pressure. Temperature of catalytic performance was 350 °C with a supply of CO2/H2/Ar with a ratio of 1/4/5 and a total flow rate of 200 ml/min. The main products of the reaction were CH4 and water. Traces of carbon monoxide was present among the product. The methane yield was reached 16.4%, 14%, 17.74%, and 14.24% over Ni/Y2O3, 1Ru-Ni/Y2O3, 5Ru-Ni/Y2O3, and 10Ru-Ni/Y2O3 catalysts respectively. The amount of promoter was stated to have affected the catalytic activity but huge numbers usually of promoters diminishing catalytic activity due to active site coverage. However; the increase in Ru loading in the 10Ru-Ni/Y2O3 sample decreased the catalytic activity towards methanation due to the Ru-precursor used (RuCl3.nH2O) in this study. The residual chloride ions form a barrier between the support and the metal, and thus both inhibit CO and hydrogen chemisorption on the catalyst surface. | ||||
| Keywords | ||||
| Ru-Ni bi-metal; CO2 hydrogenation; Methanation; Yttrium oxide; Water | ||||
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