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Understanding the effect of Ca and Mg ions from wastes in the solvent regeneration stage of a biogas upgrading unit

Baena-Moreno, Francisco M., Rodríguez-Galán, Mónica, Reina, T. R., Zhang, Zhien, Vilches, Luis F. and Navarrete, Benito (2019) Understanding the effect of Ca and Mg ions from wastes in the solvent regeneration stage of a biogas upgrading unit Science of the Total Environment, 691. pp. 93-100.

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This paper reveals the effect of calcium and magnesium ions in carbonation experiments carried out to regenerate sodium hydroxide from a biogas upgrading unit. This novel study arises as an alternative to standard physical process whose elevated energy consumption imposes economic restrictions. Previous works employed alkaline waste to turn them into value added product. Nevertheless, no attractive economical results were obtained due to the low regeneration efficiencies. Our hypothesis is that both calcium and magnesium waste composition percentages have an impact in the result, hence this work propose an isolated study aiming to determine the of each one in the global performance. To this end, the operational parameters (reaction time, reaction temperature and molar ratio) were tuned as well as physicochemical properties of the final solid samples were analysed by several techniques. The results indicate that calcium is much more prone than magnesium to reach high efficiencies in aqueous carbonation experiments. Additionally, higher quality products were achieved with calcium. The results of this study suppose an important step for understanding the aqueous carbonation through waste in the path to achieve a more sustainable city and society.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Baena-Moreno, Francisco M.
Rodríguez-Galán, Mónica
Reina, T.
Zhang, Zhien
Vilches, Luis F.
Navarrete, Benito
Date : 15 November 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC), Royal Society
DOI : 10.1016/j.scitotenv.2019.07.135
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Uncontrolled Keywords : Carbon Capture and Utilization; Biogas upgrading; Aqueous carbonation; Waste utilization; Sustainable development
Related URLs :
Depositing User : Clive Harris
Date Deposited : 11 Jul 2019 13:15
Last Modified : 10 Jul 2020 02:08

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