期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 691, 期 -, 页码 93-100出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.07.135
关键词
Carbon capture and utilization; Biogas upgrading; Aqueous carbonation; Waste utilization; Sustainable development
资金
- EMASESA through NURECCO2 project
- Corporacion Tecnologica de Andalucia (CTA)
- University of Seville through V PPIT-US
- EPSRC [EP/R512904/1]
- Royal Society [RSGR1180353]
- CO2Chem UK through the EPSRC [EP/P026435/1]
- EPSRC [EP/P026435/1] Funding Source: UKRI
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 analyzed 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. (C) 2019 Elsevier B.V. All rights reserved.
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