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Author Grandjean, M. ♦ Filippov, L. ♦ Filippova, I. ♦ Barres, O. ♦ Pelletier, M. ♦ Ghanbaja, J.
Source SpringerLink
Content type Text
Publisher Springer Netherlands
File Format PDF
Copyright Year ©2012
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Brine ♦ Calcium carbonate ♦ Reactivity ♦ Hydration ♦ Desulfurization ♦ Engineering ♦ Environment ♦ Renewable and Green Energy ♦ Industrial Pollution Prevention ♦ Waste Management/Waste Technology ♦ Environmental Engineering/Biotechnology
Abstract The valorization of precipitated carbonates is envisaged for industrial gases treatment in order to avoid waste disposal in landfills. In this paper, the valorization focuses on the desulfurization of fumes by carbonate materials through the semi-wet way. Three carbonated materials are tested: two industrial residues and a limestone of reference. Their composition and size distribution are comparable. Infrared spectroscopy and electron microscopy are used to identify the evolution of mineral and surface composition. Multi-scale study highlights different behaviors between carbonate samples. Laboratory dissolution tests reveal that two industrial residues were clearly more soluble and have a final dissolution degree ≥90 %. The same carbonate materials were then tested at pilot scale. The unit can treat around 1,000–2,000 m$^{3}$/h of industrial fumes enriched in SO$_{2}$ in semi-wet desulfurization process. Injection of H$_{2}$O was tested at constant temperature and Ca/S ratios to optimize the process. Origin of CaCO$_{3}$ particles and hydration properties appear as the main factors controlling desulfurization efficiency. Calcium carbonates precipitated in brines show higher efficiency in SO$_{2}$ conversion rate (40–70 %) in comparison with other carbonate materials in semi-wet way, i.e. limestone or leached wastes (25–35 %). The combination of high dissolution rate of CaCO$_{3}$ particles with surface hydration appears as responsible for this performance.
ISSN 18772641
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2012-12-20
Publisher Place Dordrecht
e-ISSN 1877265X
Journal Waste and Biomass Valorization
Volume Number 4
Issue Number 4
Page Count 11
Starting Page 831
Ending Page 841

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Source: SpringerLink