Production of precipitated calcium carbonate particles from gypsum waste using venturi tubes as a carbonation zone
| Autor: | İsmail Yiğit Seçkin, Mahmut Altiner, Soner Top, Burçin Kaymakoğlu, Hüseyin Vapur |
|---|---|
| Přispěvatelé: | Çukurova Üniversitesi |
| Rok vydání: | 2019 |
| Předmět: |
Desulfurization gypsum
Gypsum Sorbent Materials science Scanning electron microscope Carbonation Calcite crystals 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Chemical Engineering (miscellaneous) Waste Management and Disposal Precipitated calcium carbonate Process Chemistry and Technology Mineral carbonation 021001 nanoscience & nanotechnology 0104 chemical sciences Flue-gas desulfurization Volumetric flow rate Chemical engineering Venturi effect Venturi tube engineering Particle size 0210 nano-technology |
| Zdroj: | Journal of CO2 Utilization. 29:117-125 |
| ISSN: | 2212-9820 |
| DOI: | 10.1016/j.jcou.2018.12.004 |
| Popis: | In this study, we investigated the production of precipitated calcium carbonate (PCC) particles from desulfurization gypsum (DG) waste using a new experimental apparatus that is divided into two main parts: carbonation and stabilization zones. The solution was circulated via a pump from the stabilization zone to the carbonation zone where different types of Venturi tube were used for the reaction of CO 2 with solution to produce PCC particles. The effects of CO 2 flow rate, circulation rate, and Venturi types on the properties of the produced PCC particles were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), and particle size analyses. The conductivity and pH values of the solution were monitored during the carbonation. In addition, the reactivity of selected PCC was determined to evaluate its use as a sorbent in a desulfurization unit. The experimental results indicate that the Venturi tube had a strong effect on the reaction time and properties of PCC particles. The use of a Venturi tube resulted in a decrease in the time required for producing PCC particles, which were smooth, well-crystallized, and nano-sized cubic crystals. However, when no Venturi tube was used, hollow spherical crystals formed along with cubic crystals. It was found that the reactivity of selected PCC particles produced using Venturi tube was rather higher (52 × 10 -4 min -1 ), indicating that the PCC can be used as a sorbent in the desulfurization unit. © 2018 Elsevier Ltd. All rights reserved.. Çukurova Üniversitesi: FBA-2017-7912 This study was supported by Çukurova University [Project ID: FBA-2017-7912]. Appendix A |
| Databáze: | OpenAIRE |
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