期刊
APPLIED CLAY SCIENCE
卷 161, 期 -, 页码 119-126出版社
ELSEVIER
DOI: 10.1016/j.clay.2018.04.021
关键词
Mineral carbonation; Mineral sequestration; Carbon capture and storage; Ceramic bricks; Common clay; Sealing rock
资金
- Andalucia Government (RDCCO2 Project) [P12-RNM-568]
- V Plan Propio de Investigacian from the University of Seville (Spain)
This research explores the possibilities of CO2 sequestration on ceramic bricks in a short time and at surface conditions. The experiment was carried out in a specially designed reaction chamber, filled with brick wastes and sealed with common clays. The brick used were composed of quartz, wollastonite, diopside, orthoclase and anhydrite, and the common clay was a marl composed of calcite, quartz, illite, smectite and kaolinite. Experimental condition in the reaction chamber were: reaction time 5 months, pressure of CO2 0.5 bar, 4:1 solid/water ratio. The experiment was followed by XRD, XRF, BET, physical sorption by N-2 and CO2, Hg porosity, TGDTA, SEM and ICP-EOS. After the CO2 treatment, wollastonite and anhydrite were practically destroyed and some diopside and orthoclase. Calcite precipitated as new phase (up to 48 wt%), and small amount of illite was the result of orthoclase alteration. Concerning the sealing clay, the CO2 produced an increment of calcite content (from 32 to 41 wt%) and a partial destruction of smectite, particularly close to the upper part of the brick layer. These results are hopeful in relation with the possible mineral carbonation of building ceramic waste in a short time at surface conditions, and open the opportunity to use those wastes for CO2 trapping in an appropriate system, as a quarry reclamation.
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