| Popis: |
Mineral carbonation is one of the typical carbon capture, utilization, and storage technologies, to obtain synthetic carbonates from metal oxide and CO2. However, the technology is known to be extremely challenging to achieve economic feasibility because expensive chemical solvents used the account for most of the cost. To overcome this limitation, we conducted a pilot laboratory study to secure the economic viability of the technology by replacing these chemical solvents with costless metallic carbon dioxide cylinders. For the current study, we implement cement kiln dust (CKD), which is an alkali industrial by-product, together with mineral CO2 gas. In this research paper, we attained CO2 storage and CaCO3 yield, which is comparable in both quantitative and qualitative respects to the existing studies. With a steady flow rate of 0.9 L/m of carbon dioxide furthermore fixed time, the carbonation of CKD could increase dramatically, reaching 35% calcium carbonate at 550°C and 27% calcium carbonate at 450°C respectively. It was also found that CO2 flow rate is one component, which can elute Ca from CKD, and had significant effects on carbonation efficiency. The solid to liquid ratio was the most influential factor in the Ca elution process. the microstructure, morphology, and thermal traits of the designed patches are characterized using scanning electron microscopy (SEM) to indicate phases composition, X-Ray Diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) measurements. |
