A novel iron aluminate composite polymer particle for high-efficiency self-coating solar heat reflection

Omsinsombon, Jittipat; Chaiyasat, Amorn; Busabok, Chumphol; Chaiyasat, Preeyaporn

doi:10.1016/j.solmat.2021.111248

Cited by 4 publications

(1 citation statement)

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“…Significantly, the adsorption bond located at 875 cm −1 associated with inert sillimanite (Al 2 SiO 5 ) was detected after co-roasting at temperatures ranging from 700 °C to 900 °C [ 45 ]. Furthermore, the characteristic peaks of hercynite (FeAl 2 O 4 ) related to Fe-O at 579 cm −1 and Al-O bond at 722 cm −1 were observed after co-roasting within the temperature range of 800 °C–900 °C [ 47 ]. These findings are consistent with the XRD results, providing further evidence for the formation of new inert components contributing to the decrease in leaching rates of Al 3+ and TFe.…”

Section: Resultsmentioning

confidence: 99%

Study on Extraction Valuable Metal Elements by Co-Roasting Coal Gangue with Coal Gasification Coarse Slag

Zhao,

Yu,

Zhang

et al. 2023

Molecules

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Coal gangue (CG) and coal gasification coarse slag (CGCS) possess both hazardous and resourceful attributes. The present study employed co-roasting followed by H2SO4 leaching to extract Al and Fe from CG and CGCS. The activation behavior and phase transformation mechanism during the co-roasting process were investigated through TG, XRD, FTIR, and XPS characterization analysis as well as Gibbs free energy calculation. The results demonstrate that the leaching rate of total iron (TFe) reached 79.93%, and Al3+ achieved 43.78% under the optimized experimental conditions (co-roasting process: CG/CGCS mass ratio of 8/2, 600 °C, 1 h; H2SO4 leaching process: 30 wt% H2SO4, 90 °C, 5 h, liquid to solid ratio of 5:1 mL/g). Co-roasting induced the conversion of inert kaolinite to active metakaolinite, subsequently leading to the formation of sillimanite (Al2SiO5) and hercynite (FeAl2O4). The iron phases underwent a selective transformation in the following sequence: hematite (Fe2O3) → magnetite (Fe3O4) → wustite (FeO) → ferrosilite (FeSiO3), hercynite (FeAl2O4), and fayalite (Fe2SiO4). Furthermore, we found that acid solution and leached residue both have broad application prospects. This study highlights the significant potential of co-roasting CG and CGCS for high-value utilization.

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Section: Resultsmentioning

confidence: 99%