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Liu Y, Liu S, Li Y, Cao J. Rapid Zeolization of Potassic Rocks by Means of a Microwave‐Assisted Hydrothermal Method. ChemistrySelect 2021. [DOI: 10.1002/slct.202100381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yang Liu
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education School of Chemical Engineering and Technology Hebei University of Technology No. 8 Guangrong Road, Hongqiao Street Tianjin 300130 China
| | - Shanfang Liu
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education School of Chemical Engineering and Technology Hebei University of Technology No. 8 Guangrong Road, Hongqiao Street Tianjin 300130 China
| | - Yun Li
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education School of Chemical Engineering and Technology Hebei University of Technology No. 8 Guangrong Road, Hongqiao Street Tianjin 300130 China
| | - Jilin Cao
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education School of Chemical Engineering and Technology Hebei University of Technology No. 8 Guangrong Road, Hongqiao Street Tianjin 300130 China
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Process Optimization of Potassium Release from K–Feldspar by Combining Calcination and Hydrothermal Method. ChemistrySelect 2020. [DOI: 10.1002/slct.201904278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Study of K-Feldspar and Lime Hydrothermal Reaction: Phase and Mechanism with Reaction Temperature and Increasing Ca/Si Ratio. MINERALS 2019. [DOI: 10.3390/min9010046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To elucidate the physicochemical properties of the artificial silicate composite material, K-feldspar and lime were reacted in mild hydrothermal conditions (different reaction temperatures and various K-feldspar/lime ratios). Formed phases were investigated using various techniques, such as X-ray powder diffraction, the Rietveld method, scanning electron microscopy (SEM), and inductively coupled plasma-optical emission spectrometry. The analysis revealed that tobermorite, grossular (hydrogarnet), alpha-dicalcium silicate hydrate (α-C2SH), amorphous calcium silicate hydrate, potassium carbonate, bütschliite, calcite, and calcium hydroxide formed with various conditions. Both the temperature and the Ca/Si molar ratio in the starting material greatly affected the formation of phases, especially the generation of tobermorite and α-C2SH. The substitution of H4O4 ↔ SiO4 proceeded with the increase of the Ca/Si molar ratio rather than the reaction temperature and the reaction time. More hydrogen was incorporated in hydrogarnet through the substitution of H4O4 ↔ SiO4 with the increase of the Ca/Si molar ratio in the starting material. Due to the properties of tobermorite as a cation exchanger and its potential applications in hazardous waste disposal, experimental parameters should be optimized to obtain better performance of the artificial silicate composite material from K-feldspar and lime hydrothermal reaction. The dissolution mechanism of K-feldspar was also discussed.
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