Preparation of SiO<sub>2</sub> Aerogel from Coal Gangue by One-step Acid-base Catalytic Method

LIU Weihai; LI Shuming; WU Zemin; YANG Bo; ZHANG Dezhong; CHEN Huanle; XIA Chenkang; SHANG Yang; HU Bo; ZHANG Xinyuan; MIAO Yang; GAO Feng

doi:10.13779/j.cnki.issn1001-0076.2022.01.024

2022 Vol. 42, No. 1

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Article navigation > Conservation and Utilization of Mineral Resources > 2022 > 42(1): 165-171

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LIU Weihai, LI Shuming, WU Zemin, YANG Bo, ZHANG Dezhong, CHEN Huanle, XIA Chenkang, SHANG Yang, HU Bo, ZHANG Xinyuan, MIAO Yang, GAO Feng. Preparation of SiO2 Aerogel from Coal Gangue by One-step Acid-base Catalytic Method[J]. Conservation and Utilization of Mineral Resources, 2022, 42(1): 165-171. doi: 10.13779/j.cnki.issn1001-0076.2022.01.024

Citation:

LIU Weihai, LI Shuming, WU Zemin, YANG Bo, ZHANG Dezhong, CHEN Huanle, XIA Chenkang, SHANG Yang, HU Bo, ZHANG Xinyuan, MIAO Yang, GAO Feng. Preparation of SiO₂ Aerogel from Coal Gangue by One-step Acid-base Catalytic Method[J]. Conservation and Utilization of Mineral Resources, 2022, 42(1): 165-171. doi: 10.13779/j.cnki.issn1001-0076.2022.01.024

Preparation of SiO₂ Aerogel from Coal Gangue by One-step Acid-base Catalytic Method

1.
School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Research and Development Center of Nagu (Shanxi) Aerogel Innovation City Management Co. LTD. Yangmei Group, Yangquan 045000, China

More Information

Corresponding author: MIAO Yang, miaoyang198781@163.com

Received Date: 11 December 2021

Publish Date: 25 February 2022

Abstract

Abstract

Using coal gangue from Shuozhou, Shanxi as a single silicon source, superhydrophobic silica aerogel materials were prepared by acid-base one-step catalytic method. The effects of hydrochloric acid concentration and acid leaching temperature on alumina leaching, sodium hydroxide concentration and alkali leaching temperature on silica leaching, and the effects of hydrochloric acid concentration on aerogel under acid-base one-step catalysis were investigated by single factor leaching test. The results showed that: when hydrochloric acid concentration in acid leaching process was 3 mol/L, acid leaching temperature was 100 ℃, sodium hydroxide concentration was 3 mol/L, alkali leaching temperature was 80 ℃, and hydrochloric acid concentration in acid-base one-step catalytic process was 2 mol/L, the leaching rate of alumina and silica was 81.26% and 86.53%, respectively. The bulk density, specific surface area and hydrophobic angle of aerogels could be 0.04 g/cm³, 610.68 m²/g and 144.8°, respectively. This technology could provide an effective way for comprehensive utilization of coal gangue.
- coal gangue /
- acid base one-step catalysis /
- waste treatment /
- silica /
- aerogel /
- ambient pressure drying

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References

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