摘要详情
23 / 2023-05-14 16:28:59
Study on high stable biomass gel foam for inhibiting coal spontaneous combustion
super film-forming properties,Gel foam,Biomass,high stability,Coal spontaneous combustion
摘要录用
Coal mine fire caused by coal spontaneous combustion have caused a large number of coal resources burned, and often induced gas explosion, which causes large economic losses to coal mining enterprises and endangers the lives of coal miners [1]. The gel foam inhibition technology has the advantages of both foam and gel. Before losing liquidity, the gel foam presents a foam state with good fluidity and accumulation. Therefore, gel foam has received extensive attention in the field of preventing coal spontaneous combustion, and has gradually become a research hotspot [2-3]. However, the existing gel foam has a short half-life, which cannot meet the needs of long-term inhibition of coal spontaneous combustion in coal mines. Therefore, the stability of gel foam needs to be further improved. Meanwhile, there is still a lack of research on the film-forming properties of gel foam, and excellent film-forming properties can help to reduce air leakage and isolate oxygen, thus further improving the efficiency of gel foam in preventing coal spontaneous combustion.
To further enhance gel foam stability, a super film-forming stabilized biomass gel foam (PE/SA-Ca) with the double network structure was achieved by using pectin (PE), sodium alginate (SA), calcium L-lactate (Ca-L) and biomass foaming systems (BS). The test results showed that the double network gel foam had superior film-forming and stability performances than the single network gel foam. Specifically, when the PE:SA ratio of the double network gel matrix was 5:5, the film thickness of PE/SA-Ca increased from 1 to 4.25 mm and the half-life increased from 3 to 22 days compared to the single network gel foam. In addition, PE /SA-Ca could maintain film integrity at high temperature up to 120 °C. The water retention rates of PE/SA-Ca were increased by 79.5 % compared to pure foam. The inhibition rate of PE/SA-Ca in the inhibition test was as high as 78.06 % at 180 °C. PE/SA-Ca could rapidly reduce the coal fire temperature from 960 to 68.9 °C within 20 min and effectively prevent prevention of coal re-ignition. This research provides a technical method for the development of highly stable, super film-forming and eco-friendly coal fire inhibiting gel foam.
ACKNOWLEDGEMENTS
The authors gratefully acknowledge the National Natural Science Foundation of China (52074011), Outstanding Youth Scientific Research Project in Anhui Province (2022AH020055), Key Research and Development Projects in Anhui Province (2022i01020016), the University Synergy innovation Program of Anhui Province (GXXT-2022-018).
REFERENCE
To further enhance gel foam stability, a super film-forming stabilized biomass gel foam (PE/SA-Ca) with the double network structure was achieved by using pectin (PE), sodium alginate (SA), calcium L-lactate (Ca-L) and biomass foaming systems (BS). The test results showed that the double network gel foam had superior film-forming and stability performances than the single network gel foam. Specifically, when the PE:SA ratio of the double network gel matrix was 5:5, the film thickness of PE/SA-Ca increased from 1 to 4.25 mm and the half-life increased from 3 to 22 days compared to the single network gel foam. In addition, PE /SA-Ca could maintain film integrity at high temperature up to 120 °C. The water retention rates of PE/SA-Ca were increased by 79.5 % compared to pure foam. The inhibition rate of PE/SA-Ca in the inhibition test was as high as 78.06 % at 180 °C. PE/SA-Ca could rapidly reduce the coal fire temperature from 960 to 68.9 °C within 20 min and effectively prevent prevention of coal re-ignition. This research provides a technical method for the development of highly stable, super film-forming and eco-friendly coal fire inhibiting gel foam.
ACKNOWLEDGEMENTS
The authors gratefully acknowledge the National Natural Science Foundation of China (52074011), Outstanding Youth Scientific Research Project in Anhui Province (2022AH020055), Key Research and Development Projects in Anhui Province (2022i01020016), the University Synergy innovation Program of Anhui Province (GXXT-2022-018).
REFERENCE
- Xiaofeng Ren, Xiangming Hu, Di Xue, Yongsheng Li, Zhiang Shao, Hao Dong, Weimin Cheng, Yanyun Zhao, Lin Xin, Wei Lu(2019) Novel sodium silicate/polymer composite gels for the prevention of spontaneous combustion of coal[J]. Journal of hazardous materials, 371:643-654.https://doi.org/10.1016/j.jhazmat.2019.03.041
- Yuanyuan Li, Guoqing Xiao, Fangzhou Li, Chunyan Chen, Chunlin Chen, Rui Li, Rui Zou, Miaosen Zhang(2022) Response Surface Analysis (RSA) optimization of temperature-resistant gel foam fabrication and performance evaluation[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 130260.https://doi.org/10.1016/j.colsurfa.2022.130260
- Song Jiajia, Jun Deng, Jingyu Zhao, Yanni Zhang, C. Shu(2021) Comparative analysis of exothermic behaviour of fresh and weathered coal during low-temperature oxidation[J]. Fuel, 289:119942.https://doi.org/10.1016/j.fuel.2020.119942
重要日期
-
会议日期
08月18日
2023
至08月20日
2023
-
07月07日 2023
初稿截稿日期
-
08月20日 2023
注册截止日期
主办单位
International Committee of Mine Safety Science and Engineering
承办单位
Heilongjiang University of Science and Technology
联系方式
- Mrs. Dr. Li
- i******@ismsse.com
- 188********
历届会议
-
2025年10月10日 中国 Jiaozuo
The 8th International Symposium on Mine Safety Science and Engineering -
2024年08月17日 美国 Pittsburgh
The 7th International Symposium on Mine Safety Science and Engineering (ISMSSE 2024) -
2021年11月21日 波兰 Katowice
The Fifth International Symposium on Mine Safety Science and Engineering -
2018年10月22日 中国
第四届矿山安全科学与工程国际会议 -
2013年09月21日 中国 北京市
第二届矿山安全科学与工程国际学术会议
