Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires
In order to overcome the deficiency of the existing fire control technology and control coal spontaneous combustion by sealing air leakages in coal mines, inorganic solidified foam (ISF) with high closed porosity was developed. The effect of sodium dodecyl sulfate (SDS) concentration on the porosity...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/724548 |
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| author | Yi Lu Botao Qin |
| author_facet | Yi Lu Botao Qin |
| author_sort | Yi Lu |
| collection | DOAJ |
| description | In order to overcome the deficiency of the existing fire control technology and control coal spontaneous combustion by sealing air leakages in coal mines, inorganic solidified foam (ISF) with high closed porosity was developed. The effect of sodium dodecyl sulfate (SDS) concentration on the porosity of the foams was investigated. The results showed that the optimized closed porosity of the solidified foam was 38.65 wt.% for an SDS concentration of approximately 7.4×10-3 mol/L. Based on observations of the microstructure of the pore walls after solidification, it was inferred that an equilibrium between the hydration process and the drainage process existed. Therefore, the ISF was improved using three different systems. Gelatin can increase the viscosity of the continuous phase to form a viscoelastic film around the air cells, and the SDS + gelatin system can create a mixed surfactant layer at gas/liquid interfaces. The accelerator (AC) accelerates the hydration process and coagulation of the pore walls before the end of drainage. The mixed SDS + gelatin + AC systems produced an ISF with a total porosity of 79.89% and a closed porosity of 66.89%, which verified the proposed stabilization mechanism. |
| format | Article |
| id | doaj-art-996c02e95d7e40c5b8b943d28964242e |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-996c02e95d7e40c5b8b943d28964242e2025-08-20T03:37:02ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/724548724548Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal FiresYi Lu0Botao Qin1State Key Laboratory of Coal Resources and Mine Safety, China University of Mining and Technology, Xuzhou, Jiangsu 221008, ChinaState Key Laboratory of Coal Resources and Mine Safety, China University of Mining and Technology, Xuzhou, Jiangsu 221008, ChinaIn order to overcome the deficiency of the existing fire control technology and control coal spontaneous combustion by sealing air leakages in coal mines, inorganic solidified foam (ISF) with high closed porosity was developed. The effect of sodium dodecyl sulfate (SDS) concentration on the porosity of the foams was investigated. The results showed that the optimized closed porosity of the solidified foam was 38.65 wt.% for an SDS concentration of approximately 7.4×10-3 mol/L. Based on observations of the microstructure of the pore walls after solidification, it was inferred that an equilibrium between the hydration process and the drainage process existed. Therefore, the ISF was improved using three different systems. Gelatin can increase the viscosity of the continuous phase to form a viscoelastic film around the air cells, and the SDS + gelatin system can create a mixed surfactant layer at gas/liquid interfaces. The accelerator (AC) accelerates the hydration process and coagulation of the pore walls before the end of drainage. The mixed SDS + gelatin + AC systems produced an ISF with a total porosity of 79.89% and a closed porosity of 66.89%, which verified the proposed stabilization mechanism.http://dx.doi.org/10.1155/2015/724548 |
| spellingShingle | Yi Lu Botao Qin Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires Advances in Materials Science and Engineering |
| title | Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires |
| title_full | Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires |
| title_fullStr | Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires |
| title_full_unstemmed | Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires |
| title_short | Experimental Investigation of Closed Porosity of Inorganic Solidified Foam Designed to Prevent Coal Fires |
| title_sort | experimental investigation of closed porosity of inorganic solidified foam designed to prevent coal fires |
| url | http://dx.doi.org/10.1155/2015/724548 |
| work_keys_str_mv | AT yilu experimentalinvestigationofclosedporosityofinorganicsolidifiedfoamdesignedtopreventcoalfires AT botaoqin experimentalinvestigationofclosedporosityofinorganicsolidifiedfoamdesignedtopreventcoalfires |