Whole Process Inhibition of a Composite Superabsorbent Polymer-Based Antioxidant on Coal Spontaneous Combustion

Zhong, Yan; Yang, Shengqiang; Hu, Xincheng; Cai, Jiawen; Tang, Zongqing; Xu, Qin

doi:10.1007/s13369-018-3167-5

Cited by 38 publications

(4 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among all kinds of existing fire prevention technologies, research on the use of inhibitors for fire prevention is still in the process of development [6][7][8][9]. Currently, commonly used inhibitors can be divided into the following: (1) Liquid film is formed on the surface of the coal seam via inhibition mechanisms, thereby preventing further contact reactions between coal molecules and oxygen in the air.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Microstructural Characterization of Retardation Capacity of Microbial Inhibitors to Spontaneous Lignite Combustion

Wang,

Liu,

Chen

et al. 2023

Fire

View full text Add to dashboard Cite

Mine fires are one of the common major disasters in underground mining. In addition to the external fire sources generated by mining equipment and mechanical and electrical equipment during operations, coal is exposed to air during mining, and spontaneous combustion is also the main cause of mine fires. In order to reduce the hidden danger of coal mines caused by spontaneous coal combustion during lignite mining, the microbial inhibition of coal spontaneous combustion is proposed in this paper. Via SEM, pore size analysis, and NMR and FT-IR experiments, the mechanism of coal spontaneous combustion is discussed and revealed. The modification of lignite before and after the addition of retardants is analyzed from the perspective of microstructure, and the change in flame retardancy of the lignite treated with two retardants compared with raw coal is explored. The results show that, compared with raw coal, a large number of calcium carbonate particles are attached to the surface of the coal sample after bioinhibition treatment, and the total pore volume and specific surface area of the coal sample after bioinhibition treatment are decreased by 68.49% and 74.01%, respectively, indicating that bioinhibition can effectively plug the primary pores. The results of NMR and Fourier infrared spectroscopy show that the chemical structure of the coal sample is mainly composed of aromatic carbon, followed by fatty carbon and carbonyl carbon. In addition, the contents of active groups (hydroxyl, carboxyl, and methyl/methylene) in lignite after bioretardation are lower than those in raw coal, and methyl/methylene content is decreased by 96.5%. The comparison shows that the flame-retardant performance of biological retardants is better than that of chemical retardants, which provides an effective solution for the efficient prevention and control of spontaneous combustion disasters in coal mines.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Microstructural Characterization of Retardation Capacity of Microbial Inhibitors to Spontaneous Lignite Combustion

Wang,

Liu,

Chen

et al. 2023

Fire

View full text Add to dashboard Cite

show abstract

“…The chloride inhibitors also have a certain corrosive impact on the underground metal equipment of coal mines. The temperature‐programmed oxidation, differential scanning calorimetry and TG/DSC‐FTIR coupling technology are often used to investigate the evolutions of coal mass, heat and gaseous products during coal spontaneous combustion 23‐25 . In addition, activation energy is an important indicator for evaluating coal combustion reaction performance 26 .…”

Section: Introductionmentioning

confidence: 99%

“…The temperature-programmed oxidation, differential scanning calorimetry and TG/DSC-FTIR coupling technology are often used to investigate the evolutions of coal mass, heat and gaseous products during coal spontaneous combustion. [23][24][25] In addition, activation energy is an important indicator for evaluating coal combustion reaction performance. 26 Various functional groups measured by FTIR reflect the micro-characteristics of coal.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the suppression characteristic of deoxidization gel foam on coal spontaneous combustion

Xue

Wang

et al. 2021

Fire and Materials

View full text Add to dashboard Cite

Summary Mine fire caused by coal spontaneous combustion is one of the main safety problems in mining. For the purpose of developing a more effective inhibitor to suppress the coal spontaneous combustion, a compound deoxidization gel foam inhibitor was proposed by combining sodium dithionite deoxidizer with gel foam. An experimental platform was self‐built to evaluate the suppression characteristic of deoxidization gel foam. Experimental results showed that the deoxidization gel foam reduced the oxygen concentration to below 14% within 180 minutes. STA‐FTIR test indicated that the deoxidization gel foam raised the active temperature from 250.57°C to 275.18°C and reduced CO2 absorption peak from 0.2926 to 0.2201 at the reaction temperature 20°C. The activation energy was also increased from 85.69 to 95.59 kJ·mol−1 in thermal decomposition combustion that exhibited an excellent flame‐retardant efficacy on the coal, especially at the low temperature stage. CH3 and CH2 were reduced by 56.86% and 47.17% processed by deoxidization gel foam. Meanwhile, the significant reduction in the content of reductive functional groups indicated that the new inhibitor had a strong suppression capacity for coal spontaneous combustion. Based on above research, it is believed that this study will lay an important foundation in the widespread application of deoxidization gel foam technology for coal spontaneous combustion prevention in underground mines.

show abstract

“…Imidazolium-based ionic liquids − inhibit the spontaneous combustion of coal by destroying active functional groups in coal. There are also some composite inhibitors, − which have a role in inhibiting the spontaneous combustion of coal by physical and chemical interactions. However, there are few studies on inhibiting the action of metals as catalysts to inhibit the spontaneous combustion of coal.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on a Metal-Chelating Agent Inhibiting Spontaneous Combustion of Coal

et al. 2019

View full text Add to dashboard Cite

In order to inhibit the intrinsic metal in coal to catalyze the spontaneous combustion of coal, three different types of metal-chelating agents were selected to react fully with coal, and thermogravimetric and differential scanning calorimetry curves of coal samples and gas generated during coal oxidation were obtained through temperature-programmed experiments. The effects of these additives on coal spontaneous combustion were analyzed by characteristic temperature, exothermic peak parameters, and CO and CO2 emission laws. The results show that the addition of oxalic acid promotes the spontaneous combustion of coal, ethylenediaminetetraacetic acid, and phytic acid and can inhibit the spontaneous combustion of coal, and the inhibition effect of phytic acid is better. The mechanism of phytic acid inhibition of coal samples was analyzed by Fourier transform infrared spectroscopy. It was found that phytic acid can capture metal ions in coal to form stable chelates. The oxygen-containing functional groups in coal combine to form an ether, ester, and hydrogen-bonded cross-linking structure, which improve the stability of coal macromolecules. In the oxidation reaction, phytic acid reduces the free radical content of the system and inhibits the chemical adsorption of coal to oxygen, thereby delaying the spontaneous combustion of coal. The inhibitory effect of phytic acid on the spontaneous combustion of coal with different metamorphic degrees was compared. It was found that phytic acid had a significant inhibitory effect on low rank coal. The minerals in the coal were analyzed by water and hydrochloric acid treatment, and it was found that the phytic acid was mainly combined with the exchangeable minerals in the coal. It is considered that phytic acid is a new type of high-efficiency low rank coal spontaneous combustion inhibitor, and it is very friendly to the environment. The results can provide new ideas for preventing the spontaneous combustion of coal.

show abstract

Whole Process Inhibition of a Composite Superabsorbent Polymer-Based Antioxidant on Coal Spontaneous Combustion

Cited by 38 publications

References 45 publications

Experimental Study on the Microstructural Characterization of Retardation Capacity of Microbial Inhibitors to Spontaneous Lignite Combustion

Experimental Study on the Microstructural Characterization of Retardation Capacity of Microbial Inhibitors to Spontaneous Lignite Combustion

Investigation on the suppression characteristic of deoxidization gel foam on coal spontaneous combustion

Experimental Study on a Metal-Chelating Agent Inhibiting Spontaneous Combustion of Coal

Contact Info

Product

Resources

About