{"title":"液态二氧化碳抑制煤炭自燃的研究","authors":"Haifei Yao, Jian Hu, Lang Zhang, Shaoping Hu, Yaoqiang Wang, Xaiowa Mao, Dongyang Liu, Kangbo Cao, Youxin Zhao","doi":"10.3103/S0361521923080086","DOIUrl":null,"url":null,"abstract":"<p>To study the inerting and cooling characteristics of liquid CO<sub>2</sub> in coal mine, the coal samples before and after liquid CO<sub>2</sub> inerting treatment were analyzed and studied. The results of temperature-programmed oxidation experiment show that the coal sample can inhibit the oxidation of coal to a certain extent after liquid CO<sub>2</sub> inerting. The TG-DSC experiment results show that T1 and T2 of treated coal are higher than those of raw coal, which indicates that the desorption and heat absorption of CO<sub>2</sub> has a more obvious effect on the early stage of coal oxidation at low temperature. The characteristic temperature T3 and T4 of L‑CO<sub>2</sub> coal are lower than that of raw coal, indicating that the oxidation rate of raw coal is faster. The T4 of L-CO<sub>2</sub> coal is higher than that of raw coal. The results showed that L-CO<sub>2</sub> inhibited spontaneous combustion of coal. After the coal sample was treated with liquid CO<sub>2</sub>, the apparent activation energy of the coal increased slightly. The heat release of raw coal is 10.78% higher than that of treated coal samples. From the point of view of heat change, it shows that raw coal is more prone to spontaneous combustion. Liquid CO<sub>2</sub> has a good cooling and inerting effect on fire prevention.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"57 7","pages":"513 - 518"},"PeriodicalIF":0.8000,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on Inhibition of Spontaneous Combustion of Coal by Liquid CO2\",\"authors\":\"Haifei Yao, Jian Hu, Lang Zhang, Shaoping Hu, Yaoqiang Wang, Xaiowa Mao, Dongyang Liu, Kangbo Cao, Youxin Zhao\",\"doi\":\"10.3103/S0361521923080086\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>To study the inerting and cooling characteristics of liquid CO<sub>2</sub> in coal mine, the coal samples before and after liquid CO<sub>2</sub> inerting treatment were analyzed and studied. The results of temperature-programmed oxidation experiment show that the coal sample can inhibit the oxidation of coal to a certain extent after liquid CO<sub>2</sub> inerting. The TG-DSC experiment results show that T1 and T2 of treated coal are higher than those of raw coal, which indicates that the desorption and heat absorption of CO<sub>2</sub> has a more obvious effect on the early stage of coal oxidation at low temperature. The characteristic temperature T3 and T4 of L‑CO<sub>2</sub> coal are lower than that of raw coal, indicating that the oxidation rate of raw coal is faster. The T4 of L-CO<sub>2</sub> coal is higher than that of raw coal. The results showed that L-CO<sub>2</sub> inhibited spontaneous combustion of coal. After the coal sample was treated with liquid CO<sub>2</sub>, the apparent activation energy of the coal increased slightly. The heat release of raw coal is 10.78% higher than that of treated coal samples. From the point of view of heat change, it shows that raw coal is more prone to spontaneous combustion. Liquid CO<sub>2</sub> has a good cooling and inerting effect on fire prevention.</p>\",\"PeriodicalId\":779,\"journal\":{\"name\":\"Solid Fuel Chemistry\",\"volume\":\"57 7\",\"pages\":\"513 - 518\"},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2024-03-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Solid Fuel Chemistry\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.3103/S0361521923080086\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid Fuel Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.3103/S0361521923080086","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
摘要 为研究液态二氧化碳在煤矿中的惰化降温特性，对液态二氧化碳惰化处理前后的煤样进行了分析研究。温度编程氧化实验结果表明，煤样经液态 CO2 惰化后能在一定程度上抑制煤的氧化。TG-DSC实验结果表明，处理后煤样的T1和T2均高于原煤，说明CO2的解吸和吸热作用对低温下煤氧化初期的影响更为明显。L-CO2 煤的特征温度 T3 和 T4 低于原煤，说明原煤的氧化速度较快。L-CO2 煤的 T4 比原煤高。结果表明，L-CO2 能抑制煤的自燃。煤样经液态 CO2 处理后，煤的表观活化能略有增加。原煤的放热量比处理过的煤样高 10.78%。从热量变化的角度来看，这表明原煤更容易自燃。液态二氧化碳具有良好的冷却和惰性防燃效果。
Study on Inhibition of Spontaneous Combustion of Coal by Liquid CO2
To study the inerting and cooling characteristics of liquid CO2 in coal mine, the coal samples before and after liquid CO2 inerting treatment were analyzed and studied. The results of temperature-programmed oxidation experiment show that the coal sample can inhibit the oxidation of coal to a certain extent after liquid CO2 inerting. The TG-DSC experiment results show that T1 and T2 of treated coal are higher than those of raw coal, which indicates that the desorption and heat absorption of CO2 has a more obvious effect on the early stage of coal oxidation at low temperature. The characteristic temperature T3 and T4 of L‑CO2 coal are lower than that of raw coal, indicating that the oxidation rate of raw coal is faster. The T4 of L-CO2 coal is higher than that of raw coal. The results showed that L-CO2 inhibited spontaneous combustion of coal. After the coal sample was treated with liquid CO2, the apparent activation energy of the coal increased slightly. The heat release of raw coal is 10.78% higher than that of treated coal samples. From the point of view of heat change, it shows that raw coal is more prone to spontaneous combustion. Liquid CO2 has a good cooling and inerting effect on fire prevention.
期刊介绍：
The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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