Xiao Feng , Zizhong Zhang , Hongguang Guo , Zhigang Li , Zaixing Huang , Michael Urynowicz
{"title":"利用超临界CO2提高煤生物甲烷产率","authors":"Xiao Feng , Zizhong Zhang , Hongguang Guo , Zhigang Li , Zaixing Huang , Michael Urynowicz","doi":"10.1016/j.supflu.2023.106023","DOIUrl":null,"url":null,"abstract":"<div><p><span>Supercritical CO</span><sub>2</sub> (ScCO<sub>2</sub>) extraction could improve the bioavailability of coal for the enhancement of biogenic methane production. Here, the influence of prolonged ScCO<sub>2</sub> extraction on methane yield was investigated since in-situ ScCO<sub>2</sub> injection is time-consuming. The results showed that the enhancement of biomethane production from coal was negatively correlated with extraction time and extraction yield. With the extension of ScCO<sub>2</sub> extraction time from 0.5 day to 28 days, the methane yield of extracted coals increased by 20.1∼111.4% than that of raw coal. ScCO<sub>2</sub> mainly reacted with the organic structures on the surface of coal (such as the C-O and CH<sub>2</sub>-C<img>O), rarely the skeleton structure. In the prolonged extraction, aromatics were first extracted, then oxygen-containing matters and aliphatics which reduces the methane production of extracted coal but increases the methane generation potential of extractable organic matter. Then, a conceptual model of ScCO<sub>2</sub>-MECBM was proposed for enhancing methane recovery in-situ.</p></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106023"},"PeriodicalIF":3.4000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancement of biogenic methane production from coal using supercritical CO2\",\"authors\":\"Xiao Feng , Zizhong Zhang , Hongguang Guo , Zhigang Li , Zaixing Huang , Michael Urynowicz\",\"doi\":\"10.1016/j.supflu.2023.106023\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>Supercritical CO</span><sub>2</sub> (ScCO<sub>2</sub>) extraction could improve the bioavailability of coal for the enhancement of biogenic methane production. Here, the influence of prolonged ScCO<sub>2</sub> extraction on methane yield was investigated since in-situ ScCO<sub>2</sub> injection is time-consuming. The results showed that the enhancement of biomethane production from coal was negatively correlated with extraction time and extraction yield. With the extension of ScCO<sub>2</sub> extraction time from 0.5 day to 28 days, the methane yield of extracted coals increased by 20.1∼111.4% than that of raw coal. ScCO<sub>2</sub> mainly reacted with the organic structures on the surface of coal (such as the C-O and CH<sub>2</sub>-C<img>O), rarely the skeleton structure. In the prolonged extraction, aromatics were first extracted, then oxygen-containing matters and aliphatics which reduces the methane production of extracted coal but increases the methane generation potential of extractable organic matter. Then, a conceptual model of ScCO<sub>2</sub>-MECBM was proposed for enhancing methane recovery in-situ.</p></div>\",\"PeriodicalId\":17078,\"journal\":{\"name\":\"Journal of Supercritical Fluids\",\"volume\":\"201 \",\"pages\":\"Article 106023\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2023-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Supercritical Fluids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0896844623001870\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supercritical Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0896844623001870","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Enhancement of biogenic methane production from coal using supercritical CO2
Supercritical CO2 (ScCO2) extraction could improve the bioavailability of coal for the enhancement of biogenic methane production. Here, the influence of prolonged ScCO2 extraction on methane yield was investigated since in-situ ScCO2 injection is time-consuming. The results showed that the enhancement of biomethane production from coal was negatively correlated with extraction time and extraction yield. With the extension of ScCO2 extraction time from 0.5 day to 28 days, the methane yield of extracted coals increased by 20.1∼111.4% than that of raw coal. ScCO2 mainly reacted with the organic structures on the surface of coal (such as the C-O and CH2-CO), rarely the skeleton structure. In the prolonged extraction, aromatics were first extracted, then oxygen-containing matters and aliphatics which reduces the methane production of extracted coal but increases the methane generation potential of extractable organic matter. Then, a conceptual model of ScCO2-MECBM was proposed for enhancing methane recovery in-situ.
期刊介绍：
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.
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