![]() Therefore, the exploitation of coalbed methane is a “win–win” strategy to energy utilization, environmental protection, and mining safety. Excessive accumulation of coalbed methane may also cause coal seam dynamic disaster. On the contrary, if coalbed methane is directly emitted into the atmosphere without utilization, its greenhouse effect is far greater than that of carbon dioxide. Coalbed methane has a high calorific value and basically does not produce exhaust gas after spontaneous combustion, so it is high-quality clean energy. 202210755011 will be used for the publication of papers.Ĭompeting interests: The authors have declared that no competing interests exist.Ĭoalbed methane, an unconventional natural gas associated with coal, is mainly composed of methane. U1903112 was used for the preparation and chemical analysis of coal samples, while the funder of Grant No. U1903112) and the Xinjiang University National College Student Innovation Training Program (Grant No. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: All relevant data are within the paper.įunding: This study was supported by the National Natural Science Foundation of China (Grant No. Received: OctoAccepted: MaPublished: April 12, 2023Ĭopyright: © 2023 Yao et al. PLoS ONE 18(4):Įditor: Nor Adilla Rashidi, Universiti Teknologi Petronas: Universiti Teknologi PETRONAS, MALAYSIA These insights can be used to evaluate the safety of microwave technology when applied to coal engineering.Ĭitation: Yao J, Chen H, Guo C, Liu K (2023) Effect of moisture on microwave ignition of bituminous coal. There is a permeability threshold, above which the average ignition time of water-saturated coal samples is longer than that of dry coal samples, but below which the opposite is true. The pore water in low permeability coal is conducive to microwave ignition, while the pore water in high permeability coal will prolong the ignition time. Microwave ignition of water-saturated coal is mainly affected by microwave power and coal permeability. During the experiment, permeability of coal samples was obtained based on nuclear magnetic resonance(NMR) test, then different power of microwaves were applied to coal samples, and the occurrence of hot spots within coal samples was regarded as a sign of microwave ignition. This study used two group of bituminous coal after drying and water saturation treatment, for experimental testing and contrastive analysis. ![]() The interaction between water and microwave is of vital importance to reveal the microwave ignition mechanism of water-bearing coal.
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