Experimental study on the effect of cutting parameters to dust production patterns of different brittle coal

Research on Mechanism of Surfactant Improving Wettability of Coking Coal Based on Molecular Dynamics

“…The different forms of carbon in coal and their relative content can be effectively determined by 13 CNMR technology. Figure 2 shows the 13 CNMR spectrum of coking coal.…”

“…The different forms of carbon in coal and their relative content can be effectively determined by 13 CNMR technology. Figure 2 shows the 13 CNMR spectrum of coking coal. The 13 CNMR spectrum of coal samples includes three parts: the aliphatic carbon region from 0 to 75 ppm, the aromatic carbon region from 100 to 165 ppm, and the carbonyl carbon region from 165 to 230 ppm.…”

“…Figure 2 shows the 13 CNMR spectrum of coking coal. The 13 CNMR spectrum of coal samples includes three parts: the aliphatic carbon region from 0 to 75 ppm, the aromatic carbon region from 100 to 165 ppm, and the carbonyl carbon region from 165 to 230 ppm. Based on relevant domestic and international studies, the surfactants sele study include sodium dodecylbenzene sulfonate (SDBS) (Wanhua (Guangzh Chain Service Co. Ltd., Guangzhou, China), nonylphenol ethoxylate (AEO-9 (Guangzhou) Supply Chain Service Co. Ltd., Guangzhou, China), and cocoamid taine (CAB-35) (Wanhua (Guangzhou) Supply Chain Service Co. Ltd., Guangzhou…”

“…Coal resources play an irreplaceable role in the Chinese economy, supporting social production and driving the development of the national economy [1][2][3]. However, safety hazards in coal mining, especially coal dust safety issues, involving occupational hazards [4][5][6], explosion hazards [7][8][9], environmental pollution [10][11][12], and mechanical equipment damage [13][14][15], have become a major challenge that urgently needs to be addressed. The "Healthy China" initiative emphasizes public safety systems and the development of occupational health [16,17].…”

“…However, available studies mainly focus on the impact of water injection parameters and methods on the water injection effect, while research on how to enhance the water injection effect by changing coal quality characteristics is still insufficient. In this study, coking coal was selected as the research object, and we established the coking coal model based on elemental analysis, 13 CNMR, and XPS analysis. In addition, complex systems, including water/coal and water/coal/surfactant, were built.…”