Solidifying dust suppressant based on modified chitosan and experimental study on its dust suppression performance

• Published in: Adsorption science & technology Vol. 36; no. 1-2; pp. 640 - 654
• Main Authors: Liu, Yanghao, Nie, Wen, Jin, Hu, Ma, He, Hua, Yun, Cai, Peng, Wei, Wenle
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.02.2018; Sage Publications Ltd; SAGE Publishing
• Subjects: Bunkers; Chemical synthesis; Chitosan; Coal; Dust; Electron microscopes; Erosion rates; Erosion resistance; Fourier transforms; Materials handling; Organic chemistry; Viscosity; Wind effects; Wind erosion; Wind resistance; Wind speed; chitosan modification; wind erosion resistance test; Solidifying dust suppressant; Fourier transform infrared spectroscopy; scanning electron microscope; viscosity test
• ISSN: 0263-6174; 2048-4038
• DOI: 10.1177/0263617417713624

In view of the fugitive dusts caused by wind disturbance and material handling in coal bunkers, surface plants, and open-air coal stocking yards of coal businesses, the solidifying dust suppressant based on modified chitosan is synthesized and prepared through the chemical modification of –NH2 with chitosan as a raw material and –NH2 was replaced by –CH2CH(OH)CH2N+(CH3)CI− through the technique of Fourier transform infrared spectroscopy. According to viscosity experiment results, the viscosity of the modified solidifying dust suppressant increased significantly. The coal particles suppressed by the dust suppressant as observed with a 50,000X scanning electron microscope were coagulated together, which indicated very good cohesion effect. In addition, wind erosion resistance experiment was conducted to analyze the wind erosion rate of coal powders before and after sprayed with the suppressant at different wind speeds, which indicated that the dust suppressant can effectively prevent fugitive dusts at a wind speed of 17 m/s.