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Guolan Dou,Haihui Xin,Deming Wang,Botao Qin,Xiaoxing Zhong 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.5
In situ series diffuse reflectance FTIR was used to study the effects of poly(ethylene glycol) as a potentialchemical additive inhibiting coal oxidation process at low temperatures. Two coals with different volatile content and,different ash percentages were examined following treatment with 5 wt% poly(ethylene glycol) 200. The surfaces ofsamples both with and without the additive were analyzed at temperature up to 200 oC in air using in situ diffuse reflectanceFTIR. The results showed that poly(ethylene glycol) 200 is capable of inhibiting the oxidation of aliphaticmoieties such as methyl and methylene groups, and also reducing the quantity of surface hydroxyl groups through reactionsthat form more stable ether linkages, thus improving the thermal stability of the coal. A mechanism by whichthe additive interacts with the coal surfaces is proposed.