【摘要】：基于動力學(xué)與熱力學(xué)理論,研究了煤升溫過程中C,H,O,N,S五種基本元素的遷移轉(zhuǎn)化規(guī)律,同時根據(jù)紅外實驗分析了煤中主要官能團變化趨勢。結(jié)果表明,煤樣在物理吸附和化學(xué)吸附階段,碳氧化合物變化占主導(dǎo)地位,在化學(xué)反應(yīng)階段,碳氫化合物和含氮化合物變化頻率超過碳氧化物。低溫氧化過程中,H元素的表觀活化能最小,N元素表觀活化能最大,而O,S元素的表觀活化能為負值,C,H,N元素遷移過程為吸熱反應(yīng),O,S元素轉(zhuǎn)化過程是放熱反應(yīng)。煤中脂肪族C—H在煤溫上升的過程含量逐漸降低。煤中COOH含量與總體的C=O含量變化趨勢一致,當(dāng)溫度超過120℃以后,兩者含量逐漸增加,此外對煤低溫氧化過程涉及到的化學(xué)反應(yīng)步驟也進行了研究推導(dǎo)。
[Abstract]:The migration and transformation of C, H, O, N and S in the coal-heating process are studied based on the theory of dynamics and thermodynamics, and the variation trend of the main functional groups in the coal is analyzed according to the infrared experiment. The results show that the change of the carbon-oxygen compound is dominant in the physical adsorption and chemisorption stage, and the frequency of the change of the hydrocarbon and the nitrogen-containing compound in the chemical reaction is higher than that of the carbon oxide. In the process of low temperature oxidation, the apparent activation energy of the H element is the least, the apparent activation energy of the N element is the largest, and the apparent activation energy of the O and S elements is negative, and the migration process of the C, H and N elements is endothermic reaction, and the conversion process of the O and S elements is an exothermic reaction. The content of C-H in the coal is gradually reduced in the coal temperature. The content of COOH in the coal is consistent with the general change trend of C = O, and when the temperature exceeds 120 鈩，

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