本文選題：活化能 + 紅外光譜�。� 參考：《煤炭科學(xué)技術(shù)》2015年06期

【摘要】：為了鑒定玉華長焰煤、安山不黏煤和華豐氣肥煤這3種不同變質(zhì)程度煤樣的自燃傾向性,利用程序升溫試驗,建立了耗氧速率與煤體溫度之間的阿倫尼烏斯公式并對其進(jìn)行對數(shù)處理得到活化能方程,分析該方程的線性回歸直線斜率并計算出煤樣低溫氧化表觀活化能,再采用傅里葉變換紅外光譜儀對煤樣的表面分子結(jié)構(gòu)進(jìn)行了分析,揭示了不同變質(zhì)煤樣自燃傾向性差異的原因。結(jié)果表明:在3種試驗煤樣中,隨著變質(zhì)程度的加深,表觀活化能呈現(xiàn)出逐漸增大的趨勢,自燃傾向性降低;隨著變質(zhì)程度的加深,煤樣表面分子結(jié)構(gòu)中有利于自燃的基團減少,不利于自燃的基團增大,導(dǎo)致自燃傾向性逐漸降低。
[Abstract]:In order to identify the spontaneous combustion tendency of Yuhua long flame coal, Anshan non-caking coal and Huafeng gas fat coal, the temperature programmed test was used to test the spontaneous combustion tendency of three kinds of coal samples with different metamorphic degrees. The Arrhenius formula between oxygen consumption rate and coal temperature was established, and the activation energy equation was obtained by logarithmic treatment. The linear regression linear slope of the equation was analyzed and the apparent activation energy of low temperature oxidation of coal sample was calculated. The surface molecular structure of coal samples was analyzed by Fourier transform infrared spectroscopy (FTIR), and the reasons for the difference of spontaneous combustion tendency of different metamorphic coal samples were revealed. The results show that with the deepening of metamorphism, the apparent activation energy increases gradually, and the tendency of spontaneous combustion decreases with the deepening of metamorphism. In the molecular structure of coal sample surface, the group which is favorable to spontaneous combustion is reduced, which is not conducive to the increase of the group of spontaneous combustion, which leads to the gradual decrease of spontaneous combustion tendency.
【作者單位】： 西部礦井開采與災(zāi)害防治教育部重點實驗室;西安科技大學(xué)能源學(xué)院;
【基金】：陜西省重點科技創(chuàng)新團隊資助項目(2012KCT-09) 國家自然科學(xué)基金資助項目(51134019,51404192)
【分類號】：TD75

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本文編號：1866766