聚氯乙烯燃燒特性及HCl的生成機(jī)理

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摘要： 采用熱重法對(duì)聚氯乙烯(PVC)的燃燒過(guò)程進(jìn)行了研究，探討了聚氯乙烯燃燒特性，并由它們的微分熱重曲線計(jì)算出它們的反應(yīng)動(dòng)力學(xué)參數(shù)及對(duì)影響反應(yīng)常數(shù)的因素進(jìn)行了研究。同時(shí)，考察了恒速升溫和快速升溫過(guò)程HCl的生成特性。結(jié)果表明，PVC的燃燒機(jī)理是由三個(gè)過(guò)程決定的，可用三個(gè)一級(jí)反應(yīng)表示。PVC的燃燒過(guò)程的第一階段為脫氯階段。第二階段的活化能和指前因子明顯低于第一和第三階段。此階段為揮發(fā)分釋放階段。升溫速率的增加導(dǎo)致反應(yīng)開(kāi)始溫度、最大反應(yīng)速率以及HCl開(kāi)始釋放溫度的升高。 Abstract： The combustion characteristics of polyvinyl chloride (PVC) are investigated by means of thermogravimetry. The combustion activation energy and frequency factor are obtained by Doyle method. It was observed that PVC weight was reduced in three stages with exothermic reaction in its combustion. The first stage was caused by the chlorine removed from PVC. The volatile matter emission from PVC led to the second weight loss stage of PVC. The mechanism of PVC combustion can be expressed by three first-order kinetic equations. The beginning temperature of reaction, the max reaction rate and the temperature of HCl emission were increased with increasing heating rate. 作者：作者單位：期刊：燃料化學(xué)學(xué)報(bào) ISTICEIPKU Journal： JOURNAL OF FUEL CHEMISTRY AND TECHNOLOGY 年，卷(期)： 2000, 28(1) 分類(lèi)號(hào)： X705 關(guān)鍵詞： PVC 熱重法燃燒特性 Keywords： PVC thermogravimetry combustion characteristics

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燃燒的作文09-20