基于红外光谱研究沥青燃烧机理和有害气体成分分析

利用Rosemount气体分析仪和定碳炉搭建起固定床燃烧反应试验平台，通过红外光谱分析技术定量分析沥青及其胶浆在高升温速率条件下燃烧反应的有毒气态产物成分、及其释放规律。研究表明，在高升温速率、近等温条件下，沥青及胶浆的燃烧过程可近似分为活泼挥发组分析出燃烧、二次挥发析出结合残炭燃烧两个阶段，其主要气态产物为CO₂，CO，NO，NO₂及SO₂。沥青材料中活泼挥发组分含量是影响燃烧气态产物释放规律的关键因素之一，减少沥青材料中活泼挥发组分的含量可有效降低燃烧气态产物的生成、尤其是CO的产生。

Research on the Combustion Mechanism of Asphalt and the Composition of Harmful Gas Based on Infrared Spectral Analysis

By using the Rosemount gas analyzer and the test platform of fixed bed built by carbon furnace,the harmful gaseous compositions and the release rules of asphalt and mortar under high temperature rate were analyzed quantitatively based on infrared spectral analysis technology.The results indicated that the combustion process of the asphalt and mortar can be approximately divided into two stages stage of primary volatile combustion,and stage of secondary volatile release combined with fixed carbon combustion in isothermal condition with high heating rate.The major gaseous products are CO2,CO,NO,NO2 and SO2.the volatile content is one of the key factors affecting the release rules of gaseous combustion products in asphalt,and reducing the volatile content in asphalt materials can effectively reduce the generation of gaseous combustion products,especially CO.