摘要
采用差热-热重分析法对不同反应条件下的制药污泥热解特性及动力学规律展开研究。结果表明:制药污泥的热解过程经历失水、有机物分解和碳化3个阶段;制药污泥在不同升温速率(5、10和20℃/min)下的TG(热重分析)和DTG(TG的一次微分)曲线的趋势大致相同,但是随着升温速率的增加,TG和DTG曲线向高温区移动。通过FLynnWall-Ozawa法和atava-esták法对污泥主要反应阶段进行热解动力学分析,得出当转化率为0.9时,活化能最大为150.75 kJ/mol;当转化率为0.6时,活化能最小为68.93 k J/mol;污泥的热解反应在280~360℃时的活化能为85.67kJ/mol,最概然机理函数为[-ln(1-α)]~3;在640~700℃时的活化能150.42 kJ/mol,最概然机理函数为(1-α)^(-1)-1。
The temperature difference-thermogravimetric method was employed to study the pyrolytic characteristics and dynamic law of sludge under different reaction conditions. Results showed that the pharmacy sludge pyrolysis process contains three weight loss stages: loss of moisture,organic matter decomposition and carbonization. The TG and DTG curves under different heating rate( 5 ℃ / min,10 ℃ / min,and 20 ℃ / min) trend are roughly the same. But with the increase of heating rate,TG and DTG curve has a tendency to move to the high temperature area. FLynn-WallOzawa and atava-esták analysis method was used to explore pyrolysis kinetics of Pharmacy sludge main reaction stage. It was concluded that when the conversion rate is 0. 9,the activation energy wuuld be as highest as 150. 75k J / mol. When the conversion rate is 0. 6,The activation energy would be as lowest as 68. 93 kJ / mol. Within the range of 280 ~ 360 ℃ reaction,the activation energy of pharmacy sludge pyrolysis reaction is 85. 67 KJ / mol,with the most probable mechanism function of [- ln( 1- α) ]~3. In 640 ~ 700 ℃ reaction range,the activation energy of pharmacy sludge is 150. 42 KJ / mol,and the most probable mechanism function is( 1- α^(-1))- 1
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第10期90-95,128-129,共6页
Journal of Engineering for Thermal Energy and Power
基金
河北省高等学校科学技术研究优秀青年基金资助项目(Y2011107)
关键词
制药污泥
热重分析
活化能
最概然机理函数
pharmacy sludge
thermogravimetric analysis
activation energy
most probable mechanism function
