摘要
利用TG-FTIR对制革污泥的燃烧特性和燃烧过程气体释放情况进行了研究。研究发现,制革污泥挥发分和灰分含量较高,固定碳含量低、热值低。不同升温速率下,制革污泥的燃烧在800℃时已经比较充分,随着升温速率的增加,制革污泥碳燃烧的失重速率和峰值温度有所增加。运用Ozawa法进行活化能计算表明,制革污泥燃烧所需活化能随着反应程度的深入而增加。制革污泥的挥发分燃烧阶段符合三维扩散的Z-L-T方程反应模型,固定碳燃烧阶段符合自催化反应的P-T方程反应模型,且制革污泥在不同升温速率下燃烧动力学参数存在动力学补偿效应。TG-FTIR分析表明,不同升温速率对气体析出基本特征没有影响,在低温阶段,制革污泥的燃烧产物中有少量的有机酸组分析出。
The combustion and emission characteristics of tannery sludge at different heating rates were investigated by using thermogravimetric analysis-Fourier transform infrared spectrometer （TG-FTIR）.It was found that the original tannery sludge contained high contents of volatile mater and ash while low content of fixed carbon,and had a low calorific value.The combustion of combustible matter in tannery sludge almost finished before 800℃.The Ozawa method was used to analyze the activation energy of tannery sludge combustion,and it was found that the activation energy in the tannery sludge combustion process increased with the extent of combustion reaction.The combustion of volatile matter in tannery sludge followed the three-dimensional diffusion model and Z-L-T equation was the most probable kinetic function,and the combustion of fixed carbon followed the self-catalyzed reaction and P-T equation was the most probable kinetic function.It was found that kinetic compensation relationship existed between combustion activation energy and pre-exponential factor at different heating rates.Some organic gaseous product emitted at the low temperature stage during tannery combustion.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2010年第5期1301-1306,共6页
CIESC Journal
基金
国家高技术研究发展计划重点项目(2007AA061302
2007AA06Z336 )
浙江省重大科技专项(2007C13084)
浙江省自然科学基金项目(X506312
R107532)
浙江省科技计划项目(2008C23090)
教育部新世纪优秀人才支持计划(NCET-05-0524)~~
关键词
制革污泥
热重-红外联用
燃烧
动力学特性
活化能
tannery sludge
thermogravimetric analysis-Fourier transform infrared spectrometer
combustion
kinetic characteristics
activation energy
