摘要
采用热重分析法研究厨余垃圾及其水热炭的燃烧特性与反应动力学。对比分析厨余垃圾及其水热炭在3种不同升温速率(10、20、40℃/min)下的燃烧特性,分别采用KAS(Kissiger-Akahira-Sunose)法和FWO(Flynn-Wall-Ozawa)法计算燃烧过程中反应动力学参数。结果表明:20℃/min升温速率下,厨余垃圾与水热炭呈现不同的燃烧特性,厨余垃圾微分热重(DTG)曲线呈明显的双峰结构,而随着炭化温度的升高,水热炭DTG曲线第1个峰逐渐变缓,最后消失。随着升温速率的增大,各样品DTG曲线整体向高温侧偏移,着火温度和燃尽温度升高,燃烧特性指数增大。KAS法和FWO法求得的各样品燃烧活化能均具有相似变化趋势,因挥发分含量减少及固定碳含量增加,厨余水热炭热值增大,燃烧过程中平均活化能高于厨余垃圾。
The combustion characteristics and reaction kinetics of food waste and its hydrochars are studied by thermogravimetric analysis method.The combustion characteristics of food waste and its hydrochars under three different heating rates(10,20 and 40℃/min)are compared and analyzed,KAS(Kissiger-Akahira-Sunose)and FWO(Flynn-WallOzawa)methods are used to calculate the reaction kinetic parameters during combustion.The results show that different combustion characteristics of food waste and its hydrochars were observed at the heating rate of 20℃/min.The differential thermogravimetric(DTG)curve of the food waste presents double-peak structure while the first peak of hydrochar DTG curve become smaller until disappeared with the increase of the carbonization temperature.With the increase of heating rate,the DTG curves of each sample shifts towards the high temperature zone.At the same time,the ignition temperature,burnout temperature and the combustion characteristic index increase,too.A similar tendency of the combustion activation energy determined by KAS and FWO methods is observed.The heating value of hydrochars increase and the average activation energy during combustion is higher than that of kitchen waste due to the decrease of volatile content and the increase of fixed carbon content.
作者
张学飞
邢献军
糜梦星
李永玲
马培勇
Zhang Xuefei;Xing Xianjun;Mi Mengxing;Li Yongling;Ma Peiyong(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China;Advanced Energy Technology and Equipment Research Institute,Hefei University of Technology,Hefei 230009,China;School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;Inelligent Manufacturing Institute,Hefei University of Technology,Hefei 230009,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第6期128-135,共8页
Acta Energiae Solaris Sinica
基金
北京市教育委员会市属高校创新能力提升计划(J2014QTXM0204)
安徽省科技计划(2013AKKG0398)
安徽省重点研究与开发计划(1704a07020087)。
关键词
燃烧
动力学
炭化
活化能
KAS法
FWO法
厨余垃圾
combustion
kinetics
carbonization
activation energy
KAS method
FWO methods
food waste
作者简介
通信作者:邢献军(1964-),男,博士、教授,博士生导师,主要从事高效清洁燃烧及能源转化利用方面研究。xxianjun@hfut.edu.cn。
