制药污泥与花生壳混合热解非等温动力学分析  

Non-isothermal pyrolysis kinetic analysis of pharmaceutical sludge and peanut shell

作　　者：杨凯[1,2] 高朋博 孙宏强 肖立春[3] YANG Kai;GAO Pengbo;SUN Hongqiang;XIAO Lichun(College of Mechanical and Electrical Engineering,Shijiazhuang University,Shijiazhuang 050035,China;Shijiazhuang Digital Medical Rehabilitation Technology Innovation Center,Shijiazhuang 050035,China;College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066000,Hebei,China)

机构地区：[1]石家庄学院机电学院,石家庄050035 [2]石家庄市数字医疗康复技术创新中心,石家庄050035 [3]燕山大学环境与化学工程学院,河北秦皇岛066000

出　　处：《安全与环境学报》2023年第12期4507-4514,共8页Journal of Safety and Environment

基　　金：河北省科技计划项目(16C1303351005);河北省重点研发计划项目(21327213D);河北省高等学校科学研究项目(Z2020106)。

摘　　要：为探究制药污泥(Pharmaceutical Sludge,PhS)与生物质协同热解处置机理,基于非等温法对制药污泥、花生壳(Peanut Shell,PS)及其混合物的热解特性进行试验研究,采用3种无模型法(Flynn-Wall-Ozawa法、Kissinger-Akahira-Sunose法和Starink法)确定样本热解平均表观活化能,并结合主曲线法与CR(Coats-Redfern)最小二乘拟合法对热解机理函数进行研究。结果显示:PS主要有机成分为木质素、纤维素、半纤维素等,PhS主要有机成分为蛋白质、脂肪类及多糖等化合物;除脱水过程外,PS主要为中低温分解,而PhS在中低温和高温均有较明显失重峰,且二者混合热解时随混合质量比不同会出现轻微的协同和抑制效应;中温热解区PS反应活性比PhS略强,此阶段PS和PhS的平均活化能分别为180.3 kJ/mol和194.0 kJ/mol,二者热解机理均属于随机成核和随后生长机理,PS机理函数符合AE2.5方程,PhS则与AE3方程契合度更高;PhS在高温分解区域平均活化能为249.6 kJ/mol,热解机理属于随机成核和随后生长机理,适用于A1.5方程。研究表明PS添加质量分数对PhS热解过程影响较小,且其动力学参数与模型有一定相似性。试验结果可为热解温度、时间、比例等工艺优化参数提供一定理论支撑。To explore the synergistic pyrolysis mechanism of pharmaceutical sludge and biomass,the pyrolysis characteristics of pharmaceutical sludge(PhS),peanut shell(PS),and their blends were experimentally studied based on a non-isothermal method.Samples were tested at different heating rates using a thermogravimetric analyzer,and the surface functional groups were analyzed by a FT-IR spectroscopy.Three model-free methods(Flynn-Wall-Ozawa method,Kissinger-Akahira-Sunose method,and Starink method) were adopted to determine the apparent activation energy;the pyrolysis mechanism functions were inferred based on the master plots method and the CR least square fitting algorithm.Results show that:the main organic components of PS are lignin,cellulose,and hemicellulose,etc.,while PhS contains organic compounds such as proteins,lipids and polysaccharides,etc.Except for the dehydration stage,PS is mainly decomposed at medium and low-temperature ranges,but PhS has obvious weight loss peaks in medium-temperature and high-temperature ranges.Slight synergistic and inhibitory effects will occur with different mixing ratios.During medium temperature ranges,the reaction activity of PS is stronger than that of PhS;and the average activation energy of PS and PhS are 180.3 kJ/mol and 194.0 kJ/mol,respectively.Meanwhile,the pyrolysis mechanism belongs to Random Nucleation and Subsequent Growth,The mechanism function of PS conforms to AE2.5 equation,while the function of PhS is more consistent with AE3 equation.During high-temperature ranges,the average activation energy of PhS is 249.6 kJ/mol,and the pyrolysis mechanism belongs to Random Nucleation and Subsequent Growth,which is suitable for A1.5 equation.Therefore,the addition of PS has limited influence on the pyrolysis process of PhS,and their apparent activation energy and pyrolysis mechanism functions are highly similar to each other.Research results can provide some theoretical support for the optimization of pyrolysis process parameters in terms of temperature,time,proportion,etc.

关 键 词：环境工程学 制药污泥 花生壳 热解 主曲线法 

分 类 号：X705[环境科学与工程—环境工程]