拟绝热条件下超高交联树脂动态吸附烷烃蒸汽特性及其预测  

Dynamic Adsorption Characteristics and Prediction of Alkane Vapors on Hypercrosslinked Polymeric Resin under Quasi Adiabatic Conditions

作　　者：王婧 吴剑[1] 龙超[1] WANG Jing;WU Jian;LONG Chao(State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210023

出　　处：《离子交换与吸附》2023年第5期419-430,共12页Ion Exchange and Adsorption

基　　金：江苏省重点研发计划社会发展项目(BE2022838)。

摘　　要：采用基于多元线性回归(Multiple Linear Regression,MLR)的D-R方程对超高交联吸附树脂HY-1吸附正戊烷、正己烷和正庚烷三种烷烃的等温吸附平衡量进行了预测,预测值与实际值相对误差在10%之内,证明该模型准确可靠;进一步耦合质量、热量守恒方程和线性驱动力传质方程(LDF)建立了固定床拟绝热条件下的吸附预测模型,对吸附三种烷烃的床层温升及穿透曲线进行了预测,预测结果与实验值的相对误差保持在20%以内;最后对该预测模型参数灵敏度进行了分析,结果表明影响三种烷烃吸附最大温升和穿透时间的模型参数主要有初始温度T_(0)、空床气速U、初始浓度C_(0)和床层高度L,敏感度大小顺序为:T_(0)>U>C_(0)>L,T_(0)为该模型中最敏感参数。The D-R equation based on Multiple Linear Regression(MLR)was used to predict the equilibrium adsorption capacities of n-pentane,n-hexane,and n-heptane on hypercrosslinked polymeric resin(HY-1).The relative error between the predicted and experimental values was within 10%,proving the accuracy and reliability of D-R equation based on MLR.By coupling the obtained D-R equations with mass balance,heat balance,and linear driving force mass transfer equation(LDF),a prediction model was established for fixed-bed adsorption under quasi adiabatic conditions.The bed temperature rise and breakthrough adsorption time of three alkanes on HY-1 were predicted,and the relative error between the predicted and experimental values was kept within 20%.Finally,the sensitivity of model parameters on predicting the bed temperature rise and breakthrough adsorption time was analyzed.The results showed that the sensitive parameters of this model included initial temperature T_(0),gas flowrate U,inlet concentration C_(0),and colunm length L,and followed the order:T_(0)>U>C>L,with T_(0)being the most sensitive parameter in the model.

关 键 词：超高交联吸附树脂 拟绝热 吸附穿透 床层温升 

分 类 号：X511[环境科学与工程—环境工程]