化工进展2023，Vol.42Issue(11)：6053-6063,11.DOI:10.16085/j.issn.1000-6613.2022-2362
乙醇改性钙基脱氯剂实验及动力学分析
Experimental and kinetics analysis of ethanol-hydrated calcium-based adsorbents
摘要
Abstract
An efficient HCl removal adsorbent was obtained by hydrating pure calcium oxide with ethanol solution.The adsorption performance on HCl at different reaction temperatures and initial HCl concentrations was investigated in a fixed bed reactor.The experimental data were fitted and analyzed using four reaction kinetic models.The results showed that the adsorbent surface of CA-ET-33 indicated a porous and large specific surface area structure due to the covering and dynamic deposition process of the ethanol organic molecules,while greatly increasing the 2-10nm pore occupancy ratio,which promoted its adsorption of HCl.The apparent reaction kinetic models fit the experimental results in the following order from best to worst:pseudo-second-order kinetic model,Elovich model,pseudo-first-order kinetic model and intra-particle diffusion model.The pseudo-second-order kinetic model can describe the actual adsorption behavior of the adsorbent,showing the adsorption was mainly chemisorption-based.The elevation of temperature provided sufficient activation energy for chemisorption,and the rise of initial HCl concentration enhanced the driving force of the mass transfer from the gas phase to the adsorbent surface.The cumulative adsorption capacity ascended with the addition of temperature,and the increase of HCl initial concentration shortened the period to reach the equilibrium.A general kinetic equation was determined that can predict the adsorption process of HCl of a Ca-based adsorbent.关键词
乙醇消化/钙基脱氯剂/反应动力学模型/吸附模型预测Key words
ethanol hydration/calcium-based adsorbent/reaction kinetic models/adsorption model prediction分类
资源环境引用本文复制引用
王雨晴,段钰锋,王睿,刘晓硕,申镇..乙醇改性钙基脱氯剂实验及动力学分析[J].化工进展,2023,42(11):6053-6063,11.基金项目
国家自然科学基金(51876039). （51876039）
