有序介孔碳对低浓度气相萘的吸附特性分析

发布时间：2018-01-11 01:14

本文关键词：有序介孔碳对低浓度气相萘的吸附特性分析　出处：《化工学报》2017年08期 　论文类型：期刊论文

【摘要】：对3种常见有序介孔碳(OMCs)吸附脱除典型气相多环芳烃——萘进行了研究。分别采用吸附等温线模型(Langmuir、Freundlich、Sips)和恒定浓度波动力学模型对吸附等温线和穿透曲进行拟合分析。采用程序升温脱附法通过失重曲线分析了吸附剂的再生性能。结果表明:Langmuir模型和Sips模型能很好地描述低浓度气相萘在OMCs上的静态吸附行为(R~299%),吸附量呈CMK-5CMK-3FDU-15排列。恒定浓度波动力学模型具有较高的拟合度,介孔促使3种吸附剂对萘分子具有较高的吸附扩散系数。具有微通孔结构的CMK-5和FDU-15表现出更好的再生性能。综合吸脱附动力学分析,CMK-5在3种吸附剂中表现出更好的应用潜能。
[Abstract]:The adsorption and removal of typical gas phase polycyclic aromatic hydrocarbons (PAHs) by three common ordered mesoporous carbon monomers (OMCs) were studied. The adsorption isotherm model Langmuirn Freundlich was used respectively. Sips). The adsorption isotherm and the penetration curve were fitted and analyzed by the dynamic model of constant concentration fluctuation. The regeneration performance of the adsorbent was analyzed by the weight loss curve by the temperature programmed desorption method. The results showed that: 1. Langmuir model and Sips model can describe the static adsorption behavior of naphthalene on OMCs with low concentration. ). The adsorption capacity was arranged in CMK-5CMK-3FDU-15 arrangement and the mechanical model of constant concentration fluctuation had higher fitting degree. The mesoporous adsorbents have higher adsorption and diffusion coefficients for naphthalene molecules and better regeneration properties for CMK-5 and FDU-15 with microporous structure. CMK-5 showed better application potential in three kinds of adsorbents.
【作者单位】：北京科技大学能源与环境工程学院;北京科技大学北京高校节能与环保工程研究中心;
【基金】：国家自然科学基金项目(51478083)~~
【分类号】：O647.3;X701
【正文快照】： 引言多环芳烃是由两个及以上苯环(或具有和苯环相同结构的五元环)以稠环形式相连的有机化合物的总称[1],是一类环境中广泛存在的具有致癌性和致畸性的持久性有机污染物,占所有致癌物质的1/3以上[2-3]。随着现代化的发展,城市工业化程度不断提高,石油、煤炭等化石燃料使用率逐

【参考文献】