脱除苯中二硫化碳吸附剂的制备及其吸附性能  

Preparation and adsorption performance of adsorbents for removing carbon disulfide from benzene

作　　者：仇玉静 刘畅 罗国华[1,2] 董森 李建华 QIU Yujing;LIU Chang;LUO Guohua;DONG Sen;LI Jianhua(Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology,Beijing 102617,China;Kailuan Coal Chemical R&D Center,Tangshan 063611,Hebei,China)

机构地区：[1]北京石油化工学院,北京102617 [2]燃料清洁化及高效催化减排技术北京市重点实验室,北京102617 [3]开滦煤化工研究中心,河北唐山063611

出　　处：《化工进展》2025年第4期2374-2382,共9页Chemical Industry and Engineering Progress

基　　金：北京市属高校高水平教师队伍建设支持计划-高水平创新团队建设计划(IDHT20180508)。

摘　　要：采用氯甲基聚苯乙烯大孔树脂(D201)作为接枝载体,通过接枝有机胺类物质制得胺化改性的树脂脱硫吸附剂,并用于脱除苯中微量CS_2;对有机胺类型、洗涤方式、树脂与有机胺质量比等制备条件以及吸附温度、吸附空速、原料CS_(2)浓度等工艺条件对吸附剂吸附性能的影响进行了考察;采用BET、有机元素分析仪、傅里叶变换红外光谱(FTIR)对吸附剂进行了表征,并对吸附机理进行了分析。研究表明:胺化改性树脂的吸附过程是通过表面伯胺及仲胺基官能团与CS_(2)反应生成硫代酸,硫代酸不稳定分解生成异硫酸氰酯,继而生成硫脲而被选择吸附下来。在吸附温度为45℃、常压、体积空速为1h^(-1)、进料CS_(2)浓度为2000mg/L的条件下,采用D201接枝乙二胺制得的D201-EDA吸附剂的穿透吸附容量和饱和吸附容量分别高达183.33mg/g和200.78mg/g。Resin desulfurization adsorbent was prepared by grafting organic amines on chloromethyl polystyrene macroporous resin(D201)for removing trace CS_(2) in benzene.Effects of preparation method including amine type,washing method and mass ratio of resin to amine on the adsorption performance were studied.Besides,relations between performance and absorption conditions such as temperature,space velocity and CS_(2) concentration of raw material were also investigated.Adsorption mechanism of the absorbent was revealed by the results from BET,organic element analyzer and Fourier transform infrared spectroscopy(FTIR).It was shown that thioic acid was initially generated by CS_(2) and primary-amine and secondary-amine functional groups on the absorbent.Then,it converted to cyanide isosulfate and finally to thiourea as thioic acid was unstable.As a result,trace CS_(2) in benzene was removed.The D201-EDA adsorbent prepared by grafting ethylenediamine on D201 exhibited excellent penetration adsorption capacity and saturated adsorption capacity of 183.33mg/g and 200.78mg/g,respectively, when it conducted at 45℃ under atmospheric pressure with volume space velocity of 1h^(−1) and feed CS_(2) concentration of 2000mg/L.

关 键 词：聚苯乙烯树脂 有机胺 脱硫吸附剂 苯 二硫化碳 

分 类 号：TQ424[化学工程]