Cu-BTC吸附剂对模拟油中有机氯化物的脱除性能

摘要/Abstract

摘要： 采用水热合成法制备了苯-1,3,5-三甲酸铜（Cu-BTC）吸附剂，利用X射线衍射、扫描电镜、N2吸附-脱附和热重分析等手段对其进行表征；通过静态吸附法用Cu-BTC吸附脱除模拟油中的3-氯-2-甲基-1-丙烯（A）、1,4-二氯丁烷（B）、3-氯-2-甲基苯胺（C）和5-氯-2-甲基苯胺（D），考察吸附时间、吸附温度、剂油质量比、有机氯化物初始质量浓度对氯化物脱除效果的影响，优选吸附条件，并采用Langmuir，Freundlich，Temkin，D-R吸附等温方程拟合吸附数据，研究Cu-BTC对有机氯化物的吸附机理。结果表明：Cu-BTC对有机氯化物优选的吸附时间为240 min，吸附温度为303.15 K，剂油质量比为1:40，且吸附剂的再生性能好；Langmuir吸附等温方程更适合描述Cu-BTC对有机氯化物的吸附过程，Cu-BTC对A，B，C，D的最大吸附量分别为11.90，5.21，23.81，47.62 mg/g；吸附剂具有较好的吸附选择性，易于吸附含有不饱和键的有机氯化物。

关键词: 吸附, 有机氯化物, Cu-BTC, 氯化物脱除率, 模拟油

Abstract: The copper benzene-1,3,5-tricarboxylate (Cu-BTC) adsorbent was prepared by hydrothermal method and characterized by XRD, SEM, N2 adsorption-desorption and TG techneques. 3-chloro-2-methyl-1-propene(A), 1,4-dichlorobutane(B), 3-chloro-2-methylaniline(C)and 5-chloro-2-methylaniline(D) in simulated oil were removed by static adsorption method. The effects of adsorption time, adsorption temperature, mass ratio of solvent to oil and initial concentration of organic chlorides on the adsorption effect were investigated, and the adsorption conditions were optimized. The results showed that the optimal adsorption conditions were as follows: an adsorption time of 240 min,an adsorption temperature of 303.15 K, a mass ratio of adsorbent to oil equal to 1:40. The Langmuir, Freundlich, Temkin and D-R adsorption isotherms were used to fit the adsorption data, the Langmuir adsorption isotherms was more suitable to describe the adsorption data, and the maximum adsorption capacities for A,B,C and D were 11.90, 5.21, 23.81 and 47.62 mg/g, respectively. The adsorbent has good adsorption selectivity and is easy to adsorb organic chlorides with unsaturation bond.

Key words: adsorption, organic chlorides, Cu-BTC, chloride removal rate, simulated oil

李瑞丽王国江张东媛张红娟. Cu-BTC吸附剂对模拟油中有机氯化物的脱除性能[J]. 石油炼制与化工, 2021, 52(8): 56-63.

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