两种形貌纳米Co_(3)O_(4)的表征及其对喹啉的吸附性能  

Characterization of Nanometer-Scale Co_(3)O_(4)With Two Morphologies and Its Absorption Performance for Quinoline

作　　者：王涵 唐克[1] 洪新[1] 房欣 秦悦 沈硕 李东娟[1] WANG Han;TANG Ke;HONG Xin;FANG Xin;QIN Yue;SHEN Shuo;LI Dongjuan(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001

出　　处：《石油学报(石油加工)》2025年第2期466-476,共11页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：2023年度省教育厅高等学校基本科研项目面上项目(JYTMS20230852);辽宁省教育厅基本科研项目揭榜挂帅服务地方项目(JYTMS20230835)基金资助。

摘　　要：Co_(3)O_(4)具有吸附位点丰富、稳定性强、易回收等特点,可用于吸附脱除柴油中的碱性含氮化合物。采用水热合成法,通过改变原料配比制备了2种Co_(3)O_(4)样品(样品1和样品2);采用XRD、FT-IR、SEM、N_(2)吸附-脱附等手段对2种样品进行表征;同时考察吸附温度、吸附时间、吸附剂用量对Co_(3)O_(4)吸附脱除模拟柴油中喹啉的影响;利用Material Studio软件建立Co_(3)O_(4)团簇吸附喹啉分子的模型,模拟计算吸附距离、吸附能及喹啉分子尺寸。结果表明:2种Co_(3)O_(4)样品均为立方尖晶石结构,样品1为纳米颗粒堆积且无规则堆放形成的球状团簇,样品2为纳米颗粒无规则堆积形成的纳米线形,样品1和样品2的平均孔径分别为21.34和16.13 nm,比表面积分别为30.08和14.42 m^(2)/g,孔体积分别为0.19和0.07 cm^(3)/g;当模拟燃料用量15 mL时,不同吸附温度下样品1的吸附脱氮效果明显优于样品2,且样品1的最佳吸附脱氮条件为:吸附温度30℃,吸附时间40 min,吸附剂用量0.6 g。Co_(3)O_(4)中Co^(2+)吸附效果优于Co 3+,2种价态Co对于喹啉配位吸附结构的稳定性与吸附能力均优于π络合吸附,这是由于喹啉分子尺寸为0.7160 nm×0.4998 nm,可以进入到Co_(3)O_(4)孔结构中。Co_(3)O_(4)has the characteristics of abundant adsorption sites,strong stability and easy recovery,which can be used to adsorb and remove basic nitrogen compounds from diesel.Two Co_(3)O_(4)samples(Sample 1 and Sample 2)were prepared using hydrothermal synthesis method by changing the ratio of raw materials.Further,these two samples were characterized by XRD,FT-IR,SEM and N_(2) adsorption-desorption.Meanwhile,the effects of adsorption temperature,adsorption time and adsorbent amount on the removal of quinoline from model diesel by Co_(3)O_(4)were investigated,the model for adsorption of quinoline molecules by Co_(3)O_(4)clusters was established using Material Studio software,and the adsorption distance,adsorption energy and molecular size of quinoline were simulated and calculated.The results show that the two Co_(3)O_(4)samples have cubic spinel structures,among which Sample 1 is a spheroidal cluster formed by random stacking of nanoparticles,and Sample 2 is a nanoline formed by random stacking of nanoparticles.For both samples,the average pore diameters are 21.34 and 16.13 nm,the specific surface areas are 30.08 and 14.42 m^(2)/g,and the pore volumes are 0.19 and 0.07 cm^(3)/g,respectively.When the simulated fuel dosage is 15 mL,the adsorption and denitrification effect of Sample 1 is significantly better than that of Sample 2 at different adsorption temperatures,and the optimal adsorption and denitrification conditions of Sample 1 are as follows:adsorption temperature 30℃,adsorption time 40 min,and adsorbent dosage 0.6 g.The adsorption effect of Co^(2+)in Co_(3)O_(4)is better than that of Co^(3+),and the coordination adsorption structure of the two valence Co for quinoline has better stability and adsorption capacity thanπ-complexation adsorption,which is because the molecular size of quinoline is 0.7160 nm×0.4998 nm,making it able to enter the pore structure of Co_(3)O_(4).

关 键 词：Co_(3)O_(4) 模拟柴油 喹啉 吸附 脱除率 Material Studio软件 

分 类 号：O647.3[理学—物理化学]