树脂基改性球形活性炭的汽油吸附脱硫性能研究  

STUDY ON GASOLINE ADSORPTIVE DESULFURIZATION OF RESIN-BASED MODIFIED SPHERICAL ACTIVATED CARBON

作　　者：范俊刚[1,2] 兰海叶 张志刚[1] 李文秀[1,2] 

机构地区：[1]沈阳化工大学辽宁省化工分离技术重点实验室,沈阳110142 [2]东北大学理学院

出　　处：《石油炼制与化工》2014年第9期10-15,共6页Petroleum Processing and Petrochemicals

基　　金：辽宁省自然科学基金项目(2013020080);辽宁省教育厅科学研究一般项目(L2013162)

摘　　要：使用D001型阳离子交换树脂为炭化前躯体,于Cu2+,Ni 2+,Fe3+的硝酸盐溶液中浸渍进行阳离子交换负载金属离子,N2气氛下焙烧炭化后利用CO2高温活化,制得负载金属的改性球形活性炭吸附剂。TG-DTG,XRD,SEM,BET等表征结果表明,树脂炭化制得的改性活性炭球形结构保持良好,孔体积及比表面积较大,负载金属构成选择性吸附活性位。利用噻吩的环己烷溶液作为模拟汽油考察改性球形活性炭的吸附脱硫性能,结果表明:负载金属种类对吸附容量的影响由强到弱的顺序依次为Fe>Ni>Cu,室温下噻吩的饱和吸附容量随温度升高而降低,一阶及二阶动力学方程均能较好地描述吸附传质过程,利用溶剂超声洗脱及热处理方式进行吸附剂再生,经3次再生后改性球形活性炭的噻吩吸附能力保持较好。Strong acidic polystyrene-based cation exchange resin （D001）was used as carbonization precursor to prepare metal-loaded modified spherical activated carbons （SACs）for fuel adsorptive desul-furization. The modification procedures included metal loading through metallic cation exchange in met-al-containg salt solutions （Cu2＋ ,Ni2＋ ,Fe3＋ nitrates）,carbonized by calcinations followed by activation with CO2. TG-DTG,XRD,SEM and BET characterizations show that after carbonization and modifica-tion the SACs remain the spherical shape having large pore volume and specific surface area. The metal-lic particle disperses over the carbonized surface as the activated centers for adsorptive desulfurization.The desulfurization capacities of SACs were investigated by model gasoline composed of thiophene dis-solved in cyclohexane. The results reveal that the effect of the type of metal loaded on adsorption capaci-ty was the order Fe〉Ni〉Cu. The adsorption capacity decreases with temperature rising from 20 ℃ to 60 ℃. The first-order and second-order kinetic equations both fit the adsorption mass transfer process well. The SACs can be regenerated by ultrasonic ethanol solvent elution and heat treatment. After 3 times regeneration,the reactivated carbon still has a good adsorption capability of thiophene.

关 键 词：球形活性炭 改性 负载金属 吸附脱硫 再生 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]