Ag/γ-Al_2O_3催化剂催化氧化深度脱硫及反应动力学模型探索  

DEEP OXIDATION DESULFURIZATION CATALYZED BY Ag/γ-Al_2O_3 CATALYST AND KINETICS MODEL EXPLORATION

作　　者：宋华[1] 白冰[1] 宋华林[2] 冯化林[1] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]牡丹江医学院医学影像学院

出　　处：《石油炼制与化工》2012年第8期33-37,共5页Petroleum Processing and Petrochemicals

基　　金：黑龙江省教育厅科学技术研究项目(11531012)资助

摘　　要：以噻吩/石油醚模拟油为原料、Ag/γ-Al2O3为催化剂、氧气为氧化剂,研究了催化氧化深度脱硫技术,对催化剂进行了X射线衍射(XRD)和低温氮吸附表征,并考察了催化剂用量、反应温度、反应时间和萃取条件对脱硫效果的影响。在噻吩/石油醚模拟油20 mL、Ag/γ-Al2O3催化剂0.12 g、氧化温度70℃的反应条件下,氧化50 min后,将得到的产物采用甲醇为萃取剂,在20℃、剂油体积比1∶1的条件下萃取30 min,脱硫率达到98.1%。反应动力学研究结果表明,噻吩氧化过程可用一级反应动力学方程式来表示,其表达式为:k=0.049 45 exp[-10 683.4/(RT)]。The deep catalytic oxidation desulfurization of model oil（thiophene/petroleum ether） was studied using Ag/γ-Al 2 O 3 as catalyst and gaseous oxygen as oxidant.The catalyst was characterized by X-ray diffraction（XRD） and low temperature N 2-adsorption techniques.The effects of catalyst amount,reaction temperature and time,as well as extraction conditions on the oxidation desulfurization were investigated.Test results showed that using 20 mL of model oil,0.12 g of catalyst,reacting at 70 ℃ for 50 min,the obtained material was extracted by methanol at 20 ℃ for 30 min with a solvent/oil volume ratio of 1,the rate of desulphurization reached 98.1%.The kinetic study indicates that catalytic oxidation of thiophene is a pseudo first-order reaction,which could be expressed as k = 0.049 45 × exp[-10 683.4/（RT） ].

关 键 词：氧气 氧化脱硫 噻吩 动力学模型 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]