摘要
油品脱氯是石油炼制和加工过程中的关键环节,选择适宜的脱氯剂是该环节的核心要素。基于AC/Ca-Cu活性炭基脱氯剂静态吸附数据,采用Aspen Adsorption模拟研究了其动态吸附油品中HCl的过程。结果表明,该脱氯剂动态吸附至床层达到完全穿透状态的时间与静态吸附饱和时间基本一致,相对误差为2.5%;提高进料中HCl浓度或降低进料流速,有利于增大吸附床层的动态饱和吸附量,但会导致穿透起点提前。当传质系数大于等于0.1 s^(-1)时,其对吸附过程几乎无影响。随床层空隙率增大,床层穿透起点显著提前,生产时需频繁再生脱氯剂。当采用AC/Ca-Cu活性炭基脱氯剂时,在进料流速为4.0 m^(3)/h、进料浓度为0.001 mol/L、传质系数为0.1 s^(-1)、床层空隙率为0.4的条件下,从吸附开始至床层达到完全穿透状态的时间约为3.9 h。
Oil dechlorination is a key step in petroleum refining and processing,and the selection of appropriate dechlorinator is the core issue of this step.The dynamic adsorption process of HCl from oil was simulated using Aspen Adsorption on the basis of the static adsorption data of AC/Ca-Cu activated carbon-based dechlorinator.The results show that the time from the start of dynamic adsorption to complete breakthough for the dechlorinator is basically equal to the saturation duration of static adsorption,with a relative error of 2.5%.It is favorable for increasing the dynamic saturation adsorption capacity of the adsorption bed by increasing the HCl concentration in the feed or decreasing the feed flow-rate,but it will cause the breakthrough point to occur earlier.When the mass transfer coefficient is greater than or equal to 0.1 s^(-1),it has almost no effect on the adsorption process.With the increase of bed voidage,the starting point of bed breakthrough is significantly advanced,requiring frequent regeneration of the dechlorinator during production.Using the AC/Ca-Cu activated carbon-based dechlorinator with a feed flow rate of 4 m^(3)/h,a feed concentration of 0.001 mol/L,a mass transfer coefficient of 0.1 s^(-1),and a bed voidage of 0.4,the elapsed time from the start of adsorption until the bed layer reaches complete breakthrough is approximately 3.9 h.
作者
于长臻
吴永红
梁海涛
张兵
王同华
Yu Changzhen;Wu Yonghong;Liang Haitao;Zhang Bing;Wang Tonghua(School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang,Liaoning 111003;School of Chemical Engineering,Dalian University of Technology)
出处
《石油炼制与化工》
北大核心
2025年第12期67-73,共7页
Petroleum Processing and Petrochemicals
基金
辽宁省兴辽英才科技创新团队项目(XLYC2404028)
辽宁省自然科学基金项目(2021-MS-238)。
关键词
活性炭
吸附
脱氯剂
床层空隙率
传质系数
床层穿透起点
穿透持续时间
activated carbon
adsorption
dechlorinator
bed voidage
mass transfer coefficient
point of bed breakthrough
breakthrough duration
