微界面强化柴油加氢脱硫过程的模拟计算研究  

Simulation study on micro-interface intensified diesel hydrodesulfurization process

作　　者：吴梦思 田洪舟[1,2] 丁方园 张宇杰 李磊 张志炳[1,2] Wu Mengsi;Tian Hongzhou;Ding Fangyuan;Zhang Yujie;Li Lei;Zhang Zhibing(School of Chemistry and Chemical Engineering,Nanjing University,Nanjing,210023,China;Nanjing Institute of Microinterface Technology Co.,LTD,Nanjing,211500,China)

机构地区：[1]南京大学化学化工学院,南京210023 [2]南京延长反应技术研究院有限公司,南京211500

出　　处：《南京大学学报（自然科学版）》2022年第4期706-712,共7页Journal of Nanjing University（Natural Science）

基　　金：江苏省创新能力建设计划-学科重点实验室建设项目(BM2018007)。

摘　　要：出于对环境污染问题的关注与提高国六柴油等产品质量的要求,降低油品中硫含量一直以来广受关注.目前应用广泛的柴油脱硫技术主要是固定床催化加氢技术,为达到深度脱硫要求,传统工艺常采用升温加压、增大氢油比或油品循环等操作方式,导致设备投资高昂、工艺要求严苛和运行费用偏高.为了探究微界面反应强化技术对柴油加氢脱硫过程的强化效果,以固定床鼓泡反应器为例,构建微界面体系的构效数学调控模型,模拟计算并分析气泡尺度对柴油加氢脱硫效率的影响.理论计算表明,在工况条件(温度为350℃,压力为3.6 MPa,液时空速为3.0 h^(-1),氢油比为260 Nm^(3)·m^(-3))下,当气泡Sauter平均直径由5.0 mm减小至0.50 mm时,气-液-固微界面体系的体积传质系数增加约29倍,产品硫浓度从17.57μg·g^(-1)降至2.18μg·g^(-1),脱硫效果大幅度提高.这样的微界面加氢技术更容易实现国六柴油对硫含量不大于10μg·g^(-1)的质量要求.Due to the concern of environmental pollution and the requirement of improving the quality of NationalⅥdiesel and other products,reducing the sulfur content in oil products has been widely concerned.Fixed bed catalytic hydrogenation is a widely used desulphurization technology at present.In order to meet the requirements of deep desulfurization,the traditional process often adopts operation with high temperatures and high pressures,increasing hydrogen-oil ratio or oil circulation,which leads to higher equipment investment,harsher process requirements and more operating costs.In order to explore the enhancement effect of micro-interface reaction enhancement technology on diesel hydrodesulfurization process,the fixed bed bubble reactor was taken as an example in this paper to construct a mathematical model of the micro-interface system,simulate and analyze the influence of bubble size on diesel hydrodesulfurization efficiency.Theoretical calculation results showed that under the operating conditions(T=350℃,p=3.6 MPa,LHSV=3.0 h^(-1),hydrogen-oil ratio=260 Nm^(3)·m^(-3)),when the bubble Sauter mean diameter d_(32) decreased from 5.0 mm to 0.50 mm,the volumetric mass transfer coefficient of gas-liquid-solid micro-interface system increased about 29 times,and the sulfur content in oil products decreased from 17.57μg·g^(-1)to 2.18μg·g^(-1)accordingly,which indicated that the desulfurization effect was improved.Thus,it is much easier to meet the quality requirement of sulfur content not more than 10μg·g^(-1)for NationalⅥdiesel with the micro interface hydrogenation technology.

关 键 词：微界面反应强化技术 柴油加氢脱硫精制 上行式固定床反应器 构效调控模型 模拟计算 

分 类 号：TQ03-3[化学工程]