石油化工2025，Vol.54Issue(6)：763-770,8.DOI:10.3969/j.issn.1000-8144.2025.06.002
FCC过程中V的钝化机理及其对催化剂抗V污染性能的影响
Passivation mechanism of V passivation in FCC process and its influence on the catalyst anti-V pollution performance
摘要
Abstract
A metal capturing catalyst Cat-VT was prepared using MgO,activated Al2O3,and La(NO3)3 as raw materials by spray drying method in FCC process.Vanadium contamination was introduced through an impregnation method.The effects of the anti-vanadium component on catalyst performance were investigated using XRD,XPS,H2-TPR,TG,DSC,and EDX-Mapping techniques.Experimental results indicate that the addition of the metal passivation additive Cat-VT leads to the formation of stable and high-melting-point compounds between vanadium and MgO/La2O3 under high-temperature hydrothermal conditions,thereby suppressing vanadium mobility.Vanadium is effectively transferred and captured between catalyst particles and anti-vanadium additive particles.Catalyst performance evaluations show that under the same level of vanadium contamination,the addition of Cat-VT increases the reaction conversion rate of the catalyst from 75.1％to 81.9％and 80.5％,while the coke yield decreases from 11.0％to 10.2％and 9.8％,with the catalyst demonstrating excellent resistance to vanadium contamination.关键词
流体催化裂化/金属污染/氧化镁/稀土/钒Key words
fluid catalytic cracking/metal contamination/magnesium oxide/rare earth/vanadium分类
化学工程引用本文复制引用
刘涛,王刚,杜晓辉,高雄厚..FCC过程中V的钝化机理及其对催化剂抗V污染性能的影响[J].石油化工,2025,54(6):763-770,8.基金项目
中国石油天然气集团公司资助项目(2023ZZ36). （2023ZZ36）
