文献类型：期刊文献

英文题名：Migration and emission characteristics of metal pollutants in fluid catalytic cracking (FCC) process

作者：Bian, Jiawei[1];Wang, Bohan[2];Niu, Ximing[3];Zhao, Hai[1];Ling, Hao[1];Ju, Feng[1,4]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[3]Shanghai Res Inst Chem Ind CO LTD, Shanghai 200333, Peoples R China;[4]Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis, Utrecht, Netherlands

年份：2024

卷号：462

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20234214903893);WOS:【SCI-EXPANDED(收录号:WOS:001097237400001)】；

基金：This work was supported by the National Natural Science Foundation of China (22378131) .

语种：英文

外文关键词：Fluid catalytic cracking; Metal pollutants; Migration rate; Metal distribution; Emission factor

摘要：Fluid catalytic cracking (FCC) is the core unit for heavy oil conversion in refineries. In the FCC process, the metal contaminants from the feedstock are deposited on the catalysts, causing catalyst deactivation and metal particulate matter (PM) emission. However, the migration and emission characteristics of metal pollutants in FCC units are still unclear. Here, the stack tests of three FCC units were carried out to monitor metal PM emissions, and the metal contents of the feedstock oil and spent catalyst were detected. For the metal migration from the feedstock to the catalysts, Ni, Fe, and V have high concentrations and migration rates while other metals perform much lower. The metal distribution on the spent catalysts profoundly determines the metal mobility to the flue gas and the regeneration process affects the catalyst attrition, leading to metal PM emissions discrepancy. The migration rate and emission concentration of V in the deeper layers of the catalysts are much lower than those of Ni at the particle's exterior. Finally, the stack data was used to calculate the emission factors and ratio factors of the metal PM. This work is expected to advance metal migration cognition and metal pollutants emissions estimation in FCC units.