低碳化学与化工2025，Vol.50Issue(4)：71-79,9.DOI:10.12434/j.issn.2097-2547.20240231
NiO含量对NiMo/Al2O3催化剂在焦炉煤气中噻吩加氢脱硫性能的影响
Effect of NiO content on thiophene hydrodesulfurization performance of NiMo/Al2O3 catalyst in coke oven gas
摘要
Abstract
Coke oven gas,as a valuable gaseous resource,is often used as a chemical raw material.However,sulfur impurities such as thiophene(C4H4S)in the gas exhibit strong poisoning effects on catalysts.Industrially,deep removal of thiophene is typically achieved via secondary Ni-Mo hydrodesulfurization.To investigate the effect of metal loading on catalyst performance,NiMo/Al2O3 catalysts with varying NiO contents(5％,10％,15％and 20％,mass fraction)were prepared using the impregnation method.The hydrodesulfurization performance of these catalysts in coke oven gas was tested under conditions of reaction temperatures from 250 ℃to 390 ℃,the pressure of 1 MPa,and the gas hourly space velocity of 4500 h-1.The effects of NiO content on the catalyst performance were analyzed using characterization techniques such as N2 adsorption/desorption,XRD,H2-TPR,and XPS.The results show that in the temperature range of 270 ℃ to 370 ℃,the C4H4S conversion rates of the catalysts decrease in the order of Ni5Mo15/Al2O3,Ni10Mo15/Al2O3,Ni15Mo15/Al2O3 and Ni20Mo15/Al2O3.Among them,the Ni5Mo15/Al2O3 catalyst achieves a C4H4S conversion rate of 70％at 290 ℃ and 90％at 330 ℃,significantly outperforming the other three catalysts.This is attributed to the formation of more active MoS2 species during the presulfurization process,resulting in a higher degree of sulfuration.However,with increasing NiO content,the phenomenon of NiO encapsulating MoO3 likely occurres,resulting in decreased sulfuration and diminished catalytic performance.关键词
NiO含量/焦炉煤气/噻吩/加氢脱硫/NiMo/Al2O3Key words
NiO content/coke oven gas/thiophene/hydrodesulfurization/NiMo/Al2O3分类
化学工程引用本文复制引用
李姣姣,秦志峰,李晓红,杜朕屹,于峰,翟志强,吴琼笑..NiO含量对NiMo/Al2O3催化剂在焦炉煤气中噻吩加氢脱硫性能的影响[J].低碳化学与化工,2025,50(4):71-79,9.基金项目
山西省科技重大专项(MJH2016-03) （MJH2016-03）
山西浙大新材料与化工研究院研发项目(2021ST-AT-002) （2021ST-AT-002）
东莞市能源投资集团有限公司攻关项目(RH2000004464). （RH2000004464）
