摘要：To improve the selectivity in the hydrocracking of polycyclic aromatic hydrocarbons (PAHs), this study innovatively introduced Fe as a modified metal, aiming to weaken the interaction between the Co-Mo active metal and the gamma-Al2O3 support. A series of Fe-modified Co-Mo/gamma-Al2O3 catalysts with different Fe content were prepared by impregnation method. Techniques such as XRD, N2 physical adsorption-desorption, NH3-TPD, Py-IR, H2-TPR, HRTEM and XPS were used for characterization, and the catalytic performance of the catalysts were analyzed on a fixed-bed reactor. The pre-impregnation of Fe did not significantly alter the catalyst＇s crystal structure or pore architecture. However, it reduced the support surface acidity and weakened the metal-support interaction. This weakening facilitated an increase in the population of highly active octahedrally coordinated Mo species and promoted the transformation of active phase slabs with smaller size and higher stacking numbers. The structure of this active phase enhances the dispersion and sulfidation degree of the active metal components, increasing the hydrogenation activity and selectivity of the catalyst. The catalyst modified with 1.0 wt% Fe via pre-impregnation achieved a high phenanthrene (PHE) conversion under the conditions of 330 degrees C, 4 MPa, 600 hydrogen-oil ratio, and 10 h-1 LHSV. The conversion rate of PHE is 81.75 %, the 9,10-dihydrophenanthrene (DHP) selectivity is 23.15 %, and the yield is 18.93 %. Pre-impregnated Fe modified catalysts can more effectively weaken the interaction between the support and the active metal, and are more conducive to the formation of more highly active hexa-coordinated Mo species.

关键字：PAHs; Hydrocracking; Fe modification; CoMoS

ISSN号：2468-8231

卷、期、页：网络发表

发表日期：2026-02-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）

发表期刊名称：MOLECULAR CATALYSIS

参与作者：闫祎统,黄文斌

通讯作者：郭世轩,白天瑜,杨晗,黄萌,邵凡,许振,李蓉蓉

第一作者：魏强

论文类型：期刊论文

论文概要：郭世轩,闫祎统,白天瑜,杨晗,黄萌,邵凡,许振,李蓉蓉,黄文斌,魏强，Catalytic performance of Fe modified Co-Mo/γ-Al2O3 catalysts for selective hydrogenation of polycyclic aromatic hydrocarbons，MOLECULAR CATALYSIS，2026，网络发表

论文题目：Catalytic performance of Fe modified Co-Mo/γ-Al2O3 catalysts for selective hydrogenation of polycyclic aromatic hydrocarbons