Unblocking of NiMo Active Sites for Hydrodesulfurization Catalysts: A Study Focused on Inactive Ni x S y Segregation

被引：3

作者：

Arora, Shalini ^{[1
]}

Sivakumar, Sri ^{[2
,3
]}

机构：

[1] Indian Inst Technol Kanpur, Dept Chem Engn, Kanpur 208016, UP, India

[2] Indian Inst Technol Kanpur, Dept Chem Engn, Mat Sci Programme, Kanpur 208016, UP, India

[3] Indian Inst Technol Kanpur, Ctr Environm Sci & Engn, DST Themat Unit Excellence Soft Nanofabricat, Kanpur 208016, UP, India

来源：

ENERGY & FUELS | 2023年 / 37卷 / 12期

关键词：

THIOPHENE HYDRODESULFURIZATION; PROMOTER SEGREGATION; SULFIDE CATALYSTS; MOS2; MORPHOLOGY; SUPPORT; DESULFURIZATION; PHASE; DIBENZOTHIOPHENE; OXIDATION; REMOVAL;

D O I：

10.1021/acs.energyfuels.3c00893

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The formation of Ni x S y /Co x S y phases on the HDS catalyst surface during catalystpreparation posesthe following challenges in the HDS reaction: (1) inactive in thereaction, (2) hinder the role of promoters, (3) block the activessites (NiMoS/CoMoS) at the perimeter, and (4) increase the inert masson the catalyst surface. Since the formation of Ni x S y /Co x S y phases is thermodynamically favorable,it is difficult to control this during the catalyst synthesis. Inthis regard, this work investigates the effect of metal-support interactionsand catalyst compositions on Ni x S y phase separation and removal of Ni x S y phases from the catalystsurface using acid-leaching method. The HDS activity for NiMo supportedon amorphous alumina (NiMo/A-Al2O3) catalystssignificantly increased after the acid-leaching treatment by unblockingthe active NiMoS sites and increasing the Ni-MoS2 interactionthrough alumina support leaching. Overall, the HDS activity for leachedNiMo/A-Al2O3 catalysts is 25-30% higherthan that for conventional NiMo/gamma-Al2O3 catalysts.

引用

页码：8539 / 8551

页数：13

共 48 条

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