The study of coke resistance of Ni/ZrO2 by core-shell structure coupling with cobalt doping modification in CO2 reforming of tar

The issue of loaded Ni/ZrO2 catalyst deactivation has limited the further development of biomass tar reforming. To reduce sintering and coke deposition by optimizing the catalyst, the effects of core-shell structure and cobalt doping coupling on coke deposition in Ni/ZrO2 catalyst are investigated....

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. A, General General, 2022-08, Vol.643, p.118797, Article 118797
Main Authors: Tian, Yunlong, Ma, Xiaoqian, Chen, Xinfei, Zhang, Chaoyue, Li, Junjie
Format: Article
Language:English
Subjects:
Acetone
Carbon dioxide
Catalysts
CO2 reforming
Cobalt
Coke
Coke resistance
Conversion
Core-shell structure
Coupling
Deactivation
Deposition
Doping
Ni8Co/ZrO2@SiO2
Reforming
Silicon dioxide
Sintering (powder metallurgy)
Structural analysis
Tars
Toluene
Zirconium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The issue of loaded Ni/ZrO2 catalyst deactivation has limited the further development of biomass tar reforming. To reduce sintering and coke deposition by optimizing the catalyst, the effects of core-shell structure and cobalt doping coupling on coke deposition in Ni/ZrO2 catalyst are investigated. The Ni/ZrO2 catalyst was deactivated by coke deposition and sintering after 150 min of CO2 reforming of tar. The Ni8Co/ZrO2 @SiO2 catalyst exhibited high stability and efficiency of hydrogen conversion (CH) (50–67 %) and carbon conversion (CC) (40–60 %) in the toluene reforming, and the CH (65–81 %) and CC (73–100 %) in the acetone reforming within 300 min due to the larger specific surface area and richer pore structure. The characterization on the used catalysts showed that only filamentous coke without encapsulated coke was observed after the reforming of different type of tars reaction. The Ni8Co/ZrO2 @SiO2 catalyst yielded only 6 % and 0.2 % filamentous coke after toluene and acetone reforming reactions. [Display omitted] •Only filamentous coke is produced in the CO2 reforming of different tar components.•Ni/ZrO2 deactivated due to coke and sintering in CO2 reforming of tar.•The core-shell structure can resist catalyst sintering and coke deposition.•The cobalt doping can further improve the resistance of coke deposition.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2022.118797