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Catalytic combustion shows promise in mitigating methane emissions from natural gas utilization, while the presence of sulfur species in natural gas can cause significant catalyst deactivation. Herein, a dual-modification strategy is proposed to construct active and sulfur-resistant nickel oxide (NiO)-based catalysts. Through regulating the hydrolysis of the silicon (Si) precursor and the precipitation of zirconium (Zr) and nickel (Ni) precursors, both the Si and Zr component could enter NiO lattice to generate strong interactions, leading to a decrease in crystallite size, an increase in active Ni2+ and surface adsorbed oxygen species for the efficient methane combustion. The incorporation of Si prominently enhanced the surface acidity of catalysts to inhibit the sulfating of NiO; the introduced Zr component also contributed to the generation of surface acid sites, and had a preferential interaction with sulfur dioxide (SO2) to protect Ni2+ sites. Consequently, the small NiO crystallites, active Ni2+ and oxygen species could be maintained in dual-modified catalysts under sulfur-containing reaction conditions, leading to the superior catalytic performance compared to NiO or catalysts modified by Zr or Si. This work introduces a practical and efficient approach for developing catalysts to remove gaseous pollutants.
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JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
ISSN: 2213-2929
Year: 2024
Issue: 1
Volume: 13
7 . 4 0 0
JCR@2023
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4