Synergistic Adsorption and In Situ Catalytic Conversion of SO 2 by Transformed Bimetal-Phenolic Functionalized Biomass

• Published in: Environmental science & technology 2023-08, Vol.57 (34), p.12911-12921
• Main Authors: Xiao, Gao, Xie, Qiuping, He, Yunxiang, Huang, Xin, Richardson, Joseph J, Dai, Manna, Hua, Jian, Li, Xin, Guo, Junling, Liao, Xuepin, Shi, Bi
• Format: Article
• Language: English
• ISSN: 0013-936X; 1520-5851
• DOI: 10.1021/acs.est.3c03827

SO removal is critical to flue gas purification. However, based on performance and cost, materials under development are hardly adequate substitutes for active carbon-based materials. Here, we engineered biomass-derived nanostructured carbon nanofibers integrated with highly dispersed bimetallic Ti/CoO nanoparticles through the thermal transition of metal-phenolic functionalized industrial leather wastes for synergistic SO adsorption and in situ catalytic conversion. The generation of surface-SO and peroxide species (O ) by Ti/CoO achieved catalytic conversion of adsorbed SO into value-added liquid H SO , which can be discharged from porous nanofibers. This approach can also avoid the accumulation of the adsorbed SO , thereby achieving high desulfurization activity and a long operating life over 6000 min, preceding current state-of-the-art active carbon-based desulfurization materials. Combined with the techno-economic and carbon footprint analysis from 36 areas in China, we demonstrated an economically viable and scalable solution for real-world SO removal on the industrial scale.