Application of calcium oxide/ferric oxide composite oxygen carrier for corn straw chemical looping gasification. (June 2021)

• Record Type: Journal Article
• Authors: Hu, Jianjun; Zhang, Tianpeng; Zhang, Quanguo; Yan, Xiaoyu; Zhao, Shuheng; Dang, Jiatao; Wang, Wei
• Is Part Of: Bioresource technology. Volume 330(2021)
• Publication Date: 2021-06
• Subjects: Biomass -- Chemical looping gasification -- Composite oxygen carrier -- Greenhouse gas reduction -- Reaction mechanism; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125011
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The reactivity of CaO/Fe2 O3 composite oxygen carrier in biomass CLG was studied. Adding CaO to oxygen carrier could significantly improve the quality of syngas. Reaction temperature had obvious influence on the gas yield of biomass CLG. Crystal phase and structure variation of Ca affected the gas composition. Abstract: Biomass chemical looping gasification (CLG) technology is an important utilization form of renewable energy. In order to obtain high-quality syngas, CaO/Fe2 O3 was used as a composite oxygen carrier for biomass CLG in this study. The CLG experiment of corn straw and the study of oxygen carrier recycling were carried out, simultaneously, the reaction mechanism was further discussed. Results shown adding CaO to oxygen carrier could significantly improve the quality of syngas through increasing the H2 and reduce Greenhouse gas (CO2 and CH4, about 14% reduction). Besides, the ratio of Fe2 O3 to CaO, steam to biomass, and oxygen carrier to biomass all affected the syngas composition (the H2 /CO variation from 1.82 to 2.19), while the temperature had obvious influence on the gas yield of CLG. The most possible reaction mechanism shown that the variation of Ca might be the main factor of gas composition fluctuation.