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A review on reactivity characteristics and synergy behavior of biomass and coal Co-gasification

2021; Elsevier BV; Volume: 46; Issue: 33 Linguagem: Inglês

10.1016/j.ijhydene.2021.02.162

1879-3487

Juntao Wei, Miao Wang, Fuchen Wang, Xudong Song, Guangsuo Yu, Yurong Liu, Hari B. Vuthaluru, Jie Xu, Yin Xu, Hong Zhang, Shu Zhang,

Catalysts for Methane Reforming

Co-gasification is a promising approach to the clean and high-efficiency co-utilization of biomass and coal with syngas (H2+CO) production. Gasification reactivity is an important factor influencing the operation conditions choice, carbon conversion efficiency and syngas production performance. Coal-biomass interaction during co-gasification will directly result in the synergy behavior of different forms and intensities on co-gasification reactivity. Due to the fuel origin diversity, structural property difference and reaction process complexity of biomass and coal, a clear understanding of reactivity characteristics and synergy behavior of co-gasification is very essential for revealing co-gasification reaction mechanism and providing theoretical support for actual application. In this paper, the influences factors (such as feedstock type, blended ratio, gasification temperature, co-pyrolysis process, gasification reactor and biomass pretreatment) for co-gasification reactivity and the synergy behavior on co-gasification reactivity are summarized in details, and non-catalytic/catalytic synergy mechanisms for co-gasification are discussed. Previous researchers have acquired a plenty of meaning data, providing important reference for industrial application of co-gasification technology. However, volatile matter-char interaction mechanism during co-pyrolysis was still unclear, AAEM migration and transformation route during co-gasification are lack of in-situ analysis, transfer route and interaction of free radicals during co-gasification process were unknown, and co-gasification kinetics model containing dynamic synergistic/inhibition factors hasn't been established.