Forming of carbon-rich components from entrained-flow gasification fine slag and its gasification reactivity
LI Jinxin
LIU Bin
LYU Peng
BAI Yonghui
SONG Xudong
GUO Qinghua
YU Guangsuo
Abstract：As a core technology for clean and efficient coal utilization,entrained-flow coal gasi-fication technology has generated substantial amounts of coal gasification fine slag(CGFS)during its large-scale applications,making its scaled disposal and resource utilization an urgent priority.In this study,the carbon-rich components from Yulin CGFS was selected as the re-search object.Firstly,its chemical composition,particle size distribution and thermal stability and other physicochemical properties were analyzed.Then it was cold-pressed by adding com-posite binder,and the cold strength,thermal strength and thermal stability of the formed car-bon-rich component were evaluated.Finally,the thermal gravimetric analyzer was used to in-vestigate the reaction of the formed carbon-rich slag in the CO2 atmosphere.The results show that the carbon-rich component exhibit high fixed carbon content and developed pore structure,the composite binder effectively achieves the carbon rich component forming,yielding cold and thermal strengths of 4.48 and 1.77 MPa respectively.And the thermal stability exceed 85％,which can meet the requirements of atmospheric fixed-bed gasification.With increasing heating rates,the gasification reaction shift toward higher temperature regions,and the activation en-ergies calculated by FWO and KAS methods are 164 and 153 kJ/mol,respectively.These find-ings provide theoretical references for developing gasification technologies using formed car-bon-rich slag.
Keywords：entrained-flowgasification fine slagbindermoldingreactivity
Publication Date：2025-05-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 494-502 )