Experimental study on reactivity and inorganic component transformation of activated fuels in a fluidized bed  

作　　者：Yujie Hu Wei Li Rui Chen Chi Zhang Shaobo Han Ruifang Cui Jiangong Lin Qiangqiang Ren 

机构地区：[1]State Key Laboratory of Coal Conversion,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shanxi Datong University,Datong 037009,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第10期52-62,共11页中国化学工程学报（英文版）

基　　金：supported by CAS Project for Young Scientists in Basic Research(YSBR-028);the Youth Innovation Promotion Association CAS(2020150).

摘　　要：The gasification and combustion of activated fuels produced from fluidized beds are beneficial for achieving clean and efficient coal utilization.In this study,a high-calcium coal was used for the activation process,carried out in a high-temperature vertical fluidized bed.The carbon and ash characteristics of activated fuels were studied.The reactivity of activated fuels was characterized using Raman test,and scanning electron microscopy coupled with energy-dispersive spectrometry(SEM-EDS).Inorganic components were characterized using X-ray diffraction(XRD)and X-ray fluorescence spectrometry(XRF).With the increase in temperature and equivalence ratio(ER),the graphitization degree of activated fuels decreases,and a higher proportion of active sites leads to,a better activation effect.The activation effect is optimized at the equivalence ratio of 0.45.As the temperature rises,the calcium-containing minerals in the raw coal are gradually transformed into anorthite(CaAl_(2)SiO_(7)),and the anhydrite(CaSO_(4))reacts with the reducing gas(CO)to produce oldhamite(CaS);Fe_(2)O_(3),as a fluxing agent,is prone to melting with silica-aluminates at high temperature.As the particle size of activated fuel increased,the relative enrichment index(REI)of heavy metals decreased.

关 键 词：Activation FLUIDIZED-BED Microstructure Ash characteristics Mineral transformation Ash fusion 

分 类 号：TQ534[化学工程—煤化学工程]