Ca-and Mg-rich waste as high active carrier for chemical looping gasification of biomass

作     者：Xin Niu Laihong Shen Xin Niu;Laihong Shen

作者机构：School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSchool of Energy and EnvironmentSoutheast UniversityNanjing 210096China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第10期

页      面：145-154页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 0817[工学-化学工程与技术] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.52006104) the Fundamental Research Funds for the Central Universities(No.30919011237) 

主　　题：Biomass Syngas Gasification Ca-and Mg-rich waste Chemical looping 

摘      要：Chemical looping gasification(CLG)is a promising technology for high-quality syngas *** key issue to successful CLG is the selection of high-performance oxygen *** this study,several Ca-and Mg-rich steelmaking wastes from steel industry,such as blast furnace slag(BF slag),blast furnace dust(BF dust)and Linz-Donawitz converter slag(LD slag),were used as oxygen carriers in chemical looping gasification of *** results showed that the reducibility of Ca-and Mg-rich waste,especially LD slag and BF dust,was superior to that of *** long-term operation,the cyclic stability of steelmaking waste was *** dust showed a poor stability,while the other carrier(hematite,BF slag or LD slag)presented an excellent stability during multiple redox cycles in spite of partial sintering and ***,the effects of supply oxygen coefficient(O/B ratio)and reaction temperature on CLG of biomass were *** results revealed that Ca-and Mg-rich waste exhibited a higher syngas production compared to *** higher performance could be attributed to the improved reduction rate of Fe2O3 and gasification rate of biomass by Ca or Mg in steelmaking *** addition,LD slag exhibited the higher gas value at the O/B ratio of 1 at 900℃.As a consequence,LD slag was an appropriate oxygen carrier for CLG of biomass in terms of perfect reducibility,superior cyclic stability and high reactivity.