Investigation of Coal Fueled Chemical Looping Combustion Using Fe_3O_4 as Oxygen Carrier:Influence of Variables

作     者：Xiaoyan Sun Wenguo Xiang Sha Wang Wendong Tian Xiang Xu Yanji Xu Yunhan Xiao 

作者机构：School of Energy and Environment Southeast University Nanjing 210096 China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100080 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2010年第19卷第3期

页      面：266-275页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：the National Natural Science Foundation of China (50776018) the Special Fund of the National Priority Basic Research of China (2007CB 210101) for the financial support of this project 

主　　题：chemical-looping combustion CO2 separation magnetite 

摘      要：Chemical-looping combustion (CLC) is a novel combustion technique with inherent CO2 *** (Fe3O4) was selected as the oxygen *** coal (Inner Mongolia,China),straw coke and natural coke were used as fuels for this *** of operation temperatures,coal to Fe3O4 mass ratios,and different kinds of fuels on the reduction characteristics of the oxygen carrier were investigated using an atmosphere thermogravimetric analyzer (TGA).Scanning electron microscopy (SEM) was used to analyse the characteristic of the solid *** results shown that the reaction between the coal and the oxygen carrier become strong at a temperature of higher than 800℃.As the operation temperature rises,the reduction conversion rate *** the temperatures of 850oС,900℃,and 950℃,the reduction conversion rates were 37.1%,46.5%,and 54.1% ***,SEM images show that at the temperature of higher than 950℃,the iron oxides become melted and *** possible operation temperature should be kept around 900℃.When the mass ratios of coal to Fe3O4 were 5/95,10/90,15/85,and 20/80,the reduction conversion rates were 29.5%,40.8%,46.5%,and 46.6% *** the increase of coal,the conversion rate goes *** there exist an optimal ratio around 15/*** based on different kinds of fuels show that the solid fuel with a higher volatile and a more developed pore structure is conducive to the reduction reactivity of the oxygen carrier.