首页|红砖掺杂改性白云鄂博铁精矿载氧体性能

红砖掺杂改性白云鄂博铁精矿载氧体性能

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采用机械混合法,添加建筑固废红砖粉末制备改性白云鄂博铁精矿载氧体,通过热重分析仪和管式炉实验,分析红砖粉末添加量对CO化学链燃烧性能优化效果,并通过扫描电子显微镜、X射线衍射、比表面积分析以及动力学分析等表征手段分析其机制.结果表明,通过DTG曲线可以看出白云鄂博铁精矿载氧体与CO的反应温度基本都高于800℃,红砖粉末改性载氧体可以提升化学链燃烧反应速率,加快反应进程,特别是2.5%红砖改性样品,在950℃下反应效果是最优的,CO2产率达到了 87%;通过对程序升温实验数据进行动力学分析,发现红砖粉末可以缩短其与CO的反应时间,加快反应进程,并且基于循环反应实验,改性载氧体表现出了更稳定的碳转化率.其反应能力的提升和循环稳定性的加强主要是由于红砖粉末使载氧体具有更高的比表面积和孔隙结构所致.
Red brick doping modified Baiyun Obo iron ore concentrate oxygen carrier performance
The modified Baiyun Obo iron ore concentrate oxygen carrier was prepared by mechanical mixing method with the addition of red brick powder from construction solid waste,and the effect of red brick powder addition on CO chemical chain combustion performance was analyzed by thermogravimetric analyzer and tube furnace experiments,and the mechanism was analyzed by means of characterization such as SEM,XRD,BET,and kinetic analyses.Through the DTG curve,it could be seen that the reaction temperature of Baiyun Ebo iron ore concentrate carrier with CO was basically higher than 800℃,and the red brick powder modified carrier could enhance the chemical chain combustion reaction rate and accelerate the reaction process,especially for the 2.5%red brick modified sample,the reaction effect was optimal at 950℃,and the CO2 yield reaches 87%.The kinetic analysis of the programmed heating experimental data revealed that the red brick powder could shorten the reaction time with CO and accelerate the reaction process,and based on the cyclic reaction experiments,the modified oxygen carrier exhibited a more stable carbon conversion rate.The improved reactivity and enhanced cyclic stability were mainly due to the higher specific surface area and pore structure of the oxygen carriers by the red brick powder.

iron ore concentratechemical looping combustionoxygen carriersconstruction solid wastekinetic analysis

张鹏飞、陈伟鹏、肖卓楠、吕青岗、张顺风、张子峰

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内蒙古科技大学能源与环境学院,内蒙古包头 014010

内蒙古包钢股份长材厂,内蒙古包头 014010

东北电力大学能源与动力工程学院,吉林吉林 132012

铁精矿 化学链燃烧 载氧体 建筑固废 动力学分析

内蒙古自治区高等学校科学研究项目

NJZZ23061

2024

化工进展
中国化工学会,化学工业出版社

化工进展

CSTPCD北大核心
影响因子:1.062
ISSN:1000-6613
年,卷(期):2024.43(4)
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