KAlF_(4)掺混纳米Al颗粒共热共燃特性研究  

Co-pyrolysis and co-combustion characteristics of KAlF_(4)blended with nano-aluminum

作　　者：周宇 林其钊[2] ZHOU Yu;LIN Qizhao(School of Physics and Electrical Engineering,Liupanshui Normal University,Liupanshui 553004,China;School of Engineering Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]六盘水师范学院物理与电气工程学院,贵州六盘水553004 [2]中国科学技术大学工程科学学院,安徽合肥230026

出　　处：《应用化工》2025年第1期86-92,98,共8页Applied Chemical Industry

基　　金：国家重点研发计划(2021YFF0601004);贵州省科技厅科学技术基金(黔科合基础-ZK[2021]一般280);六盘水红果开发区龙鼎工贸有限公司横向项目(LD-LPSSY-ZY-2021-01);六盘水师范学院校级基金项目(LPSSYKYJJ201813)。

摘　　要：分别对50,100 nm和800 nm粒径纳米铝(nAl)粉中掺混质量分数为0%~50%KAlF_(4)的混合燃料进行热重分析和燃烧实验,并对燃烧产物的微观形貌进行分析。结果表明,掺混KAlF_(4)对大粒径nAl热特性的提升效果更显著,随着KAlF_(4)掺混比例从0%增加到50%,nAl_(800)+KAlF_(4)混合燃料的初始反应温度由434.99℃降低到361.91℃;100%nAl_(800)未能成功点燃,而掺混10%和20%KAlF_(4)后样品被成功点燃,KAlF_(4)的掺混可以改善混合样品的热解和燃烧过程;随着KAlF_(4)掺混比例的提高,化学反应速率和着火延迟时间分别呈现先增大后减小和减小后增大的趋势,最佳掺混比例为30%。此外,KAlF_(4)的加入可以显著降低燃烧产物的黏度,有利于燃烧产物的清洗处理。Thermogravimetric analysis and combustion experiments of 0%~50%KAlF_(4)blended with 50,100,800 nm nano-aluminum(nAl)powder were carried out,and the micro-morphology of combustion products was analyzed.The results show that the blending of KAlF_(4)has a more significant effect on the thermal characteristics of large-size nAl.With the blending ratio of KAlF_(4)increase from 0%to 50%,the initial reaction temperature of nAl_(800)+KAlF_(4)decreases from 434.99℃to 361.91℃.100%nAl_(800) failed to ignite successfully,while the samples were successfully ignited after blending 10%and 20%KAlF_(4).The blending of KAlF_(4)can improve the pyrolysis and combustion process of the blended samples.With the increase of KAlF_(4)blending ratio,the chemical reaction rate increase first and then decrease,and ignition delay time decrease first and then increase,respectively.The optimum blending ratio is 30%.In addition,the blending of KAlF_(4)can significantly reduce the viscosity of combustion products,which is beneficial to the cleaning.

关 键 词：纳米铝 KAlF_(4) 热重分析 燃烧过程 

分 类 号：TQ51[化学工程] TK16[动力工程及工程热物理—热能工程]