摘要
采用自制的Mg⁃Zn合金粉尘与水反应产氢实验仪,系统地研究了温度、合金中Mg含量及水体中Cl^(-)的质量分数对湿式除尘器中的Mg⁃Zn合金粉尘与水反应的产氢量和产氢速率的影响,并通过对反应前后的物质进行XRD,SEM检测分析,探究了产氢反应的机理.结果表明:随着水浴温度、Mg含量和Cl^(-)质量分数的增加,该反应的产氢量和产氢速率增大,最大产氢速率存在于反应开始的瞬间,而产氢量的增大使除尘器中发生H_(2)爆炸的可能性也变大;整个反应可分为快速和平稳两个反应阶段,快速反应阶段主要发生Mg⁃H_(2)O反应和Mg⁃Zn原电池反应,平稳反应阶段主要发生Mg⁃H_(2)O反应、Cl^(-)点蚀反应及Mg吸氢反应.该研究结果可为Mg⁃Zn合金加工企业有效防止湿式除尘器中发生氢气爆炸提供理论指导.
The effects of temperature,Mg content in the alloy and Cl^(-)mass fraction in the water on the hydrogen production and hydrogen production rate of the reaction between Mg⁃Zn alloy dust and water in the wet dust collector were systematically studied by using the self-made experimental instrument for hydrogen production from Mg⁃Zn alloy dust and water.The mechanism of hydrogen production was explored by XRD and SEM.The results show that the higher the water bath temperature,Mg content and Cl^(-)mass fraction,the greater the hydrogen production and hydrogen production rate.The maximum hydrogen production rate exists at the beginning of the reaction;With the increase of hydrogen production,the possibility of H_(2)explosion in the dust collector increases;The whole reaction can be divided into two reaction stages:rapid reaction stage mainly occurs Mg⁃H_(2)O reaction and Mg⁃Zn galvanic cell reaction,and stable reaction stage mainly occurs Mg⁃H_(2)O reaction,Cl^(-)pitting reaction and Mg hydrogen absorption reaction.The research results can provide theoretical guidance for Mg⁃Zn alloy processing enterprises to effectively prevent H_(2)explosion in wet dust collector.
作者
李梦源
许开立
张毓媛
王犇
Li Mengyuan;Xu Kaili;Zhang Yuyuan;Wang Ben(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《材料与冶金学报》
CAS
北大核心
2022年第4期293-299,共7页
Journal of Materials and Metallurgy
基金
国家自然科学基金委科学基金项目(52074066).
关键词
Mg⁃Zn合金
湿式除尘
产氢机理
影响因素
Mg⁃Zn alloy
wet dedusting
hydrogen production mechanism
influence factor
作者简介
李梦源(1998-),男,硕士研究生,E⁃mail:li_mengyuan@aliyun.com;许开立(1965-),男,教授,博士生导师,E⁃mail:xukaili@mail.neu.edu.cn.
