摘要
考察了Mg（OH）2辅助碱性介质对磷酸铵镁降解的媒介作用,解析了磷酸铵镁热解动力学过程。Mg（OH）2碱促热解为3步降解过程,5 K/min时,其最大吸热峰为390 K;Mg（OH）2碱促热解动力学降解模型符合自催化降速模型,存在2种以上的降解途径;氨基剥离所需活化能在34.4-112.9 kJ/mol之间,Mg（OH）2碱促热解动力学方程为：f（α）=k0（1-α）^n,线性相关系数为0.994,反应级数为6.12。
The effect of Mg（OH）2on struvite decomposition was investigated,anda thermo-kinetics of struvite decomposition was studied. The results showed that degradation process of struvite with Mg（OH）2addition was three steps,and the temperature of the endothermic peak was 390 K（ 5 K/min）. The mechanism of sturvite decomposition with Mg（OH）2mediated was an autocatalytic set with a reduction in the reaction rate also,the degradation had more than two pathways,the activation energy of stripping ammonia from struvite was from 34. 4k J/mol to 112. 9 kJ/mol. The kinetics equation was f（ α） = k0（ 1- α）^n,the coefficient of linear correlation was0. 994 and the reaction order was 6. 12.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第12期5727-5731,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51178216)
