化学工程2017，Vol.45Issue(5)：68-71,78,5.DOI:10.3969/j.issn.1005-9954.2017.05.015
磷石膏制硫酸铵的反应机理与动力学实验研究
Reaction mechanism and kinetics of ammonium sulfate prepared by phosphogypsum
摘要
Abstract
The reaction mechanism and the intrinsic kinetic rate equation of ammonium sulfate from phosphogypsum were studied.The reaction was carried out on the solid-liquid interface between the phosphorus gypsum and ammonium carbonate through theoretical research and experimental demonstration.In other words,the reaction mechanism was in accordance with shrink core model.In the determination of kinetic rate equation,the reaction rate was approximately only related to the concentration of ammonium carbonate due to the slightly soluble in water of phosphorus gypsum.Experimental results were obtained at 0 ℃,5 ℃ and 10 ℃ under the conditions of low temperature,low concentration of ammonium carbonate,high agitation rate and excess phosphogypsum.Moreover,the activation energy of the reaction between phosphogypsum and ammonium carbonate was obtained by fitting the rate constants of different temperatures.The activation energy is 37 246.64 J/mol,and the pre-exponential factor is 77 033.83 min-1.关键词
磷石膏/硫酸铵/反应机理/本征动力学Key words
phosphogypsum/ammonium sulfate/reaction mechanism/intrinsic kinetic分类
化学化工引用本文复制引用
何兵兵,胡宏,薛绍秀,解田..磷石膏制硫酸铵的反应机理与动力学实验研究[J].化学工程,2017,45(5):68-71,78,5.基金项目
贵州科学技术基金(黔科合J字[2012]2321) （黔科合J字[2012]2321）
“西部之光”人才培养计划项目(科发人教字[2012]179) （科发人教字[2012]179）
