程序升温热解磷酸氨镁及热解产物的氨氮脱除性能（英文）

发布时间：2018-04-24 10:42

本文选题：磷酸氨镁 + 程序升温　；参考：《Transactions of Nonferrous Metals Society of China》2016年09期

【摘要】：为使磷酸氨镁(MAP)脱氨完全及改善热解产物的氨氮去除性能,研究了一种程序升温的热解方式,并探讨了热解产物去除氨氮的热力学及动力学过程。结果表明,热解方式及热解终点温度明显影响MAP热解产物的氨氮去除性能,控制热解终点温度为180°C、5°C/min的程序升温方式,以及氨氮反应体系的p H值为9.5较为合适,在此条件下,MAP热解产物对氨氮的去除量达95.62 mg/g,经120 min对起始浓度为1000 mg/L氨氮的去除率达82%;动力学及热力学结果表明,MAP热解产物去除氨氮是H~+与NH_4~+的离子交换过程,其动力学符合Lagergren准二级模型,平衡时间为120 min,等温曲线符合Freundlich模型。
[Abstract]:In order to deamination completely and improve the ammonia-nitrogen removal performance of pyrolysis products, a pyrolysis method with programmed temperature was studied, and the thermodynamics and kinetics of ammonia-nitrogen removal by pyrolysis products were discussed. The results show that the pyrolysis mode and the end point temperature of pyrolysis obviously affect the ammonia-nitrogen removal performance of MAP pyrolysis products. It is more appropriate to control the programmed heating mode of the pyrolysis end point temperature of 180 掳C ~ (+) 5 掳C/min and the pH value of ammonia nitrogen reaction system to be 9.5. Under these conditions, the removal of ammonia nitrogen from map pyrolytic products was 95.62 mg / g, and the removal rate of ammonia nitrogen at the initial concentration of 1000 mg/L reached 82 parts after 120 min. The kinetic and thermodynamic results showed that the removal of ammonia nitrogen by map pyrolysis products was an ion exchange process between H ~ and NH _ 4 ~. The equilibrium time is 120 min and the isothermal curve accords with the Freundlich model.
【作者单位】：深圳职业技术学院深圳市工业节水与城市污水资源化技术重点实验室;广州大学土木工程学院;
【基金】：Project(ZDSY20120619093952884)supported by Shenzhen Strategic New Industry Development,China
【分类号】：X703

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