尿素/添加剂湿法烟气同时脱硫脱氮研究(Ⅰ)——吸收反应中尿素消耗的动力学方程  

Simultaneous Desulfurization and Denitrification from Flue Gas by Using Urea/Additive Solution(Ⅰ): Kinetic Equation of Urea Consumption in Absorption Reaction

作　　者：岑超平[1] 古国榜[2] 

机构地区：[1]国家环境保护总局华南环境科学研究所,广东广州510655 [2]华南理工大学应用化学系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2004年第1期37-40,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：科技部 863计划项目 (2 0 0 2AA52 9160 );广东省科技计划重大专项项目 (A3 0 40 2 0 3 );广东省环保局项目(2 0 0 1-3 4 )

摘　　要：研究尿素、添加剂的吸收剂溶液对烟气同时脱硫脱氮吸收反应过程中尿素消耗的动力学方程 .实验结果表明 ,吸收过程中尿素溶液浓度随时间的变化呈线性关系 ,即为零级反应方程 ;无添加剂的尿素溶液的反应速率常数k为 0 .8571mmol·L-1 ·min-1 ,而加入乙二胺和磷酸铵添加剂的尿素溶液反应速率常数k分别为 1 .945mmol·L-1 ·min-1 和1 .1 52 1mmol·L-1 ·min-1 .此外 ,烟气同时脱硫脱氮吸收反应的速率常数大于烟气单独脱硫吸收反应的速率常数和烟气单独脱氮吸收反应的速率常数之和 .The kinetic equation of urea consumption in absor pt ion reaction was studied in the process of simultaneous desulfurization and deni trification from flue gas by using urea/additive solution. The experimental resu lts show that the relationship between urea concentration and time is linear, an d the reaction order is zero. The rate constant k of absorption react ion of urea solution without additive is 0.857 1 mmol·L -1 min -1 , while k is res- pectively 1.945 mmo1·L -1 ·min -1 and 1.152 1 mmo1·L -1 ·min -1 with the additives of ethylenediamine and ammonium phosphate,. The rate c onstant of absorption reaction in the simultaneous desulfurization and denitrifi cation is greater than the sum of those obtained in separate desulfurization and denitrification, which shows the synergism in the process of simultaneous desul furization and denitrification.

关 键 词：尿素 添加剂 烟气 脱硫 脱氮 动力学方程 

分 类 号：X511[环境科学与工程—环境工程]