摘要
用过量CaCl2将含碳离子和含氮离子分别转变为CaCO3和NH4+(或NH3和NH4+),通过甲醛法测定上清液中氮量计算得到碳化氨水中总氨浓度,用EDTA滴定过量Ca2+得到碳化氨水中总碳浓度.结果表明,总碳和总氨浓度的测定结果与理论值间的相对误差分别在1.0%和1.5%以内.该方法能快速准确测定碳化氨水溶液中含碳量和含氨量,进而得到氨水吸收CO2过程中CO2负载量.
An excessive CaCl2 solution was applied to convert all carbonates and NH2COO^- into CaCO3 and NH4^＋ or （NH3 and NH4^＋）, respectively. Then after CaCO3 was removed by filtrating, the concentration of total NH3 in filter liquor could be obtained by measuring the amount of nitrogen with formol-titration method. And the concentration of total CO2 could be measured by determining the excessive amount of Ca^2＋ with EDTA titration method. The results showed that relative error of the method for determining the concentrations of total CO2 and total NH3 was less than 1.0% and 1.5%, respectively. Therefore, this method could be adapted to determinate the important index, CO2 loading, when CO2 was absorbed into aqueous ammonia.
出处
《过程工程学报》
CAS
CSCD
北大核心
2013年第2期292-296,共5页
The Chinese Journal of Process Engineering
基金
国家科技支撑计划基金资助项目(编号:2011BAC11B03)
关键词
碳化氨水
甲醛法
总氨浓度
EDTA滴定法
总碳浓度
carbonating ammoniacal solution
formol-titration method
total NH3
EDTA titration method
total CO2
作者简介
刘明（1989-），男，山东省枣庄市人，硕士研究生，生物工程专业：
丛威，通讯联系人，Tel：010-82627060，E-mail：weicong@home．ipe．ac．cn．
