摘要
柴油车用尿素水溶液是柴油车选择性催化还原系统使用的一种氮氧化物还原剂,为了建立尿素水溶液中尿素质量分数与溶液密度-折光率的关系,分别测定20℃时不同质量分数尿素水溶液的折光率和密度,结果发现:尿素质量分数在一定区间内与溶液密度和折光率呈线性关系,即ρ_(20)=0.4654x+1083.8、n^(20)_(D)=0.0002x+1.1395;在温度t℃时,尿素质量分数与密度计算模型为ω=[ρ_(t)-1083.8+(Δt×0.23)]/0.4654、与折光率的计算模型为ω=[n^(t)_(D)-1.3795+(Δt×0.00052)]/0.0002.
Diesel vehicle urea aqueous solution is a kind of nitrogen oxide reducing agent used in the selective catalytic reduction system of diesel vehicle.In order to establish the relationship between the urea mass fraction in the urea aqueous solution and the density-refractive index of the solution,the refractive index and density of urea aqueous solution with different mass fractions at 20℃were measured respectively.The results show that the mass fraction of urea in urea solution has a linear relationship with solution density and refractive index in a certain range,and the linear relationship is ρ_(20)=0.4654x+1083.8,n^(20)_(D)=0.0002x+1.3795.At t℃,the calculation models of urea mass fraction and density isω=[ρ_(t)-1083.8+(Δt×0.23)]/0.4654;the calculation model for urea refractive index isω=[n^(t)_(D)-1.3795+(Δt×0.00052)]/0.0002.
作者
剡根姣
王文华
YAN Genjiao;WANG Wenhua(Chemical Engineering Institute,Yinchuan University of Energy,Ningxia,Yinchuan 750021,China;Ningxia Academy of Metrol-ogy&Quality Inspection,Ningxia,Yinchuan 750021,China)
出处
《宜宾学院学报》
2025年第12期59-64,共6页
Journal of Yibin University
基金
宁夏回族自治区教育厅高等学校科学研究项目(2022140)。
关键词
柴油车用
尿素水溶液
尿素质量分数
密度-折光率法
快速测定
质量控制
diesel vehicle
urea aqueous solution
urea mass fration
density-refractive index method
rapid determination
quality control
