摘要
对氢氧化钠吸收氧化氮作用机理的研究表明:在吸收过程中,氢氧化钠只能中和氧化氮水合反应生成的亚硝酸和硝酸。因消除了亚硝酸的分解,碱液吸收氧化氮的速率高于水的吸收速率。实验分别测定了氢氧化钠吸收NO_2(含N_2O_4)和NO_x的吸收速率。拟合NO_2吸收速率得:NO_2水合反应关于NO_2为二级,速率常数为7.40×10~4m^3/mol·s;N_2O_4水合反应关于N_2O_4为一级,速率常数为825s^(-1)。拟合NO_x吸收速率得:反应速率关于N_2O_3为一级,速率常数为850s^(-1)。所有水合反应都是快速反应。
According to the research in the mechanism of nitrogen oxides absorption by NaOH aqueous solution, the function of NaOH is to neutralize HNO2 and HNO3 , which are produced in nitrogen oxides hydrolization. The nitrogen oxides absorption rate by NaOH is higher than that by water because of the elimination of HNO2 decomposition. The absorption rates of NO2 (including N2 O4 ) and NOX were measured experimentally. The results show that the hydrolization reaction cf NO2 , N2O4 and NOx is the 2nd order, 1st order and 1st order with respect to NO2, N2O4 and N2O3, and the reaction rate is 7. 4×104m3/ (mol·s) , 825s-1 and 850s-1, respectively. All of the hydrolization reactions are rapid reaction. The characteristics of nitrogen oxides absorption by NaOH aqueous solution are discussed in the paper.
出处
《高校化学工程学报》
EI
CAS
CSCD
1990年第2期157-167,共11页
Journal of Chemical Engineering of Chinese Universities
