东南大学学报（自然科学版）Issue(5)：918-922,5.DOI:10.3969/j.issn.1001-0505.2015.05.017
纳米γFe2 O3催化剂 SCR 脱除 NOx 化学反应动力学
Chemical reaction kinetics of SCR of NOx over γFe2 O3 nano-catalyst
摘要
Abstract
In order to study the selective catalytic reduction (SCR) reaction mechanism overγFe2 O3 nano-catalyst,the kinetic parameters of the SCR reaction on γFe2 O3 nano-catalyst were in-vestigated by the differential reactor,and a reaction kinetic model was established.The experimental data analysis results show that the reaction orders are 0,0.78 to 0.93 and 0.09 to 0.11 for NH3 , NO and O2 ,respectively and the activation energy is 57.3 kJ/mol.The experimental results of dif-fuse reflectance infrared fourier transform spectroscopy (DRIFTS)show that NH3 can be strong ad-sorbed to the catalyst surface and the adsorption sites can be saturated by NH3 .The conversion rate of NO does not increase with the further increase of the NH3 concentration.At the presence of O2 , NO can be adsorbed to catalyst surface and converted to adsorbed NO2 and nitrite species.The SCR reaction mainly follows the Langmuir-Hinshelwood (L-H)mechanism at the temperature below 270℃,and follows Eley-Rideal (E-R)mechanism at the temperature above 270 ℃.关键词
纳米 γFe2 O3/化学反应动力学/活化能/原位红外漫反射光谱/选择性催化还原/脱硝Key words
γFe2 O3 nano-catalyst/chemical reaction kinetics/activation energy/diffuse reflectance in-frared fourier transform spectroscopy (DRIFTS)/selective catalytic reduction/denitration分类
能源科技引用本文复制引用
梁辉,归柯庭..纳米γFe2 O3催化剂 SCR 脱除 NOx 化学反应动力学[J].东南大学学报（自然科学版）,2015,(5):918-922,5.基金项目
国家自然科学基金资助项目（51276039）． （）
