Effects of Initial Non-Methane Hydrocarbon and Nitrogen Oxides Concentration on 0³ Formation in Ultraviolet Irradiation of Modified Auto-Exhaust Gas

Analysis by Multiple Regression Analysis

Abstract

From the ultraviolet irradiation test of modified auto-exhaust gas, the relation between O_3max and initial non-methane hydrocarbon (NMHC), nitrogen oxides (NO_x) concentrations was analyzed by multiple regression analysis. Multiple correlation coefficients of multiple regression formula, in which O_{3 max} was critorion variable and the concentrations of NMHC, NO_x were predictor variables, denoted good significance at significant level of 0.01 or 0.05, it became apparent that 0_{3 max} related to [NMHC] ₀ and (NO_x) ₀. By the comparison of standardized partial regrossion coefficients, it was clarified that 0_{3 max} was greatly affected by NMHC in [NMHC] ₀/[NO_x] ₀ ratio 4-15, and also was greatly affected by NO_xin [NMHC] ₀/[NO_x] ₀ ratio 15-46.