Dataset on Experimental Investigation of Urea-Water Injection-Borne Particles in Selective Catalytic Reduction Systems of Hydrogen Combustion Engines

This dataset contains measurement data supporting the publication "Experimental Investigation of Urea-Water Injection-Borne Particles in Selective Catalytic Reduction Systems of Hydrogen Combustion Engines" published in the Fuel, 2026 (DOI: https://doi.org/10.1016/j.fuel.2026.138698). The dataset includes time-averaged values collected under steady-state experimental conditions. A brief explanation of the signal naming conventions is provided below. A more detailed description is available in the "Info" tab within the dataset. For comprehensive context, experimental setup, and methodology, please refer to the associated publication. Unit 2 3 4 5 6 Engine Speed (set-point) 1/min 1200 1100 1150 1250 1100 Engine Torque (set-point) Nm 760 680 480 553 568 Exhaust mass flow kg/h 500 409 322 400 406 Exhaust gas temperature after DPF °C 408 400 352 360 311 Category Channel Unit Description Hardware configuration DOC - Diesel oxidation catalyst (DOC) used DPF - Diesel particulate filter (DPF) used Spray - Urea-water-solution (UWS) spray used Mixer - Urea mixing unit used SCR - Selective catalytic reduction (SCR) catalyst used ASC - Ammonia slip catalyst (ASC) used Operating point OP - Engine operating point PWR kW Engine power MF_EXH kg/h Exhaust mass flow T_ADPF °C Exhaust gas temperature after DPF Measurement - Type of measurement UWS g/h UWS rate ANR - Ammonia to NOx ratio (ANR) Solid particle number from AVL APC 489 C_PN10 1/cm^3 Particle number concentration (PN) at 10 nm cut-off size C_PN23 1/cm^3 Particle number concentration (PN) at 23 nm cut-off size NF_PN10 1/s Particle number flow for PN10 NF_PN23 1/s Particle number flow for PN23 BS_PN10 1/kWh Particle number related to engine work for PN10 BS_PN23 1/kWh Particle number related to engine work for PN23 Particle size distribution from TSI EEPS 3090 6,04 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 6,04 nm 6,98 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 6,98 nm 8,06 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 8,06 nm 9,31 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 9,31 nm 10,8 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 10,8 nm 12,4 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 12,4 nm 14,3 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 14,3 nm 16,5 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 16,5 nm 19,1 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 19,1 nm 22,1 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 22,1 nm 25,5 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 25,5 nm 29,4 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 29,4 nm 34 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 34 nm 39,2 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 39,2 nm 45,3 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 45,3 nm 52,3 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 52,3 nm 60,4 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 60,4 nm 69,8 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 69,8 nm 80,6 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 80,6 nm 93,1 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 93,1 nm 107,5 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 107,5 nm 124,1 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 124,1 nm 143,3 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 143,3 nm 165,5 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 165,5 nm 191,1 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 191,1 nm 220,7 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 220,7 nm 254,8 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 254,8 nm 294,3 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 294,3 nm 339,8 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 339,8 nm 392,4 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 392,4 nm 453,2 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 453,2 nm 523,3 1/cm^3 Normalized particle concentration (dN/dlogDp) for midpoint particle diameter (Dp) of 523,3 nm Particle number from TSI EEPS 3090 Total_PN 1/cm^3 Total particle number PN10 1/cm^3 Particle number concentration (PN) at 10 nm cut-off size PN23 1/cm^3 Particle number concentration (PN) at 23 nm cut-off size Temperatures in the exhaust aftertreatment system T_BSCR °C Exhaust gas temperature before SCR catalyst T_TP °C Exhaust gas temperature at tail pipe T_1A °C Wall temperature at the mixing pipe with mixer T_1B °C Wall temperature at the mixing pipe with mixer T_1C °C Wall temperature at the mixing pipe with mixer T_2A °C Wall temperature at the mixing pipe with mixer T_2B °C Wall temperature at the mixing pipe with mixer T_2C °C Wall temperature at the mixing pipe with mixer T_3A °C Wall temperature at the mixing pipe with mixer T_3B °C Wall temperature at the mixing pipe with mixer T_3C °C Wall temperature at the mixing pipe with mixer Pressure in the exhaust aftertreatment system P_ADPF mbar Exhaust gas pressure after DPF P_BSCR mbar Exhaust gas pressure before SCR catalyst P_TP mbar Exhaust gas pressure at tail pipe Gaseous emissions NOX_BSCR ppm NOx emissions concentration before SCR catalyst NO_TP ppm NO emissions concentration at tailpipe (TP) NO2_TP ppm NO2 emissions concentration at tailpipe (TP) NOX_TP ppm NOx emissions concentration at tailpipe (TP) N2O_TP ppm N2O emissions concentration at tailpipe (TP) NH3_TP ppm NH3 emissions concentration at tailpipe (TP) HNO3_TP ppm HNO3 emissions concentration at tailpipe (TP) CO2_TP ppm CO2 emissions concentration at tailpipe (TP) H2O_TP % H2O emissions concentration at tailpipe (TP)