**4.11 Comparison of Brake Power and CO2 emission**

CO2 emission increased with increase of brake bower, graphical representaion is shown in Fig 20. There was slight increase in CO2 emission of RBOBD and its blends as compared to diesel. More variation of percentage increase was found within all RBOBD blends at the load 1.89 kW. The overall trend shows that the CO2 emissions are similar to diesel at each load.

Gas-Liquid Process, Thermodynamic Characteristics (19 Blends),

Fig. 21. Comparison of brake power and nitrogen oxides emission

**4.13 Comparison of Brake Power and O2**

Fig. 22. Comparison of brake power and Oxygen

**4.14 Comparison of Brake Power and sound** 

was less (25%) than O2 (9.1) of diesel.

Efficiency & Environmental Impacts, SEM Particulate Matter Analysis… 335

O2 decreased with increase of brake bower, graphical representaion is shown in Fig 22. Deviations (5-10%) were found for RBOBD and its blends. At maximum load, O2 (6.5) in B50

Sound or noise increased with increase of load, graphical representaion is shown in Fig 23. Sound values of RBOBD and its blends are found lower (15-30%) than the sound values of diesel throughout the brake power. Within comparison of RBOBD and its blends, there was not much change in sound in all the loads. The minimum decrease (13.6%) was observed at the minimum load, and the maximum decrease (30%) at the maximum load (3.78 kW). At the higher load, sound reduction (21-30%) for RBOBD and all of its blends compared to diesel.

Fig. 19. Comparison of brake power and carbon monoxide emission

Fig. 20. Comparison of brake power and carbon dioxide emission

#### **4.12 Comparison of Brake Power and NOx emission**

NOx increased with increase of brake power, graphical representaion is shown in Fig 21. There was a reduction (10-55%) of NOx of RBOBD and its blends in comparison with NOx values of diesel in each load. The trend shows that at minimum load, percentage reduction was maximum and at the maximum load, the percentage reduction of NOx was minimum. The percentage reduction of NOx decreased with increase of brake power. NOx values at maximum load (3.78 kW) were found to be: diesel, 942; B80, 858; B50, 782; RBOBD, 753; B20, 677; and B60, 660 ppm. At 3.78 kW, maximum reduction (28%) was found for B20 and minimum (8.9%) for B80.

Fig. 19. Comparison of brake power and carbon monoxide emission

Fig. 20. Comparison of brake power and carbon dioxide emission

NOx increased with increase of brake power, graphical representaion is shown in Fig 21. There was a reduction (10-55%) of NOx of RBOBD and its blends in comparison with NOx values of diesel in each load. The trend shows that at minimum load, percentage reduction was maximum and at the maximum load, the percentage reduction of NOx was minimum. The percentage reduction of NOx decreased with increase of brake power. NOx values at maximum load (3.78 kW) were found to be: diesel, 942; B80, 858; B50, 782; RBOBD, 753; B20, 677; and B60, 660 ppm. At 3.78 kW, maximum reduction (28%) was found for B20 and

**4.12 Comparison of Brake Power and NOx emission** 

minimum (8.9%) for B80.

Fig. 21. Comparison of brake power and nitrogen oxides emission
