328
M. Dalal et al.
0
500
1000
1500
2000
0
1
2
3
4
5
6
7
8
9
NOx (ppm)
Brake power (KW)
B0
B05
B10
B20
B10 (plasƟc)
Fig. 7 Brake power versus NO x
For medium and high load, B10 (plastic) had higher NO x emissions than any other
blend. At maximum break power, B0 and B05 had NO x emission of 1591 ppm,
while B10, B20 and B20 (plastic) have 5.09%, 3.16% and 18.76% increase in NO x
emission, respectively.
3.5 Exhaust Gas Recirculation (EGR)
As resulted, plastic pyrolysis oil blended fuel has almost 20% more NO x emission at
high loading conditions. To reduce NO x , 10% and 15% exhaust gas was recirculated
into the manifold for higher loads.
Tables 3 and 4 depict the emission results of EGR done for B10 (plastic) fuel
at 6.8 kW and 8.6 kW brake powers. At brake power 8.6 kW when 10% and 15%
of exhaust gas was recirculated, there was 16.89% and 43.11% deduction in NO x
emission, respectively. Carbon monoxide (CO) emission, however, increased to 0.02
when 15% of exhaust gas was recirculated. CO 2 emission was also increased by
Table 3 Exhaust gas recirculation (EGR) for brake power 6.8 kW
Fuel
B0 diesel
B10 (plastic pyrolysis oil)
EGR
–
0%
10%
15%
BTeff (%)
40.05
23.1
22
22.4
HC (ppm)
5
5
5
5
CO (vol%)
0
0
0.01
0.02
CO 2 (vol%)
5.9
6.05
6.09
7.17
O 2 (vol%)
12.2
11.9
12.1
10.59
NO x (ppm)
1400
1590
1400
935
% decrease in NO x
0
11.949
41.194