Osami NISHIDA*, Hirotsugu FUJITA*, Wataru HARANO* Phong Hai VU*, Hitomi SAITO* and Norihiko TOYOSHIMA*
ABSTRACT
Blending pyrolitic oil (or Waste Plastic Disposal) produced from household and industrial plastic wastes with Marine Heavy Fuel Oil (C-Oil) reduces the viscosity of the heavy oil significantly. The experimental results indicated that, the WPD mixing ratio of 20 vol.% reduces the experimental heavy fuel oil viscosity 90 % from 177 cSt to 20 cSt at 50 ℃. The blended oil has been applied to a small size high speed single-acting 4 stroke diesel engine (16 horsepowers, 2200rpm) without preheating the oil. The experiment on the engine with non-preheated blended oil has proved the stable performance of the engine. This would lead to the significant reduction of fuel heating cost. Although NOx emission slightly increases, the emission of particulate matters (PM), dry soot (DS) and soluble organic fraction (SOF) decreases by half at the mixing ratio of 30 vol.%.
This paper reports the result of application of non-heated WPD-mixed HFO to diesel engines including inspection of the engine performace and exhaust gas characteristics.
2.CHARACTERISTICS OF EXPERIMENTAL OILS
An Ultraviolet ray analyzer (UV-3100PC, Shimazu), an differential thermal gravity analyzer (DTG-50/50H, Shimazu), a X-ray type Sulfur content detector (URA-107) and a GC-Mass spectrometer (LC-VP, Shimazu) were employed to study the experimental oils. Table 1 shows the properties of the marine heavy fuel oil used for experiments. C.Oil's kinematic viscosity at 50 ℃ , density at 15 ℃ and Sulfur content are 177 cSt, 0.982 glcm3 and 2.56 mass % respectively. Table 2 shows the components of WPD. The mains of WPD are styrene radical, which count for 60 % of the fuel volume. The change in the experimental oils' density, kinematic viscosity, CCAI (Calculated Carbon Aromaticity Index) and Sulfur content in respect of WPD mixing ratios are indicated in figure 1 and Ultra-violet ray absorbency of the fuels in figure 2. As shown in figure 1 , except for the slight rise by 3.6 % from 848 to 880 in CCAI value, kinematic viscosity extraordinarily decreases by 90 % from 177 cSt to 19.5 cSt at 50 ℃ at the mixing ratio of 20 %. Density and Sulfur content decline by 2.5 % from 0.978 to 0.953 and by 30 % from 2.27 to 1.57 mass % respectively.
*Kobe University of Mercantile Marine, Department of Marine Engineering System, Energy Engineering Research Laboratory
1-1, 5-Chome, Fukae-Minami-Machi, Higashinada-Ku, Kobe 658-0022, JAPAN
