Session: 17-08-01: Posters Related to Energy
Paper Number: 98931
98931 - Catalytic Plastic Wastes Pyrolysis Fuel Upgrade/separation and Its Combustion Application in 5kw Boiler
Energy and environmental crises (especially plastic wastes pollution and GHG emissions) have jointly been spawning a new renewable alternative energy sources, derived from huge plastic wastes. In this work, a 20 kg scale vacuum distillation tower was used to separate the plastic pyrolysis fuel into 74 fractions at different AET (atmospheric equivalent temperature). As AET increased, the viscosity and TAN of the separated samples increased whereas the water content decreased. The samples from No.1 to No.25 showed similar properties to gasoline, including carbon range: C6-C11, viscosity range: 0.55-0.72 cSt@ 40 ℃ and HHV: 42-45 MJ/kg. The samples from No.33 to No.48 exhibited kerosene-like properties such as carbon range: C10-C20, viscosity range: 1.07-2.53 cSt@ 40 ℃ and HHV: 44-45 MJ/kg. The samples over No.60 contained heavy waxy content (> C20) with a high viscosity of 3.12-7.55 cSt@ 40 ℃. After separation, the O/C ratio decreased from 0.033 in plastic pyrolysis oil to 0.001 when the H/C ratio increased from 1.90 to 1.96. GC-MS analysis showed two major chemical groups of paraffins (20-40%) and olefins (16-41%) in all fractions. The uniform transparent pictures and FTIR analysis showed a good miscibility of separated samples and diesel. In addition, the light fractions (Nos.1~25) can be further upgraded to naphtha because of their similar chemical compositions. Finally, both characteristics of distillates and the AET conditions can be further used for the design of scale-up vacuum distillation setup for targeting desired products.
In addition, the plastic pyrolysis fuel and diesel blends (100% diesel, 10%, 30% and 50% plastic waste pyrolysis fuel) were prepared. A uniform fuel mixture indicated a good miscibility of the separated pyrolysis oil and petroleum diesel. When the blends were used for combustion experiment in a 5kW boiler, similar combustion and emission performance were observed. The plastic pyrolysis middle oil (diesel-like fraction, C11-C22) was similar to the properties of the diesel (HHV: 45.0 MJ/kg, viscosity: 2.70 cSt at 40 ℃). The efficiency of combustion using 10% and 30% pyrolysis fuel blends showed about 58% at a fuel-air equivalence ratio (Ф) of 0.91, which was similar to that of diesel (58.1%). The highest hot air heater internal temperature was observed at a distance of 2 cm from the swirler (T1), which was about 1060 ℃ (Ф=0.91). Furthermore, the flue gas analysis indicated that the blends and diesel had similar concentrations of CO (about 10-30 ppm) and CO2 (about 11-15 vol.%) depending on the excess air. However, a higher NOx concentration was observed with pyrolysis fuel blends (60-130 ppm) than that of pure petroleum diesel due to its higher nitrogen content in plastic waste pyrolysis fuel. This study suggested that plastic pyrolysis fuel has a good application prospects as an alternative fuel for diesel.
Presenting Author: Doyeon Lee Hanbat National University
Presenting Author Biography: Dr. Lee is an assistant professor at department of civil and environmental engineering, Hanbat National University, Daejeon, South Korea. He received his M.S. and Ph.D. from Korea Advanced Institute of Science and Technology(KAIST) and formerly worked as senior researcher at Korea Institute of Energy Research. His current research topic is about thermochemical conversion of waste resources with fluidization technology.
Authors:
Doyeon Lee Hanbat National UniversityShuang Wang Korea Institute of Energy Research
Byung Wook Hwang Korea Institute of Energy Research
Hyungseok Nam Korea Institute of Energy Research
Catalytic Plastic Wastes Pyrolysis Fuel Upgrade/separation and Its Combustion Application in 5kw Boiler
Paper Type
Poster Presentation