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Author: search.filters.author.Sricharoenchaikul, ViboonSubject: search.filters.subject.Plastic waste

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    Enhancing Pyrolysis Oil From Landfill Waste Plastic With Industrial Waste Catalyst
    (2026-01-01)
    Aurreethum, Kittipob
    ;
    Sricharoenchaikul, Viboon
    ;
    Kaewpengkrow, Prangtip Rittichote
    ;
    Khemkhao, Maneerat
    This study investigates the production of catalytic pyrolysis oil from 10-year-old landfilled plastic waste in Nonthaburi Province. The study performs pyrolysis of plastic waste using calcined fluid catalytic cracking (FCC) and bottom ash (BA) catalysts, focusing on their potential as alternative fuels. A fixed bed reactor operates at different temperatures 350-500°C, with optimal results achieved at 450°C. The maximum oil yield was achieved at 500 ◦C (47.00 %wt.) and at 450°C with calcined FCC (42.64 %wt.). The maximum heating value reached 45.77 MJ/kg using the BA catalyst. Chemical composition analysis via FT-IR and GC-MS revealed hydrocarbons, primarily alkenes and alkanes. The presence of aromatics and hydrocarbons (C<inf>5</inf> − C<inf>11</inf> and C<inf>12</inf> − C<inf>20</inf>) increased with catalyst use, approaching petroleum fuel properties. The most prevalent composition consisted of hydrocarbons in the C<inf>5</inf> − C<inf>20</inf> range, with a peak area of 84.65 % obtained from pyrolysis at 450°C using the calcined FCC catalyst. Furthermore, the gas products are analyzed using a gas analyzer. High levels of H2 and low levels of CO<inf>2</inf> and SO<inf>2</inf> emissions indicate that the process can produce an alternative fuel while generating fewer greenhouse gases. This research is consistent with the circular economy’s concepts, promoting sustainability and utilized resource efficiency.
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    Induction heating pyrolysis of landfilled plastic waste into valuable hydrocarbon fuels
    (2025-03-01)
    Phongsakun, Kittiphon
    ;
    Chaiyaraksa, Chompoonut
    ;
    Sricharoenchaikul, Viboon
    ;
    Kachapongkun, Pongsakorn
    ;
    Kaewpengkrow, Prangtip Rittichote
    This research investigated the pyrolysis process for plastic waste treatment using induction heating. The induction system involved a coil wrapped around insulated material to generate heat. The plastic waste was sourced from the Refuse-Derived Fuel (RDF) sorting process from a 15-year-old landfill in the province of Nonthaburi, Thailand. The pyrolysis was performed at temperatures ranging from 400 to 600°C with a batch reactor. The highest yield of pyrolysis oil was 27.6% wt. at 600°C. Energy consumption for converting plastic waste into oil ranged between 9.50 and 13.36 kWh, with the highest consumption at 600 °C. The produced pyrolysis oil at 600°C achieved the highest HHV of 41.33 MJ/kg. The GC/MS analysis of the pyrolysis oil revealed an increase in aromatic and hydrocarbons (C5-C11 and C12-C20) with rising temperature. These carbon fractions are suitable replacements for heavy oil or diesel fuel, as low-oxygenated compounds, and hydrocarbon content in pyrolysis oil are desirable. The amount of char produced at 400°C was the highest, with a yield that ranged from 45.2% wt. to 67.0% wt. Moreover, the pyrolysis process has a significant advantage in lowering greenhouse gas emissions (0.21–0.25% vol.), which releases less CO2 than the combustion of plastic waste. The findings therefore suggest that pyrolysis oil, which is produced under optimum conditions, can be used as a substitute liquid fuel in the industrial sector, and is consistent with the circular economy's concepts, promoting sustainability and utilizing resource efficiency.