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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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    Pyrolysis Oil Produced from Landfill Waste Plastic with Calcined Fly Ash Catalyst
    (2024-01-01)
    Aureethum, Kittipob
    ;
    Khemkhao, Maneerat
    ;
    Chumchery, Nipon
    ;
    Kaewpengkrow, Prangtip Rittichote
    This research investigated catalytic pyrolysis fuel oil production from waste plastic sourced from a 10-year-old landfill in Nonthaburi Province. The aim is to study the effect of catalysts on producing pyrolysis fuel oil resembling commercial diesel. A bench-scale fixed bed reactor with an 18.85-liter volume was operated at 450°C, using fly ash waste and calcined fly ash at 600°C and 700°C. The chemical composition of the produced pyrolysis oil was analyzed using Fourier Transform Infrared Spectroscopy (FT-IR) and Gas Chromatography-Mass Spectrometry (GC-MS). Heating values were determined with a bomb calorimeter. The FT-IR spectrum revealed that aliphatic hydrocarbons, especially alkenes, and alkanes, were the main components of the pyrolysis oil. The highest yields were 53.8% from calcined fly ash at 600°C and 37.3% from fly ash at 700°C. The maximum heating value from raw fly ash was 45.77 MJ/kg. The resulting pyrolysis oil can serve as an alternative liquid fuel in industry.
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    Solid waste management by RDF production from landfilled waste to renewable fuel of Nonthaburi
    (2023-09-01)
    Rahothan, Udorn
    ;
    Khemkhao, Maneerat
    ;
    Kaewpengkrow, Prangtip Rittichote
    A worldwide increase in waste production and energy demand as the world's population grows and consumes more resources: therefore, sustainable waste management strategies are important. The goal of this work is to research the guidelines for the appropriate RDF production and landfill waste management of the Nonthaburi province, Thailand. Refuse Derived Fuel (RDF) produced from landfilled Waste (LW) in Nonthaburi was investigated the physicochemical. The following procedure has implemented for the production of LW to RDF of 25 tons/hr of LW; (i) the LW was placed in a pre-shredder, which was followed by a primary crusher; (ii) metals were removed from the waste stream using a magnetic separator; (iii) the LW was transferred using a conveyor belt to a dynamic disc screen, where recyclable waste was separated into smaller sizes less than 80 mm.; (iv) the waste passed through an air separator to reject high-density materials (soil and glass); (v) the undesired material were separated manually, and (vi) the desired material were baled. RDF composition consisted of 78.16-67.93% plastics, 2.29-4.34% rubber, 1.27% wood, 1.53-2.19 % textile, and other (soil-like material) 12.19-26.72%. The proximate and elemental analysis of RDF was determined according to the ASTM method. The moisture content was reduced, and the heating value increased to 18.08-29.41 MJ/kg. The results suggested high carbon and low nitrogen content suitable for energy conversion. The separation can effectively convert LW to RDF, which can be applied as an alternative fuel. Therefore, RDF can contribute to a more sustainable and circular economy.