KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/kmitl/1

Browse

Settings

Access type: UnknownAuthor: search.filters.author.Autthanit, Chaowat

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Repurposing Senescent Oil Palm Trunks into Sustainable Plywood: A Green Alternative to Conventional Disposal Practices
    (2026-01-01)
    Rachsiriwatcharabul, Natworapol
    ;
    Dangwilailux, Panya
    ;
    Kalasee, Wachara
    ;
    Autthanit, Chaowat
    ;
    Lakachaiworakun, Putipong
    This study evaluates the mechanical performance and carbon emission implications of producing plywood from senescent oil palm trunks (OPT), a readily available agricultural residue in Thailand. Veneers were dried using hot air at 90℃ and a hybrid hot air–microwave process before being fabricated into plywood with urea–formaldehyde adhesive. Mechanical tests showed that plywood from hybrid-dried veneers (OPP-H90-M2k) achieved higher tensile strength and modulus of rupture (MOR) than hot-air drying alone (OPP-H90), while bondline shear strength remained consistently high. However, MOR and modulus of elasticity values were lower than those of commercial plywood, suggesting that OPT plywood is currently better suited for non-structural interior applications such as furniture and partitions. A simplified carbon emissions inventory indicated that OPT plywood production released about 843 kg CO<inf>2</inf>-eq/m<sup>3</sup>, compared with 990 kg CO<inf>2</inf>-eq/m<sup>3</sup> for open burning and 800– 1,200 kg CO<inf>2</inf>-eq/m<sup>3</sup> for natural decomposition. Although its footprint is higher than advanced low-carbon plywood systems, the results suggest that OPT plywood offers a moderate emissions reduction and provides partial carbon storage within the product. Overall, converting OPT into plywood represents a practical alternative to unsustainable disposal practices and supports more sustainable biomass utilization in tropical agriculture.
      1
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Torrefaction of durian peel in air and N2 atmospheres: Impact on chemical properties and optimization of energy yield using multilevel factorial design
    (2024-09-01)
    Pimsamarn, Jindarat
    ;
    Kaewtrakulchai, Napat
    ;
    Wisetsai, Awat
    ;
    Mualchontham, Jomthong
    ;
    Muidaeng, Nattawut
    This study investigated the torrefaction of durian peel using air and nitrogen as carrier gases. A multilevel factorial design coupled with response surface methodology (RSM) and ANOVA analysis was employed to analyze the impact of torrefaction parameters on chemical properties and energy yield. Durian peel, an agricultural waste product, was torrefied at temperatures ranging from 200 to 320 °C for residence times between 0 and 30 min. Results showed that air torrefaction significantly enhanced thermal decomposition, reducing mass yield from 94.65 % to 30.63 % as the temperature increased from 200 °C to 300 °C with a 30-min holding time. Air torrefaction also increased the higher heating value (HHV) from 19.02 MJ/kg to 35.26 MJ/kg at 300 °C, compared to nitrogen, which achieved a maximum HHV of 32.49 MJ/kg. ANOVA analysis revealed that torrefaction temperature and carrier gas significantly affect energy yield and chemical properties. Air torrefaction positively affected HHV while reducing mass yield compared to nitrogen. Low-temperature air torrefaction showed enhanced energy yield improvement. These findings provided insights for optimizing torrefaction processes enhancing utilization wasted durian peel as a sustainable bioenergy resource.