KMITL

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

Browse

Settings

Author: search.filters.author.Pattiya, AdisakSubject: search.filters.subject.Waste utilization

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Exploration demonstrates high yield and favorable characteristics of crude bio-oil derived by pyrolysis from natural rubber waste for applying as liquid biofuel and value-added product
    (2026-01-01)
    Palamanit, Arkom
    ;
    Ngampak, Supawich
    ;
    Ali, Liaqat
    ;
    Kongto, Pumin
    ;
    Chungcharoen, Thatchapol
    Industrial processing of raw natural rubber (NR) and latex inevitably generates natural rubber waste. The aim of this study was to explore the yield and characteristics of crude bio-oil derived from industrial NR waste, with the goal of further upgrading it to liquid biofuel or other value-added products. Cup lump rubber (CLR) and skim rubber (SR) wastes were pyrolyzed at 400, 450, 500, and 550 °C for 45 min. The results show that pyrolysis of CLR and SR wastes provided crude bio-oils with good yield and very favorable characteristics. The maximum bio-oil yields from CLR and SR wastes were 83 wt.% and 80 wt.%, respectively, achieved at 450 °C. The pH and density of the bio-oil samples were in the ranges of 5.15–9.02 and 885–922.50 kg/m<sup>3</sup>. All the bio-oil samples had a very low water content (< 0.2 wt.%). High carbon and hydrogen contents in the bio-oils led to superior higher heating values (38.3–39.1 MJ/kg). Chemical compounds identified by GC-MS revealed a high content of D-Limonene (C<inf>10</inf>H<inf>16</inf>) at 36.16% in the bio-oil from CLR waste. These results are crucial for further upgrading the bio-oil from industrial CLR and SR wastes, to liquid biofuels or other value-added products.
      2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Coal bottom ash use in traditional ceramic production: evaluation of engineering properties and indoor air pollution removal ability
    (2020-11-01)
    Ongwandee, Maneerat
    ;
    Namepol, Kan
    ;
    Yongprapat, Kamolchai
    ;
    Homwuttiwong, Sahalaph
    ;
    Pattiya, Adisak
    Coal bottom ash (CBA) disposed to landfills causes environmental issues. Thus, we used CBA in traditional clay ceramics that had the triple advantage of consuming troublesome waste, adsorbing volatile organics and being decorative indoors, replacing up to 40% by weight of clay with CBA and firing from 700 to 1300 °C. Clay and CBA mixtures were cast, cured at room temperature for 24 h and fired at several temperatures. Firing temperature impacted linear shrinkage, water absorption and fracture toughness, more strongly than CBA mixing proportion. Above 1000 °C, fracture toughness and water absorption resistance was enhanced but shrinkage increased. However, adding CBA lessened the contraction. SEM confirmed complete sintering as clay particles fused as a rigid solid above 1000 °C. X-ray diffraction patterns of ceramics containing CBA showed crystobalite and labradorite, in addition to quartz, due to flux materials in CBA. Leachability tests showed that the CBA ceramics were not ‘toxic’ on the USEPA TCLP regulatory list. Adsorption of gaseous toluene, a representative indoor pollutant, followed a Freundlich model: CBA made the adsorption sites more homogeneous, reduced the interaction mechanisms on the surfaces and thus the Freundlich exponent. Increased CBA increased toluene adsorption by 2–7 times.