Imorb, Karittha

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Imorb, Karittha
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Im-orb, Karittha
Im-Orb, Karittha
Im-orb, K.
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Email
karittha.im@kmitl.ac.th

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    Item type:Publication,
    Performance Assessment of Co-Gasification Process for Syngas Production Using Multi-Biomass Feedstocks
    (2026-06-15)
    Wiranarongkorn, Kunlanan
    ;
    Detchusananard, Thanaphorn
    ;
    Piroonlerkgul, Pakorn
    ;
    Im-orb, Karittha
    The investigation focused on alternative energy production from biomass residuals, predominantly located in Northern Thailand, for year-round utilization. The biomass gasification model was created in Aspen Plus. The cassava stalk served as a foundational biomass for blending with additional materials. Increased equivalent ratio (ER) increased syngas yield, while higher gasifying temperatures decreased it. The total energy demand rose with increasing ER, whereas it decreased with higher gasifying temperatures. The gasification process may transition from exothermic to endothermic when the ER exceeds 0.25. The effect of mixing ratio of 1) cassava stalk and 2) rice straw, or 3) cane stalks, or 4) corn stalk at 1:0, 4:1, 3:2, and 2:3 on the gasification performance was investigated. The maximum syngas yield of all mixture cases at each gasifying temperature was achieved at mixing ratio of 2:3 and ER of 0.3. This study discovered blending cassava stalk with seasonal leftovers like rice straw, cane stalks, and corn stalks in a 2:3 ratio generated outstanding syngas year-round in Thailand. For the blended biomass feed rate of 10 kg/h, the maximum syngas yield of 0.356 kmol/h was achieved for the mixture of cassava stalk and rice straw at a gasifying temperature of 900°C.
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    Sustainability analysis of the bio-dimethyl ether (bio-DME) production via integrated biomass gasification and direct DME Synthesis Process
    (2023-05-01)
    Im-orb, Karittha
    ;
    Piroonlerkgul, Pakorn
    The sustainability analysis based on life cycle assessment (LCA) of bio-dimethyl ether (bio-DME) production via an integrated biomass gasification and direct DME synthesis (IBG-DME) process, using oil palm residue as feedstock, was performed. The IBG-DME process was simulated in Aspen plus. Operating at selected condition, the IBG-DME was an exothermic process, whereas for 1 kg h<sup>−1</sup> of oil palm trunk, bio-DME of 0.3456 kg h<sup>−1</sup> and bio-methanol of 0.015 kg h<sup>−1</sup> were produced as main product and by product, respectively, with energy efficiency at 59.5%. The energy consumption increased as gasifying temperature increased and reached thermal self-sufficient condition at approximately 890 °C but the CO<inf>2</inf> emission showed opposite trend. LCA result indicated that the carbon footprint of each unit operation relied on the energy consumption. For biomass gasification section, the global warming potential (GWP) accounted for approximately 91% of the total impact. The DME production section highly contributed toward the ozone depletion potential (ODP), eco-toxicity (ET), and human toxicity-non-carcinogenics (HTNC) whereas the syngas cleaning and conditioning section highly contributed toward GWP, human toxicity potential by ingestion (HTPI), and aquatic toxicity potential (ATP). The endpoint impact on the ecosystem were higher than the human health for all process sections.