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Biofuel production from pyrolysis oil of fresh palm fruit bunches via atmospheric distillation using a updraft biomass gas stove
(2026-01-01)
Unsomsri, Nathawat
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Koedthong, Patchara
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Tawkaew, Sittinun
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Wiriyasart, Songkran
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Suwannarat, Glinsukol
The increasing demand for sustainable energy sources has driven research into alternative biofuels derived from biomass. One promising approach is the production of liquid biofuels through pyrolysis and subsequent distillation, utilizing renewable heat sources. However, challenges remain in optimizing fuel yield, improving combustion efficiency, and minimizing emissions. This study investigates the production of biogasoline and biodiesel from pyrolysis oil derived from fresh palm fruit bunches using an updraft biomass gas stove as a sustainable heat source. The research evaluates biofuel yields, emissions, and fuel properties to assess the feasibility of biomass-based biofuel production. The results indicate that the system successfully produced 20.2% biogasoline, 26% biodiesel, and 53.8% heavy oil, with compositions similar to conventional fuels. However, CO emissions exceeded standard limits during the initial and final combustion stages, while NO<inf>x</inf> remained within acceptable levels. The total CO<inf>2eq</inf> emissions from wood scrap combustion during distillation were 0.33 kg-CO<inf>2e</inf> per batch. Biodiesel’s higher oxygen content enhances stability but may require upgrading to improve fuel quality. These findings highlight the potential of biomass-based heat integration for biofuel refining.
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Enhancing Pyrolysis Oil From Landfill Waste Plastic With Industrial Waste Catalyst
(2026-01-01)
Aurreethum, Kittipob
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Sricharoenchaikul, Viboon
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Kaewpengkrow, Prangtip Rittichote
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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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Sustainable Production of Biomethanol and Its Environmental Impacts
(2025-01-01)
Detchusananard, Thanaphorn
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Im-Orb, Karittha
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Wiranarongkorn, Kunlanan
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Chen, Yong Song
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Arpornwichanop, Amornchai
Utilizing biomass and biogas sourced from various organic waste materials as renewable feedstocks for biomethanol production offers a sustainable alternative to fossil fuels such as coal, petroleum oil, and natural gas. This chapter provides an exploration of several technologies employed in biomethanol production, including biomass gasification, biomass pyrolysis, and biogas upgrading. Syngas production and conditioning, methanol synthesis and separation, and integrating systems with other renewable energy sources are found to be crucial stages towards achieving sustainable production. The chapter comprehensively evaluates the technical, economic, and environmental aspects of each biomethanol production process. Furthermore, it delves into ongoing efforts to improve and develop biomethanol-production processes to achieve the carbon neutrality goals. The chapter also outlines emerging trends and future research directions in the field of biomethanol production.
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Machine learning based prediction and iso-conversional assessment of oxidatively torrefied spent coffee grounds pyrolysis
(2024-12-01)
Pambudi, Suluh
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Jongyingcharoen, Jiraporn Sripinyowanich
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Saechua, Wanphut
This research focused on developing a predictive model for mass loss during the pyrolysis of oxidatively torrefied spent coffee grounds (SCG) using machine learning techniques. Four algorithms were employed: artificial neural networks (ANN), k-nearest neighbors (k-NN), random forest (RF), and decision tree (DT), with the RF model demonstrating superior performance (R2 > 0.9981, RMSE <1.346) for both training and testing sets. The pyrolysis behavior, kinetics, and thermodynamics of SCG were also investigated using thermogravimetric analysis (TGA) under an inert atmosphere at different heating rates. Higher heating rates in TGA cause T<inf>peak</inf> values to shift to higher temperatures with increased DTG<inf>peak</inf> values, while also resulting in lower T<inf>onset</inf> and higher T<inf>offset</inf>. Kinetic analysis, using the Flynn-Wall-Ozawa (FWO) method, was identified as the most suitable approach for determining activation energy (E<inf>a</inf>), with values ranging from 192.66 to 288.13 kJ mol−1, indicating differences in energy requirements for pyrolysis across samples. Thermodynamic analysis further revealed that both raw SCG and oxidatively torrefied SCG pyrolysis were endothermic reactions. These findings contribute valuable insights into the optimization of biomass conversion technologies, highlighting the potential of machine learning in improving predictive accuracy and efficiency in thermal behavior modeling. This research advances sustainable bioenergy production by promoting the use of SCG, an abundant waste material, as a renewable feedstock in pyrolysis-based processes.
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Co-pyrolysis of biomass/polyurethane foam waste: Thermodynamic study using Aspen Plus
(2024-10-01)
Patcharavorachot, Yaneeporn
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Pradiskhean, Supanat
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Aentung, Tanawat
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Saebea, Dang
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Arpornwichanop, Amornchai
Due to the varieties and identical feature of solid waste, this research aims to consider the use of various feedstocks in pyrolysis process for liquid fuel production. The feedstock considered covers woody and non-woody biomass and plastic waste which are represented by sawdust (SD), palm leaf (PL) and polyurethane foam (PU) waste. In this research, both pure solid waste and the co-pyrolysis of biomass and plastic wastes were determined based on thermodynamics study. The model of pyrolysis process developed through Aspen Plus simulator was implemented to study the product yield, higher heating value (HHV) and energy consumption with a wider range of pyrolysis temperature and blending weight ratio. The simulation results clearly showed that the use of pure PU waste can provide the highest oil yield (∼44 wt%) which is corresponded to highest HHV (∼28 MJ/kg). The pyrolysis, operating at 400 °C, can provide the most significant quantity of oil. For the co-pyrolysis, the results revealed that more PU waste blended in both biomasses can improve both oil yield and HHV while the energy consumption is lower. From the simulation results, the optimal blending weight ratio of biomass and PU waste at 25:75 can provide suitable oil yield (∼43 wt%), HHV (∼26 MJ/kg) and energy consumption (243 kW).
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Polycyclic Aromatic Hydrocarbons Occurrences in Biomass Char and Its Mitigation Approaches: A Mini Review
(2023-08-01)
Mohd Nor Azman, Nur Aina Najwa
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Asmadi, Mohd
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Amin, Nor Aishah Saidina
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Shamjuddin, Amnani
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Mohammad Zainol, Muzakkir
Biochar is a porous fine-grained substance produced from the pyrolysis technology of biomass that can be commercially used as a soil conditioner to promote soil fertility. Biochar is characterized by high carbon content, stability, and porosity. However, organic pollutants residue of polycyclic aromatic hydrocarbons (PAHs) is also formed during the pyrolysis of biochar. The high concentration of PAHs adversely degrades the quality of biochar for soil amendment application. Meanwhile, highly toxic-PAHs concentration may pose a potential threat to both human health and the environment. The total PAHs yield is mainly influenced by the pyrolysis condition and feedstock resource. This review aims to discuss the conversion pyrolysis technology of biochar and factors that may influence the PAHs formation. The key research findings from this literature will lead to some strategies to minimize the PAHs compound in biochar by controlling the pyrolysis conditions through higher pyrolysis temperature, carrier gas flow, and prolonged pyrolysis time or by selecting suitable feedstock with lower lignin content.
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Thermal Behavior of Biomass under Thermochemical Treatment at Different Air Fluxes in an Updraft Reactor
(2023-05-01)
Wasinarom, Kittipass
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Sungworagarn, Sarawut
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Sathitruangsak, Prasan
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Singmai, Wichean
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Onthong, Kasemsil
Thermochemical treatment was investigated experimentally at different air fluxes in an updraft reactor. The test rig was equipped with a special attached door that will open at a specific time step. This unique feature allows investigators to obtain information on the packed bed color variation along the different heights of the reactor that evolves at different points in time. The analysis focused on the temperature dynamics obtained from installed thermocouples with the packed bed color variation at each time step. The investigation was conducted for three different supply air mass fluxes, which were 670, 480, and 190 kg/m2h. The general thermal behavior is addressed in the first part of the paper because it is similar for all different input air mass fluxes. Next, the distinctive operation parameters among different air mass fluxes are discussed; these included the hot spot zone, fuel conversion characteristic, temperature distribution, heat transfer, and kinetic activities along the height of the reactor.
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Process and sustainability analyses of the integrated biomass pyrolysis, gasification, and methanol synthesis process for methanol production
(2020-02-15)
Im-orb, Karittha
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Arpornwichanop, Amornchai
Technical and sustainability analyses of the methanol production via the integrated biomass pyrolysis, gasification, and methanol synthesis (IBPGM) process using rice straw as feedstock, are performed. The utilization of emitted CO<inf>2</inf> by recycling to a gasifier as a gasifying agent is investigated for technical and environmental reasons. The effects of CO<inf>2</inf> recirculation on the product distribution and energy consumption of the IBPGM process are examined. The production rate of methanol is improved with the increased CO<inf>2</inf> recycle fraction, while that of bio-oil does not change. The IBPGM is a highly exothermic process, with the largest energy-releasing unit being the methanol reactor. The energy consumption at the gasifier exhibits the same trend and thermal self-sufficiency is consequently achieved when the recycle fraction is raised to 0.76. Environmental assessment using a life cycle analysis tool reveals that the energy management of methanol synthesis unit and syngas processor needs to be improved as they highly contribute toward the carbon footprint and potential environmental impact. The technical and environmental factors of the IBPGM process are evaluated by the analysis hierarchy process, calculated by a multi-criteria decision analysis method. The IBPGM process with the CO<inf>2</inf> recycle fraction of 0.2 offers the best performance. Under this condition, the methanol and bio-oil production rates of 0.23 and 0.09 kmol h−1, respectively, and the energy efficiency of 60.7% can be achieved, based on the biomass feed rate of 1 kmol h−1.
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Characterization of activated biochar prepared from pineapple waste for metal catalyst support
(2019-01-01)
Kaewtrakulchai, Napat
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Rousset, Patrick
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Eiad-Ua, Apiluck
The utilization of agricultural residues for biochar processing has recently attracted attention due to the potential in many applications. One of the most urgent options for biochar is as a support material used in the catalytic process. In this study, activated biochar which has a high surface area and is inexpensive was prepared from pineapple waste mostly available in the southern and eastern parts of Thailand. The raw pineapple waste was previously carbonized at the desired temperature (400 and 600°C) using different heating rates (7 and 20°Cmin -1 ) and steam was added immediately as an activator. The BET surface area was developed from 0.95 to 228.34 m 2 g -1 by increasing the carbonization temperature with steam activation. A higher carbon percentage was also represented in a high-temperature condition. From the observed results, this new finding hints that the produced activated biochar from pineapple waste showed a beneficial characteristic which is available for use as a metal catalyst support or other functional materials.
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A new method for zone development observation for updraft rice husk gasification
(2019-01-01)
Onthong, Kasemsil
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Charoensuk, Jarruwat
Experiments were carried out with a new method for assessing an updraft gasification reactor. An attached side door enabled the investigation of zone development by stopping air supply at specific times, when the thickness of biomass, char, and ash layers were measured. Development in zone thicknesses of biomass, char, and ash with time associated with temperature distribution provided information about the speed of flame propagation inside the reactor. Initially, pyrolysis and volatile combustion occurred, as evidenced by the high mass loss rate and high growth rate of the char layer. Shrinkage in the char layer took place later, and this phenomenon was governed by char glowing, which was relatively slow in mass loss rate. Finally, the fully developed char layer was obtained. The results from four different air mass fluxes under updraft configuration were presented, showing the differences in layer development. Temperature profiles at each time step revealed that the location of peak temperature coincided with the location of ash-char interface for every air mass flux. This effect was due to the high energy release during the oxidation of fixed carbon.

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