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Thermodynamic and Emission Performance of SOFC-GT Hybrids with Dual Recirculation Strategies
(2026-01-01)
Pholboorn, Suthin
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Patcharavorachot, Yaneeporn
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Saebea, Dang
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Arpornwichanop, Amornchai
Solid oxide fuel cell–gas turbine (SOFC-GT) hybrid systems offer high efficiency and low emissions for sustainable power generation. This study compares two SOFC-GT configurations with different exhaust gas recirculation strategies: SOFC-GT-RAN (anode recirculation) and SOFC-GT-RAB (afterburner recirculation). Both systems were modeled in Aspen Plus using methane with 10% pre-reforming. Parametric analyses were conducted to examine the influence of fuel utilization, steam-to-carbon ratio, SOFC operating temperature, and recirculation ratio on system performance. The results show that SOFC-GT-RAN consistently outperforms SOFC-GT-RAB in terms of power output, efficiency, and CO<inf>2</inf> emissions. At optimal conditions (SOFC temperature = 1173 K, fuel utilization = 0.90, steam-to-carbon ratio = 2.0, anode recirculation ratio = 0.30, afterburner recirculation ratio = 0.10), SOFC-GT-RAN achieved SOFC and net powers of 208.51 kW and 207.47 kW, compared to 156.43 kW and 158.01 kW for SOFC-GT-RAB. Energy and exergy efficiencies were 93.18% and 89.81% for RAN, substantially higher than 70.96% and 68.40% for RAB. Moreover, CO<inf>2</inf> emissions were lower for RAN (205.98 kg/MWh) than for RAB (268.82 kg/MWh). These findings confirm that anode exhaust gas recirculation provides superior technical and environmental performance, highlighting SOFC-GT-RAN as a promising pathway for efficient and clean hybrid power generation.
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Energetic, economic, and environmental perspectives on systematic design and energy management of a power-to-methane system integrated with power cycle
(2025-12-01)
Saebea, Dang
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Arpornwichanop, Amornchai
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Patcharavorachot, Yaneeporn
The methanation process transforms CO<inf>2</inf> into green methane by combining it with hydrogen from solid oxide electrolysis cells (SOECs). Efficient energy management of the integrated system, along with effective heat utilization from methanation for power generation, enhances system efficiency. This study compares four configurations of a system incorporating SOECs, methanation, and the Rankine cycle, focusing on energetic, economic, and environmental performance. The impact of gas recycling in the adiabatic methanator on system performance was also investigated. Key findings reveal that incorporating a water separation unit and increasing the gas recycle ratio significantly improve methane yield and CO<inf>2</inf> utilization. Systems with water removal through heat integration achieve overall efficiencies of 50.17 to 52.27%. The levelized product cost of the system with water removal is lower, ranging from 195.27 to 223.05 $/MWh, and it produces the lowest CO<inf>2</inf> emission intensity at 119.91 kgCO<inf>2</inf> per MWhCH<inf>4</inf>.
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Liquid fuel production from waste tires and water hyacinth: A comparative study of Co-pyrolysis and Co-gasification with Fischer-Tropsch integration
(2025-06-01)
Aentung, Tanawat
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Thongchawee, Anutida
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Patcharavorachot, Yaneeporn
This study investigates the sustainable conversion of waste tires (WT) and water hyacinth (WH) into liquid fuel using two thermochemical approaches: co-pyrolysis (direct method) and co-gasification integrated with Fischer-Tropsch (FT) process (indirect method). Aspen Plus software was employed to determine optimal operating conditions for maximizing fuel yield. The direct method achieved 6649.22 gallons of fuel per day at 400 °C with a WT/WH ratio of 75/25. In comparison, the indirect method, operating at 800 °C with a WT/WH ratio of 50/50, produced 115.92 kmol/h of syngas, which was subsequently converted into 8817.15 gallons of liquid fuel per day via the FT process. An economic analysis revealed that the indirect method offered higher fuel yields and better cost-effectiveness, with a capital investment approximately 5 million U.S. dollars lower than the direct method. These findings highlight the potential of integrating waste-derived feedstocks for efficient and sustainable liquid fuel production.
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Energy analysis and life cycle assessment of furfural and 5-hydroxymethylfurfural integrated biorefinery processes with heat pump-assisted reactive distillation
(2025-03-15)
Wiranarongkorn, Kunlanan
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Im-Orb, Karittha
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Saebea, Dang
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Patcharavorachot, Yaneeporn
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Arpornwichanop, Amornchai
Bio-based products, such as biochemicals and bioenergy, have received considerable attention in efforts to mitigate the effects of climate change. In this study, an integrated biorefinery process for the production of furfural and 5-hydroxymethylfurfural (HMF) using sugarcane bagasse is proposed. Three process scenarios were compared: the integrated process of HMF and furfural production using (i) conventional reactive distillation (RD), (2) heat pump-assisted RD, and (3) heat pump-assisted RD with heat integration. The comparison focused on energy efficiency and life cycle analysis. The simulation results revealed that the overall energy efficiency of the proposed process could increase by 14.5 % with the additional heat pump to the RD column at a pressure ratio of 1.4 due to a reduction of external energy consumption. This improvement reduced the environmental impact of natural gas combustion for utility production. Specifically, the global warming potential of processes involving heat pump-assisted RD without and with heat integration decreased by 16.66 % and 80.08 %, respectively, compared to conventional RD. These results indicate that incorporating heat pump-assisted RD and implementing effective heat management within the integrated biorefinery process significantly decreased external energy consumption, leading to substantial environmental benefits.
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Corrigendum to “Process design and muti-objective optimization of solid waste/biomass co-gasification considering tar formation” [Journal of the Taiwan Institute of Chemical Engineers 164 (2024) 105688](S1876107024003468)(10.1016/j.jtice.2024.105688)
(2025-03-01)
Aentung, Tanawat
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Wu, Wei
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Patcharavorachot, Yaneeporn
The authors regret to correct the title of the article as ‘Process design and multi-objective optimization of solid waste/biomass co-gasification considering tar formation’. The authors would like to apologise for any inconvenience caused.
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Comparative Analysis of Syngas Production via Gasification and Plasma Gasification of Municipal Solid Waste
(2025-01-01)
Sornchai, Atitaya
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Patcharavorachot, Yaneeporn
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Saebea, Dang
Municipal solid waste (MSW) is a significant environmental challenge. Gasification is a process that converts MSW into energy at temperatures ranging from 700 to 1,200 °C. Plasma gasification enhances this process by utilizing a 4,000 °C plasma torch, which helps eliminate hazardous components and produces high-purity syngas. Although plasma gasification requires a considerable amount of energy, it presents a promising pathway for efficiently producing syngas from waste. Thus, this work aims to investigate and compare syngas production between plasma gasification and conventional gasification of municipal solid waste (MSW). The model validation of gasification and plasma gasification was first considered. The effects of air and steam as agents for maximum syngas yield were investigated. Moreover, the system efficiency of both routes is analyzed. The results indicated that the simulation results of syngas production from MSW conventional gasification and plasma gasification are consistent with the experimental data. When considering syngas production from both gasification routes, it was found that the concentrations of hydrogen and carbon monoxide in the syngas from MSW plasma gasification were higher than those from conventional gasification.
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Predictive Modeling and Optimization of Biogas Reforming and Proton-Conducting SOFCs Integrated System
(2025-01-01)
Patcharavorachot, Yaneeporn
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Saebea, Dang
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Arpornwichanop, Amornchai
In this study, the power generation performance of a proton-conducting solid oxide fuel cell (H-SOFC) integrated with biogas steam reforming is investigated to determine the optimal operating conditions. The system design and process simulation are carried out using Aspen Plus. The effects of three key operating parameters - reformer temperature, steam-to-biogas (S/C) molar ratio, and SOFC operating temperature - on electrical performance and CO emissions are examined. Predictive modeling is developed using a Regression Tree to capture the relationship between input parameters and performance indicators. Subsequently, a Genetic Algorithm (GA) is employed to identify the optimal operating conditions that maximize power output and SOFC efficiency while minimizing CO emissions. The results indicate that the optimal reformer temperature is 1024.26 K with an S/C ratio of 1.5, and the H-SOFC should operate at 1024.53 K, yielding a power output of 427.60 kW, an SOFC efficiency of 43.53%, and CO<inf>2</inf> emissions of 226.62 g/kWh. This demonstrates that the integrated system provides a highly efficient and low-carbon power generation solution.
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Performance Analysis of Biomass Gasification with Biogas Co-Feeding for Hydrogen Production
(2025-01-01)
Saebea, Dang
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Patcharavorachot, Yaneeporn
To improve the hydrogen yield in biomass gasification, the addition of biogas for co-feeding with biomass in gasification was proposed in this work. The gasification model developed in Aspen Plus software was validated with experimental data. The performance of biomass gasification with biogas co-feeding using steam as a gasifying agent was investigated. The effect of the steam-to-fuel ratio on the gasification of mixed biomass and biogas was studied. The results show that the simulation results of biomass gasification were consistent with experimental data. Biomass gasification with biogas co-feeding can raise the amount of hydrogen and carbon monoxide in gas products by 22.12% and 18.44%, respectively. Moreover, the increase in the steam-to-fuel ratio enhances hydrogen in syngas. However, the system efficiency decreases with increasing steam-to-fuel ratio.
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Process design and muti-objective optimization of solid waste/biomass co-gasification considering tar formation
(2024-11-01)
Aentung, Tanawat
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Wu, Wei
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Patcharavorachot, Yaneeporn
Background: The co-gasification of solid waste and biomass to produce syngas is an environmentally friendly technology. Unfortunately, the tar formation in the solid waste/biomass co-gasification process would degrade the product gas quality and the overall process efficiency. Methods: In this study, the kinetics of the solid waste/biomass co-gasification is shown by the Aspen Plus simulation. Through the model validation and sensitivity analysis, it is validated that tar yield, syngas composition, and syngas yield are sensitive to gasifier temperature, steam-to-feed ratio (S/F), and blending weight ratio (B/W). It shows that the increase of the product gas yield (GY) increases CO<inf>2</inf> concentration in the product gas, but the tar yield is reduced. To address the sustainable solid waste/biomass co-gasifier, the multi-objective optimization (MOO) algorithm is implemented to maximize GY and minimize CO<inf>2</inf> concentration. For solving the MOO problem, the standard genetic algorithm (GA) coupled with response surface methodology (RSM) is performed to find the Pareto frontier plot, and the technique for order of preference by similarity to the ideal solution (TOPSIS) is used to determine optimal operating conditions. Significant Findings: Under the Pareto frontier plot and TOPSIS, a GY of 2.672 Nm³/kg, CO<inf>2</inf> concentration of 8.045 vol.%, and tar yield of 17.0617 g/Nm³ can be achieved under the optimal conditions of T = 1099.95 °C, S/F ratio = 0.79, and B/W ratio = 10.02. In addition, the CO<inf>2</inf> absorption using CaO is added to purify CO<inf>2</inf> up to 99.999 % of purity.
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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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