Patcharavorachot, Yaneeporn

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Patcharavorachot, Yaneeporn
Alternative Name
Patcharavorachot, Y.
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Email
yaneeporn.pa@kmitl.ac.th

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    Design and evaluation of the sorption enhanced steam reforming and solid oxide fuel cell integrated system with anode exhaust gas recirculation for combined heat and power generation
    (2017-01-01)
    Wiranarongkorn, Kunlanan
    ;
    Im-Orb, Karittha
    ;
    Ponpesh, Pimporn
    ;
    Patcharavorachot, Yaneeporn
    ;
    Arpornwichanop, Amornchai
    Solid oxide fuel cell (SOFC) is an electrochemical device for power generation with high efficiency and low environmental impact. Due to a high-temperature operation of SOFC, useful heat can be recovered to enhance its system efficiency. Regarding the environmental concern, bio-oil, the renewable liquid fuel, can be applied to SOFC system. In this study, the SOFC integrated with a steam reforming of bio-oil is considered. A sorption enhanced reforming process is studied for the production of high purity hydrogen for SOFC, and the anode gas recirculation in the SOFC system is proposed for the system improvement. Modeling of such an integrated process is performed using Aspen Plus simulator. As heat and power are generated from the SOFC system, the effect of key design parameters; fuel utilization and recirculation ratio of the anode gas, on a heatto-power ratio is analyzed. The system performance regarding to the electrical and thermal efficiencies is also evaluated. The results show that increasing the anode recirculation ratio increases the combined heat and power (CHP) performance, but increasing the fuel utilization decreases the thermal efficiency. It is also found that the appropriate range of heat-to-power ratio of the system varies from 0.24 to 0.89.
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    Optimization of a membrane-based oxidative coupling of methane reactor using surface response methodology
    (2013-01-01)
    Patcharavorachot, Yaneeporn
    ;
    Tiraset, Sirikarn
    ;
    Saebea, Dang
    ;
    Paengjuntuek, Woranee
    ;
    Arpornwichanop, Amornchai
    An oxidative coupling of methane (OCM) is a promising process to convert methane into ethylene and ethane; however, it suffers from the relatively low selectivity and yield of ethylene at high methane conversion. In this study, a membrane reactor is applied to the OCM process in order to prevent the deep oxidation of a desirable ethylene product. First, simulations of the OCM reactor based on mass and energy balances coupled with detailed OCM kinetic model are performed and effects of key operating parameters, such as temperature, methane-to-oxygen feed ratio and methane flow rate, on the OCM reactor performance in terms of CH<inf>4</inf> conversion, C<inf>2</inf> selectivity and yield are analyzed. To determine its optimal operating conditions, an optimization of the OCM membrane reactor using a surface response methodology is carried out in the second part. The central composite design (CCD) is used to study the interaction of process variables (i.e., temperature, feed flowrate and CH<inf>4</inf>/O<inf>2</inf> ratio) and to find the optimum process operation to maximize the C<inf>2</inf> products yield. © 2013, AIDIC Servizi S.r.l.
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    Exergy and exergoeconomic assessment of sustainable light olefins production from an integrated methanol synthesis and methanol-to-olefins system
    (2022-05-01)
    Detchusananard, Thanaphorn
    ;
    Prasertcharoensuk, Phuet
    ;
    Patcharavorachot, Yaneeporn
    ;
    Maréchal, François
    ;
    Arpornwichanop, Amornchai
    Integrated methanol synthesis and methanol-to-olefins systems are considered attractive and promising technologies to produce light olefins from syngas derived from biomass feedstock. In this study, a flowsheet model of a proposed system was developed and employed for system design and analysis. The system consists of four main parts: methanol synthesis, methanol-to-olefins process, olefins separation, and power plant. The effects of important operating parameters on the exergy efficiency were investigated to determine the optimal operating conditions to achieve the maximum exergy efficiency of this system. The results indicate that the methanol synthesis process should be operated at temperature, pressure, and recycling ratio of 250 °C, 150 bar, and 0.85, respectively, whereas the methanol-to-olefins process should be operated at a temperature of 480 °C and the power plant should be run at steam temperature and steam pressure of 650 °C and 50 bar, respectively. Heat integration based on a pinch analysis was subsequently performed to improve the system energy usage, resulting in a 9.29% increase in the exergy efficiency of the integrated system. An exergoeconomic analysis of the integrated system with the designed heat exchanger network was performed. The results show that the power plant has the highest cost rate of exergy destruction and total cost rate. Moreover, the syngas feedstock cost has the greatest impact on the exergoeconomic indicators; it is necessary to minimize this cost to achieve economic viability of the process for industrial use. The production of light olefins from the integrated methanol synthesis and methanol-to-olefins system using a renewable syngas feedstock has a potential to reduce greenhouse gas emissions due to the use of renewable sources replacing fossil sources.
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    Operational Analysis of a Proton-Conducting Solid Oxide Electrolysis Cell for Synthetic Fuel Production
    (2021-01-01)
    Bhichaiphab, Jinjutha
    ;
    Saebea, Dang
    ;
    Arpornwichanop, Amornchai
    ;
    Patcharavorachot, Yaneeporn
    Methane and methanol as synthetic fuels can be produced from synthesis gas or syngas. A proton-conducting solid oxide electrolysis cell (H-SOEC) becomes a promising technology that can produce syngas from the co-electrolysis of steam and CO<inf>2</inf>. In this work, the synthetic fuel production from syngas produced by a H-SOEC was modelled and simulated through Aspen Plus simulation software. The composition of syngas and synthetic fuel were calculated by using the minimization of Gibbs free energy. Firstly, the steam to CO<inf>2</inf> (S/C) molar ratio in feed was determined to satisty the suitable stoichiometric number of each fuel. Further, the H-SOEC operating temperature was optimized. The simulation showed that at operation of H-SOEC as 650 °C and 1 atm, the optimal S/C molar ratio for methane and methanol productions is 4.69 and 3.52, respectively. Then, the effect of operation in fuel production was examined. The results indicated that methane flowrate of 0.2 kmol/h can be provided when reactor operates at 250 °C and 3 atm. For methanol production, 0.13 kmol/h of methanol can be generated at reactor operation as 250 °C and 80 atm. In addition, it was found that the methane production does not release CO and CO<inf>2</inf> to nature. Therefore, it can be concluded that the integrated system of H-SOEC and methane production is more attractive feature.
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    Modeling and optimization of proton-conducting solid oxide electrolysis cell: Conversion of CO2 into value-added products
    (2016-11-01)
    Namwong, Lawit
    ;
    Authayanun, Suthida
    ;
    Saebea, Dang
    ;
    Patcharavorachot, Yaneeporn
    ;
    Arpornwichanop, Amornchai
    Proton-conducting solid oxide electrolysis cells (SOEC-H<sup>+</sup>) are a promising technology that can utilize carbon dioxide to produce syngas. In this work, a detailed electrochemical model was developed to predict the behavior of SOEC-H<sup>+</sup> and to prove the assumption that the syngas is produced through a reversible water gas-shift (RWGS) reaction. The simulation results obtained from the model, which took into account all of the cell voltage losses (i.e., ohmic, activation, and concentration losses), were validated using experimental data to evaluate the unknown parameters. The developed model was employed to examine the structural and operational parameters. It is found that the cathode-supported SOEC-H<sup>+</sup> is the best configuration because it requires the lowest cell potential. SOEC-H<sup>+</sup> operated favorably at high temperatures and low pressures. Furthermore, the simulation results revealed that the optimal S/C molar ratio for syngas production, which can be used for methanol synthesis, is approximately 3.9 (at a constant temperature and pressure). The SOEC-H<sup>+</sup> was optimized using a response surface methodology, which was used to determine the optimal operating conditions to minimize the cell potential and maximize the carbon dioxide flow rate.
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    Optimization of hydrogen production from three reforming approaches of glycerol via using supercritical water with in situ CO2 separation
    (2019-01-22)
    Patcharavorachot, Yaneeporn
    ;
    Chatrattanawet, Narissara
    ;
    Arpornwichanop, Amornchai
    ;
    Assabumrungrat, Suttichai
    A pathway for hydrogen production from supercritical water reforming of glycerol integrated with in situ CO<inf>2</inf> removal was proposed and analyzed. The thermodynamic analysis carried out by the minimizing Gibbs free energy method of three glycerol reforming processes for hydrogen production was investigated in terms of equilibrium compositions and energy consumption using AspenPlus™ simulator. The effect of operating condition, i.e., temperature, pressure, steam to glycerol (S/G) ratio, calcium oxide to glycerol (CaO/G) ratio, air to glycerol (A/G) ratio, and nickel oxide to glycerol (NiO/G) ratio on the hydrogen production was investigated. The optimum operating conditions under maximum H<inf>2</inf> production were predicted at 450 °C (only steam reforming), 400 °C (for autothermal reforming and chemical looping reforming), 240 atm, S/G ratio of 40, CaO/G ratio of 2.5, A/G ratio of 1 (for autothermal reforming), and NiO/G ratio of 1 (for chemical looping reforming). Compared to three reforming processes, the steam reforming obtained the highest hydrogen purity and yield. Moreover, it was found that only autothermal reforming and chemical looping reforming were possible to operate under the thermal self-sufficient condition, which the hydrogen purity of chemical looping reforming (92.14%) was higher than that of autothermal reforming (52.98%). Under both the maximum H<inf>2</inf> production and thermal self-sufficient conditions, the amount of CO was found below 50 ppm for all reforming processes.
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    Thermodynamic analysis of solid oxide fuel cell system using different ethanol reforming processes
    (2015-06-08)
    Thanomjit, Chollaphan
    ;
    Patcharavorachot, Yaneeporn
    ;
    Ponpesh, Pimporn
    ;
    Arpornwichanop, Amornchai
    In this study, a performance of a solid oxide fuel cell (SOFC) system integrated with different ethanol reforming processes (i.e., steam reforming (SR), partial oxidation (POX) and autothermal reforming (ATR)) is investigated with the aim to determine a suitable ethanol reforming process for the SOFC system. The thermodynamic analysis of the SOFC system operated under steady state conditions was performed using flowsheet simulator. A detailed electrochemical model incorporating all voltage losses (i.e., activation, ohmic and concentration losses) was considered. The simulation results showed that increases in reformer and SOFC temperatures can improve the electrical performance of the SOFC system. The electrical performance of the SOFC-SR is maximized because this reforming process provides the highest hydrogen yield. However, because the SOFC included an internal methane reformation, electrical performances of SOFC systems with different reforming systems are slightly different. When the thermal efficiency was determined, it was revealed that the SOFC-POX system had a higher thermal efficiency with an increasing O/E and decreasing reformer and SOFC temperatures.
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    Biomass gasification of sugarcane leftover for green diesel production
    (2018-01-01)
    Chatrattanawet, N.
    ;
    Kanjanasorn, W.
    ;
    Authayanun, S.
    ;
    Saebea, D.
    ;
    Patcharavorachot, Y.
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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
    ;
    Arpornwichanop, Amornchai
    ;
    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>.