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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    Comparative exergoeconomic analysis of indirect and direct bio-dimethyl ether syntheses based on air-steam biomass gasification with CO2 utilization
    (2020-10-15)
    Nakyai, Teeranun
    ;
    Patcharavorachot, Yaneeporn
    ;
    Arpornwichanop, Amornchai
    ;
    Saebea, Dang
    Dimethyl ether (DME) is a potential energy source because it is a clean fuel and a crucial intermediate in various chemical productions. The main purposes of this work were to assess and compare the indirect and direct bio-DME syntheses from air-steam biomass gasification with CO<inf>2</inf> utilization using energetic, exergetic, and exergoeconomic analyses. The effects of hydrogen to carbon monoxide (H<inf>2</inf>/CO) and carbon dioxide to carbon monoxide (CO<inf>2</inf>/CO) ratios on DME yield of the indirect and direct processes were firstly investigated. When considering the combined processes, the results were found that the DME yield of the system with direct DME synthesis is higher than that of the indirect system. Moreover, the energy consumption and exergy destruction of biomass gasification and DME synthesis processes in the indirect system are considerably higher when compared to the direct system. For exergoeconomic analysis, the DME unit cost of the direct system (1.66 $/kg DME) also has lower than that of the system with indirect DME synthesis (2.26 $/kg DME). In addition, the CO<inf>2</inf> emission of both systems was also considered. The CO<inf>2</inf> emission intensity of the system with direct DME synthesis shows 32.35% lower than the system with indirect DME synthesis.
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    Predictive Modeling and Optimization of Biogas Reforming and Proton-Conducting SOFCs Integrated System
    (2025-01-01)
    Patcharavorachot, Yaneeporn
    ;
    Saebea, Dang
    ;
    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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    Process Optimization and CO2 Emission Analysis of Coal/Biomass Gasification Integrated with a Chemical Looping Process
    (2023-03-01)
    Sornumpol, Ratikorn
    ;
    Saebea, Dang
    ;
    Arpornwichanop, Amornchai
    ;
    Patcharavorachot, Yaneeporn
    Biomass gasification is an attractive technology and one of the pathways for producing hydrogen. Due to the variable seasons and low calorific value of biomass, the addition of coal in the gasifier is suggested because coal has a high calorific value and carbon-to-hydrogen ratio. In general, the gaseous product obtained in gasification always contains a high amount of carbon dioxide, therefore, the co-gasification of biomass and coal should integrate with the calcium looping carbon dioxide capture process to provide purified hydrogen. In this work, the model of the co-gasification of biomass and coal integrated with the calcium looping carbon dioxide capture process was developed through an Aspen Plus simulator. The developed model was used to analyze the performance of this process. The sensitivity analysis demonstrated that increasing the gasification temperature, steam-to-feed (S/F) ratio, calcium oxide-to-feed (CaO/F) ratio, and regenerator temperature could improve hydrogen production. Next, further optimization was performed to identify the optimal operating condition that maximizes hydrogen production. The results showed that the optimal operating temperature of the gasifier is 700 °C with an S/F mass ratio of 2 and coal to biomass (C/B) mass ratio of 0.75:0.25. However, the carbonator and regenerator temperatures should be 450 °C and 950 °C, respectively, with a CaO/F mass ratio of 3. Under these operating conditions, the maximum H<inf>2</inf> content and H<inf>2</inf> yield can be provided as 99.59%vol. (dry basis) and 92.38 g hydrogen/kg biomass feeding. The other results revealed that the energy efficiency and carbon capture efficiency of this process are 42.86% and 99.99%, respectively, and that the specific emission of released CO<inf>2</inf> is 80.77 g CO<inf>2</inf>/MJ.