Chuayboon, Srirat
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Preferred name
Chuayboon, Srirat
Alternative Name
Chuayboon, S.
Main Affiliation
Email
srirat.ch@kmitl.ac.th
8 results
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Item type:Publication, Co-production of syngas and zinc via combined solar-driven biomass gasification and ZnO carbo-thermal reduction in a continuously-operated solar reactor(2018-11-08); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization of Carbon Dioxide Reduction in Biohythane Using an Innovative Water Scrubber(2019-04-09); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A novel high-temperature solar chemical reactor for syngas production from solar-driven thermochemical gasification of wood biomass(2018-11-08); Frayssines, Pierre EricSolar energy is the most abundant renewable energy source on earth and its contribution in the energy mix is growing fast, especially for electricity production via photovoltaic panels and to a lesser extent for concentrated solar energy. However, concentrated solar energy can also provide high temperature heat for process applications. Solar fuels are envisioned as alternative fuels that would enable long term storage and transport of solar energy. Solar thermochemical gasification of lignocellulosic biomass has been investigated in this objective. The use of concentrated solar energy as the external heat source for the high-temperature reaction allows producing high-value syngas with both higher energy conversion efficiency and reduced cost of gas cleaning and separation, while saving biomass feedstock. A 1.5 kW<inf>th</inf> solar reactor was successfully tested for continuous solar driven gasification of millimetric wood particles under real solar irradiation using a parabolic dish concentrator. Investigated temperatures ranged from 1100°C to 1400°C. The influence of temperature, oxidizing agent nature (H<inf>2</inf>O or CO<inf>2</inf>), heating configuration (direct or indirect irradiation), on gas yield and energy conversion efficiency was investigated. The syngas yield drastically increased with the temperature for both steam and CO<inf>2</inf> gasification, while increasing the steam content favored H<inf>2</inf> production over CO. Continuous biomass conversion was demonstrated with a global solar-to-fuel energy conversion efficiency of 26% at 1300°C and a cold gas efficiency as high as 1.16, confirming efficient solar up-grade of the feedstock energy content. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Solar redox cycling of ceria in a monolithic reactor for two-step H2O/CO2 splitting: Isothermal methane-induced reduction versus temperature-swing cycle(2020-12-11); Abanades, StéphaneSolar thermochemical cycles provide an efficient route to convert solar energy into valuable chemical energy carriers, such as solar fuels. The splitting of CO2 and H2O using metal oxide redox pairs permits to produce clean synthetic fuels. Furthermore, CO2 is upgraded into a valuable product (CO) that can be further converted to liquid hydrocarbon fuels when combined with H2. Among the possible candidate materials for two-step redox cycling, ceria appears promising given the high oxygen mobility and exchange property in the crystal lattice offering large amounts of oxygen vacancies (G in CeO2-G) while retaining fluorite structure, rapid and reversible transition between Ce<sup>4+</sup> and Ce<sup>3+</sup> oxidation states, and stable crystal structure during cycling. During a first step at high temperature, the metal oxide (CeO2) is reduced by releasing O2 thus creating oxygen vacancies in the ceria structure. In a second step at lower temperature, the non-stoichiometric oxide (CeO2-G) is re-oxidized with CO2 or H2O, leading to the production of CO or H2 (solar fuels). This temperature-swing operating mode requires high temperatures during the reduction and a temperature gap between the two steps, which impacts the solar-to-fuel efficiency. The use of methane as reducing agent in the reduction step can be used to decrease the reduction temperature and allow isothermal operation. A comparison between the two operating modes, namely isothermal methane-induced reduction versus temperature-swing cycle, was performed in a monolithic solar reactor integrating ceria porous foams. The reduction of ceria using methane results in a higher reduction extent and fuel production with lower cycle temperatures (950-1050°C) at the expense of using a carbonaceous reducer. Thus, the temperature-swing operation appears as a more suitable long-term option for sustainable solar fuel production, but shows more stringent requirements on the reacting materials and solar reactor. The fuel production in the temperature-swing cycle was further increased by decreasing the pressure or increasing the reduction temperature, while the material performance stability was not altered after extended cycling. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Comparative Performance Evaluation of Solar-Driven Methane Reforming with ZnO for Co-Production of Syngas and Metallic Zn(2023-10-06); Abanades, StéphaneSolar-driven methane reforming with ZnO for co-production of hydrogen-rich syngas and metallic Zn was demonstrated in a flexible solar thermochemical reactor prototype fully powered by highly concentrated sunlight under batch and continuous operation. This process provides a practical way to store solar energy into the chemical products while reducing reliance on conventional energy resources that emit CO2 and other pollutants. On-sun experiments were conducted using various operating parameters, including temperature (900-950 °C), pressure (0.15–0.90 bar) and inlet ZnO feeding rate (0.5–1.0 g/min), in both batch and continuous operation, to demonstrate solar reactor flexibility and reliability. The ZnO+CH4 reaction performance between batch and continuous operation was studied and compared. As a result, reducing pressure to vacuum condition improved the net ZnO conversion and lowered side methane cracking reaction, but favored CO2 yield because of insufficient gas residence time. Rising ZnO feeding rate under a constant CH4/ZnO molar ratio of 1.5 promoted Zn and syngas yields. In comparison, continuous operation outperformed batch operation in terms of higher ZnO conversion, higher syngas yield, and reduced methane cracking. Both batch and continuous operation yielded high-purity metallic Zn with a well-crystallized structure and micrometric size particles, thus exhibiting suitable reactor performance for the solar thermochemical methane-driven ZnO reduction process. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental assessment of biomass feedstock gasification in a high-temperature continuous solar gasifier(2019-07-25); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Solar extractive metallurgy for the production of Mg and Zn from carbothermal reduction of MgO and ZnO at low pressure in a solar thermochemical reactor(2022-05-12); Abanades, StéphaneSolar thermochemical pyro-metallurgical process is an attractive prospect for the sustainable conversion of both metal oxides and sunlight into value-added chemicals. In this work, a comparative study of carbothermal reduction of ZnO and MgO was performed in a 1.5 kWth directly-irradiated solar reactor utilizing concentrated sunlight. Important operating parameters were studied during the experiments including the type of carbon reducing agent (activated charcoal and carbon black) in batch and continuous operating modes under both reduced (0.11-0.40 bar) and atmospheric (0.90 bar) pressures in the operating temperature range of 600-1600°C, demonstrating the solar reactor flexibility, reliability, and robustness. As a result, regarding batch tests, a decrease in the total pressure promoted the conversion of ZnO and MgO above 78% and 99%, respectively, which in turn increased Zn and Mg yields. Nevertheless, an increase in the CO2 with decreasing total pressure was observed, especially in the case of ZnO reduction, due to reduced gas residence time. In contrast, CO2 yield remained negligible in the case of MgO. Regarding continuous tests, an increase of gas production yields as well as reaction extent through the increase of reactant feeding rate was highlighted. Employing activated charcoal showed higher conversion of both ZnO and MgO, resulting from the higher available specific surface area for chemical reactions. Finally, high-purity Zn and Mg content in the solar-produced powders were achieved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Analysis of process parameters influence on syngas yields and biomass gasification rates in a continuous particle-fed solar-irradiated gasifier(2020-12-11);