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Author: search.filters.author.Arpornwichanop, AmornchaiSubject: search.filters.subject.Biomass gasification

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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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    A Review on the Technical and Economic Prospects of Biofuel Production from Integrated Biomass Gasification and Fischer-Tropsch Processes
    (2020-01-01)
    Im-orb, Karittha
    ;
    Arpornwichanop, Amornchai
    Concerns in energy shortage and the impact of greenhouse gas emissions motivate the production of transportation fuel via a combined biomass gasification (BG) and Fischer-Tropsch (FT) process. This review explains the basic background of the BG-FT process, including the gasification, gas cleaning, and FT processes. Numerous aspects of this process, such as the influence of the feedstock type and characteristics and the processing conditions, efficient process design, and FT-catalyst performance improvement, are reviewed based on laboratory-scale research reported in the literature. The tar removal process used to produce the synthesis gas satisfying the FT specification is also focused in this review. Moreover, the technical and economic prospects of the current BG-FT process to produce transportation fuels are reviewed and compared. Finally, trends in the future research of the BG-FT process are examined.