Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
Modeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses Systems Graduate School of Engineering Kyushu UniversitySUBMITTED TO THE GRADUATE SCHOOL or ENGINEERING IN PARTIAL FULFILLMENT OF THE REQUIREMENTS EOR THE DEGREE or DOCTOR or ENGINEERINGAT THE KYUSHU UNIVERSITY42887Approved by:Assoc .Prof. Yusuke Sliiratori, advisor/examiner Graduate School of Engin Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses eering. Kyushu UniversityProf Kazunari Sasaki, co-examincr Graduate School of Engineering. Kyushu University-Prof. Kohei Ito. co-examiner Graduate SchModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
ool of Engineering. Kyushu University-Prof. Takuya Kitaoka. co-exaniiner Graduate School of Bioresource and Bioenvironmental Sciences. KyushuUniversitModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses , a gaseous mixture of 55-70 vol% CH.| and 30 45 vol% co> obtained from the anaerobic fermentation of organic matters such as garbage, livestock manure and agricultural residues. When the biogas is supplied directly to SOFC, CHj dry and steam reforming simultaneously occur in a porous Ni-based anode Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses material to produce syngas (Methane multiple-reforming (MMR) process). This type of operation is called direct internal reforming (DIR) operation. BiModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
ogas-fuelled D1R-SO1 c is a promising technology for sustainable development of a rural area abundant in biomass resources.1 or the realization of thiModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses ess was a big challenge, hl this study, from the reforming data obtained in the series of systematic experiments using Ni-based anode-supported cells (ASCs). a MMR model (model parameters) was inductively generated using the approach of artificial neural network (ANN), The developed MMR model can pr Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses ovide the net consumption and production rates of gaseous species (CH|, CO;. H;O. H; and CO) involved in the MMR process al arbitrary temperatures andModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
gas compositions. And. it can be applied for different types of Ni-based catalysts by adjusting a correction factor to compensate the differences in Modeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses s occurring inside the cell were taken into consideration, were conducted for the DTR-SOFC fuelled by biogas. Consistency of the CFD calculation incorporating the MMR model developed in this study (MMR model-incorporated CFD) with the measured performance of SOFC fuelled by CH4-CO; mixture was confi Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses rmed through a three-step model validation process consisting of two model-parameter-tuning steps (model fitting steps with the data experimentally obModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
tained under non-DlR and DIR operations) followed by a validity check whether the established-model can reproduce a performance of DIR-SOFC under an aModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses m reforming (ignoring the concurrent effect of COj and ll;O on the catalytic Cll| conversion). The MMR model developed in this study was proved to be able to provide more realistic and meaningful estimations for the DlR-SOFCs.In order to enhance thermomechanical stability and output power of DIR-SOF Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses C fuelled by biogas, internal reforming rales have to be properly controlled. For this purpose, two advanced DIR concepts, with the anode gas-barrierModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
mask (Concept-!) and with the in-cell reformer using paper-structured catalyst (PSC) (Concept-11). were investigated by the MMR model-incorporated CFDModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses m, respectively, were considered, providing guidelines for selecting a proper cell design depending on the thickness of the anode substrate (in other words the amount of metallic Ni) to obtain a mechanically stable operation with higher power density in the direct Iced of simulated biogas mixture (C Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses H4/CO2 - 1) at S00 °C.For both ASC-A and ASC-B. by adopting Concept-! which can control mass flux of fuel getting into the porous volume of the anodeModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
along fuel flow direction, rapid syngas production al the fuel inlet region was suppressed lo have homogeneous temperature distribution over the cell.Modeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses maximum power density for both A SC-A and ASC-B. indicating that the use of anode gas-barrier mask is effective to reduce the risk of electrolyte fracture. Concept-! was confirmed to be a good choice for getting stable operation of D1R-SOFCs.For the feed of 200 ml. min simulated biogas, in the cases Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses of Normal and Concept-I. maximum power densities (P,naji) with thinner anode substrate (ASC-B) were 1.03 and 0.95 w cm ", respectively, lower than thModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
ose with thicker one (ASC-A). 1.17 and 1.08 w cm *. respectively, reflecting that the degree of catalytic CII4 conversion is a predominant factor of tModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses e risk of electrolyte fracture was increased. The effect of Concept-11 was more pronounced for ASC-B with thinner anode substrate, from which H’O (product of the anodic reaction) was easily drained. As a result, buildup of partial pressure of HjO within the anode functional layer under high current Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses densities, leading to the decrease in electromotive force, could be suppressed.This study provided a powertill numerical tool for creating highly effiModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
cient and robust DIR-SOFCs operating with biogas.This dissertation is mainly divided in six parts: overviews of SOFC and conventional modeling approacModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses Chapter 2. hl Chapter 3. detailed description of the ANN 1 IS-based MNFR model is given. CFD model of DTR-SOFC considering MMR and strategy of model validation arc described in Chapter 4. The effectiveness of advanced DIR concepts is discussed in Chapter 5. Finally, important findings and outlook fo Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses r future work arc summarized in Chapter 6.iiiACKNOWLEDGEMENTSThe study was conducted under the excellent supervision of Assoc. Prof. Yiisuke ShiraloriModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
whom 1 gratefully acknowledge for his enthusiasm and many hours of helpful discussion throughout the progress of my thesis.1 wish to express my deep Modeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses uable scientific comments and suggestions in my research. It is an honor for me that he is one of examiners of my thesis.1 am also deeply grateful to Prof. Kohei ilo and Prof. Takuya Kilaoka for being committee members of my thesis.1 would also like to thank Assoc. Prof. Hironori Nakajima and Assisi Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses . Prof. Yuya Tachikawa for their helptill suppons in using COMSỌT. Multiphysics software and valuable discussions on SOI c calculations.1 wish to thanModeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses
k to Prof. Akari Hayashi and Prof. Masamichi Nishihara for then helpful comments and suggestions in my research.1 would like to express my appreciatioModeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy S Modeling of methane multiple reforming in biogas fuelled SOFC and its application to operation analyses an.Modeling of Methane Multiple Reforming in Biogas-Fuelled SOFC and Its Application to Operation AnalysesbyTran Dang LongDepartment of Hydrogen Energy SGọi ngay
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