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学者姓名：林毅雄
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Abstract ：
Catalytic distillation is an effective and important technology for low-temperature dehydrogenation of perhydrobenzyltoluene (H12-BT). However, current researches have unfortunately failed to comprehensively understand the reaction and separation processes, hindering the broader application of catalytic distillation dehydrogenation technology. Therefore, in the study, a comprehensive dehydrogenation reaction kinetic model that accounts for the influence of the intermediate H6-BT was established firstly. Subsequently, the vapor-liquid equilibrium data for the binary systems H12-BT + H6-BT and H6-BT + H0-BT was estimated by utilizing the UNIFAC model, so as to obtain the azeotropes. By developing a modified catalytic distillation model, the catalytic distillation dehydrogenation process was examined. Our exploration revealed the existence of an optimal degree of dehydrogenation value, namely 0.8, within the catalytic distillation dehydrogenation process, yielding an approximate 23.8 % reduction in unit H2 production cost in comparison to the fully dehydrogenation case. Our findings contribute valuable insights that have the potential to promote the overall development of the hydrogen energy economy.
Keyword ：
Catalytic distillation Catalytic distillation Degree of dehydrogenation Degree of dehydrogenation Dehydrogenation process Dehydrogenation process Perhydro-benzyltoluene Perhydro-benzyltoluene Reaction kinetic Reaction kinetic
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| GB/T 7714 | Wang, Qinglian , Le, Keyu , Lin, Yi et al. Investigation on catalytic distillation dehydrogenation of perhydro-benzyltoluene: Reaction kinetics, modeling and process analysis [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 482 . |
| MLA | Wang, Qinglian et al. "Investigation on catalytic distillation dehydrogenation of perhydro-benzyltoluene: Reaction kinetics, modeling and process analysis" . | CHEMICAL ENGINEERING JOURNAL 482 (2024) . |
| APA | Wang, Qinglian , Le, Keyu , Lin, Yi , Yin, Wang , Lin, Yixiong , Alekseeva, Maria, V et al. Investigation on catalytic distillation dehydrogenation of perhydro-benzyltoluene: Reaction kinetics, modeling and process analysis . | CHEMICAL ENGINEERING JOURNAL , 2024 , 482 . |
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Abstract ：
CO2 methanation suffers from the problem of temperature runaway phenomenon due to its exothermic nature. To mitigate this issue, optimizing catalyst structure becomes crucial. This work established numerical models to investigate the CO2 methanation reaction and heat/mass transfer process in the reactor with porous pellet and monolithic catalysts. Results show that the reactor with porous pellets has the lowest carbon conversion per unit pressure drop due to its large total pressure drop. In contrast, the reactor with monolith exhibits a much larger carbon conversion per unit pressure drop but a smaller absolute carbon conversion. Based on this, an improved "CHESS" monolith structure was proposed and improved, which not only maintains a high absolute carbon conversion (62.6 %) but also enhances the heat transfer process in CO2 methanation. Moreover, compared with the reactor with porous pellets, the maximum temperature in the improved "CHESS" monolith was decreased by around 11.09 %.
Keyword ：
"CHESS" monolith "CHESS" monolith Heat transfer Heat transfer Monolith Monolith Porous pellet Porous pellet
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| GB/T 7714 | Zhang, Wei , Lin, Yixiong , Zhang, Yuming et al. Regulation of temperature distribution in fixed bed reactor for CO2 methanation through "CHESS" monolith structure catalyst [J]. | APPLIED THERMAL ENGINEERING , 2023 , 236 . |
| MLA | Zhang, Wei et al. "Regulation of temperature distribution in fixed bed reactor for CO2 methanation through "CHESS" monolith structure catalyst" . | APPLIED THERMAL ENGINEERING 236 (2023) . |
| APA | Zhang, Wei , Lin, Yixiong , Zhang, Yuming , Li, Tailin , Li, Jiazhou , Chen, Zhewen et al. Regulation of temperature distribution in fixed bed reactor for CO2 methanation through "CHESS" monolith structure catalyst . | APPLIED THERMAL ENGINEERING , 2023 , 236 . |
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Abstract ：
The extraction of petroleum and natural gas is often accompanied by a large number of associated gases, especially the high CO2 content reservoirs facing the emission of a large amount of CO2. CO2 methanation is recognized as one of the suitable candidates for CO2 utilization to reduce the emission of CO2. Because of the highly exothermic nature of the reaction, however, it is very important to enhance the heat transfer process inside the reactor and inhibit the formation of hot spots. In the fixed bed reactor, the heat transfer in the radial direction is greatly limited compared with that in the axial direction. Thus, this work adopted the radial flow reactor to evaluate the CO2 methanation process by the means of a numerical model based on OpenFOAM. Four types of radial flow reactor con-figurations, namely centrifugal Z-type, centrifugal P-type, centripetal Z-type, and cen-tripetal P-type, were compared. The fluid flow, heat transfer, and reaction performances for these reactors were discussed under consistent operating conditions. Results show that the centrifugal P-type structure has the most uniform flow field. In terms of heat transfer and reaction performance, the centripetal Z-type structure is the best among the four radial flow reactor configurations. These findings provide a theoretical basis and technical guidance for designing and developing radial flow reactors.& COPY; 2023 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.
Keyword ：
CO 2 methanation CO 2 methanation CO 2 utilization CO 2 utilization Highly exothermic reaction Highly exothermic reaction OpenFOAM OpenFOAM Radial flow reactor Radial flow reactor
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| GB/T 7714 | Zhang, Wei , Lin, Yixiong , Norinaga, Koyo . Insights into structure-performance relationship in radial flow fixed bed reactor for CO2 methanation [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (64) : 24594-24606 . |
| MLA | Zhang, Wei et al. "Insights into structure-performance relationship in radial flow fixed bed reactor for CO2 methanation" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 48 . 64 (2023) : 24594-24606 . |
| APA | Zhang, Wei , Lin, Yixiong , Norinaga, Koyo . Insights into structure-performance relationship in radial flow fixed bed reactor for CO2 methanation . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (64) , 24594-24606 . |
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3D flow field design usually improves the performance of proton exchange membrane fuel cell (PEMFC) with the penalty of a dramatically increasing pressure drop. To surmount this issue, a novel windward bend flow field that exhibits superior mass transfer performance under a constant pumping power is proposed in this study. The performance of PEMFC with windward bend flow field is numerically compared with two canonical 3D flow fields, namely 3D wave flow field and cutting cylindrical baffles flow field. Results demonstrated that compared with two canonical 3D flow fields, windward bend flow field gets a better water management capability. The optimal distance, tilt angle and direction for the windward bend structure embedded in channel are 2.0 mm, 15 degrees (at the direction of the front section of the windward bend structure tilts towards membrane electrode assembly). Furthermore, the average enhancement rate of the maximum power density of PEMFC with optimal windward bend flow field is 7.6 % and 12.4 % compared with cutting cylindrical baffles flow field and 3D wave flow field owing to the larger Sherwood number of optimal windward bend flow field under the specified pumping power range.
Keyword ：
PEMFC PEMFC Pumping power Pumping power Structure optimization Structure optimization Water management Water management Windward bend structure Windward bend structure
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| GB/T 7714 | Sun, Yun , Lin, Yixiong , Wang, Qinglian et al. Novel design and numerical investigation of a windward bend flow field for proton exchange membrane fuel cell [J]. | ENERGY , 2023 , 290 . |
| MLA | Sun, Yun et al. "Novel design and numerical investigation of a windward bend flow field for proton exchange membrane fuel cell" . | ENERGY 290 (2023) . |
| APA | Sun, Yun , Lin, Yixiong , Wang, Qinglian , Yang, Chen , Yin, Wang , Wan, Zhongmin et al. Novel design and numerical investigation of a windward bend flow field for proton exchange membrane fuel cell . | ENERGY , 2023 , 290 . |
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Metal foam flow field shows great potential for next-generation proton exchange membrane (PEM) fuel cell of high power density due to its well-connected pore structure, high thermal and electrical conductivity. However, the complicated pore structure makes it a challenge for water management. To tackle this issue, a novel design of metal foam flow field with hierarchical pore structure was proposed. Based on lattice Boltzmann method (LBM), the structure-performance relationship between hierarchical pore structure and water discharge capability of flow field was explored by using breakthrough time. Furthermore, an optimal hierarchical pore structure for metal foam flow field that shows superior water discharge capability was obtained. Compared with metal foam with uniform coarse pore structure, breakthrough time can be reduced roughly by 17.6% in the one with optimal hierarchical pore structures. This finding provides a theoretical foundation and technical guidance for developing metal foam flow field.
Keyword ：
hierarchical pore structure hierarchical pore structure lattice Boltzmann method (LBM) lattice Boltzmann method (LBM) metal foam flow field metal foam flow field proton exchange membrane (PEM) fuel cell proton exchange membrane (PEM) fuel cell water discharge capability water discharge capability
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| GB/T 7714 | Lin, Yixiong , Sun, Yun , Yang, Chen et al. Liquid water discharge capability enhancement of hierarchical pore structure in metal foam flow field of proton exchange membrane fuel cell [J]. | AICHE JOURNAL , 2023 , 70 (1) . |
| MLA | Lin, Yixiong et al. "Liquid water discharge capability enhancement of hierarchical pore structure in metal foam flow field of proton exchange membrane fuel cell" . | AICHE JOURNAL 70 . 1 (2023) . |
| APA | Lin, Yixiong , Sun, Yun , Yang, Chen , Zhang, Wei , Wang, Qinglian , Wan, Zhongmin et al. Liquid water discharge capability enhancement of hierarchical pore structure in metal foam flow field of proton exchange membrane fuel cell . | AICHE JOURNAL , 2023 , 70 (1) . |
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