methanol crossover 中文意思是什麼
methanol crossover
解釋
甲醇穿越-
A mathematical model for the anode of a direct methanol fuel cell ( dmfc ) considering the mass transport in the whole anode compartment and the proton exchange membrane ( pem ), together with the kinetic and ohmic resistance effects through the catalyst layer is developed. the influences of key parameters on methanol crossover and anode performance are investigated
對于dmfc的陽極，本文描述了甲醇和水在陽極及質子交換膜（ pem ）中的傳遞過程、反應動力學和歐姆阻抗效應，建立陽極和pem的數學模型，並探討對甲醇擴散和陽極性能影響的主要因素。 -
Effects of variable methanol inlet concentration and cathode pressure on fuel cell performance and methanol crossover are analyzed
分析了不同進料濃度和陰極壓力對電池性能和甲醇竄流的影響。 -
At first, a two - dimensional across - the - channel mathematical model for simulation of a direct methanol fuel cell is described. the model accounts simultaneously for electrochemical kinetics, hydrodynamics, and multicomponent transport, and fully accounts for the mixed potential effects of methanol oxidation at the cathode as a result of methanol crossover caused by convection, diffusion and electro - osmosis
首先描述了一個用於模擬直接甲醇燃料電池特性的垂直於流道的二維數學模型，模型考慮了多組分傳遞、水動力學和電化學動力學，並且考慮了甲醇竄流在電池陰極產生的混合電位的影響。 -
Simulation results show that cathode over - potential under low current density is considerably increased because of methanol crossover, but its effect becomes much lower under high current density
模型顯示在低放電電流密度下，甲醇穿透顯著地增加了電池陰極過電位，降低了電池電壓；但在高電流密度下，甲醇穿透對電池性能的影響不顯著。 -
At present, methanol crossover from the anode to the cathode has appeared to be a major limitation for dmfc development
甲醇由電池陽極向陰極的滲漏已成為阻礙dmfc發展的一大障礙。 -
Model indicates that, at low current density and high methanol concentration, the methanol crossover poses a serious problem for a dmfc
模型計算顯示，在低電流密度和高濃度甲醇進料情況下，甲醇滲透將成為dmfc的一個嚴重問題。 -
The poor kinetics of anode reaction and methanol crossover in electrolyte are the two key issues hindering dmfc commercial application
然而甲醇在陽極上的氧化速率緩慢及甲醇滲透等問題是用於大功率、高容量電池上的兩大技術難題。 -
The goal of this study is to optimize meas through investigation of factors affecting their performance, with an emphasis on elucidating the effects of methanol crossover
本研究旨在通過實驗和數學模型，研究膜電極的優化方法，解釋甲醇穿透對電池性能的影響。 -
Special attention is paid to the consequences of methanol crossover in cathode reaction and cathode over - potential. good agreement is found between simulations and experiments in regard to the v - i character of dmfcs. based on the theory of parallel electrode reaction, it becomes possible to obtain quantitatively the value of over - potential caused by methanol crossover, which is either implicit or not included in the overall cathode over - potential in previous models
該模型涵蓋了dmfc中的主要物理化學過程，包括：甲醇水溶液在膜電極內的擴散、對流和電遷移；質子在陽極催化劑層和陰極催化劑層內的傳遞；氧氣、水蒸汽在陰極的擴散；陽極催化劑層內的甲醇氧化反應動力學；以及陰極催化劑層內的氧還原和甲醇氧化反應動力學。
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