Mass spectroscopy for the anode gas layer in a semi-passive direct methanol fuel cell using porous carbon plate: Part II. Relationship between the reaction products and the methanol and water vapor pressures
Mass spectroscopy for the anode gas layer in a semi-passive direct methanol fuel cell using porous carbon plate: Part II. Relationship between the reaction products and the methanol and water vapor pressures
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DOI：
10.1016/j.jpowsour.2009.07.026
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发表时间：
2009-12
影响因子：
9.2
通讯作者：
M. S. Masdar;T. Tsujiguchi;N. Nakagawa
中科院分区：
文献类型：
--
作者：
M. S. Masdar;T. Tsujiguchi;N. Nakagawa
在第一部分之后，采用毛细管探针进行了原位质谱分析，以评估采用多孔碳板（PCP）的半被动直接甲醇燃料电池（DMFC）阳极气体层的气体状况。不同类型的pcp用于DMFC，并研究了除CO2外的中间体甲基甲酸（HCOOCH3）、甲醛（HCHO）和甲酸（HCOOH）的生成情况。这些产品的蒸汽压分布与气层中甲醇和水的蒸汽压有关。每种中间体的产率是甲醇和水蒸气压比（PCH 3 OH/ ph2o）的幂函数，甲甲酸、甲醛和甲酸的幂因子分别为2.07、0.47和- 0.57。根据这些生产率方程，可以定量地估计产品的分布。
Subsequent to Part I, in situ mass spectrometry using a capillary probe was conducted in order to evaluate the gas condition of the anode gas layer of a semi-passive direct methanol fuel cell (DMFC) employing a porous carbon plate (PCP). Different types of PCPs were used for the DMFC, and the production of intermediates besides CO2, ie, methylformate (HCOOCH3), formaldehyde (HCHO) and formic acid (HCOOH), were investigated. The profiles of the vapor pressures of these products were related to the vapor pressure of methanol and water in the gas layer. The production rate of each intermediate was formulated as a power function of the methanol and water vapor pressure ratio, PCH 3 OH/PH 2 O, with the power factors of 2.07, 0.47 and− 0.57 for methylformate, formaldehyde and formic acid, respectively. Based on these equations of the production rates, the product distribution could be quantitatively estimated.