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首页> 外文期刊>Journal of Fuel Cell Science and Technology >Operating Microtubular SOFCS With Hydrogen Chloride and Hydrogen Sulfide Containing Fuels and Synthetic Wood Gas
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Operating Microtubular SOFCS With Hydrogen Chloride and Hydrogen Sulfide Containing Fuels and Synthetic Wood Gas

机译：使用含氯化氢和硫化氢的燃料和合成木材气运行微管SOFCS

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Solid oxide fuel cells are known to be able to handle a large variety of different fuels. Because of the greenhouse effect the use of carbon dioxide neutral gases or liquids are of special interest. In this context wood-gas has a big potential to be an alternative fuel for solid oxide fuel cells (SOFCs). The gas is generated by a fluidized bed steam gasifier and consists of various components such as 25 Vol % carbon monoxide, 20 Vol % carbon dioxide, 10 Vol % methane, 2.5 Vol % ethylene, 0.5 Vol % propylene, 2 Vol % nitrogen, and the rest hydrogen (values in dry state). The water concentration of the original pyrolysis gas is about 35 Vol %. Besides these main ingredients there are of course many impurities like dust, tars, ammonia, hydrogen sulphide, and hydrogen chloride present in the product gas. Especially the last two ones may lead to degeneration of the fuel cell anode and must therefore be almost totally removed before feeding the gas into the cell. In order to reduce energy losses, hot gas cleaning systems are favored. This, however, limits the possibility to reduce the impurity concentrations to very low levels. Therefore the aim of this work is to define the maximum acceptable output concentrations for the hydrogen chloride adsorber also in combination with hydrogen sulphide, since for a micro-tubular SOFC there are as yet hardly any data available. In order to determine the influence of the hydrogen chloride on the performance of the fuel cell, different concentrations of this impurity were fed to the cell. Here, also the flow rate was changed while the electrochemical output was determined. In addition it was analyzed if there were any effects when changing from pure hydrogen to the HCl containing fuel. This was investigated at 1123 K and 1173 K, which are the preferred working temperatures for our cells. Cooling down as well as heating up procedures were tested with cells between 1173 K and 573 K. In a second series of experiments, combinations of hydrogen chloride and hydrogen sulphide of variable concentrations were tested. As before, changing between pure hydrogen and the acid containing fuel at above given temperatures was analyzed by determining the cell performance. In parallel to the above experiments, synthetic wood gas was used for operating the microtubular fuel cell while monitoring the electrochemical output with time.
机译：已知固体氧化物燃料电池能够处理多种不同的燃料。由于具有温室效应，因此特别关注使用二氧化碳中性气体或液体。在这种情况下，木质气体具有巨大的潜力，可以替代固体氧化物燃料电池（SOFC）。该气体由流化床蒸汽气化炉产生，由各种成分组成，例如25 Vol％一氧化碳，20 Vol％二氧化碳，10 Vol％甲烷，2.5 Vol％乙烯，0.5 Vol％丙烯，2 Vol％氮气和其余的氢（处于干燥状态的值）。原始热解气体的水浓度约为35 Vol％。除了这些主要成分外，产品气体中当然还存在许多杂质，例如灰尘，焦油，氨，硫化氢和氯化氢。特别是最后两个可能会导致燃料电池阳极的退化，因此在将气体供入电池之前必须将其几乎全部去除。为了减少能量损失，热气清洁系统受到青睐。然而，这限制了将杂质浓度降低到非常低的水平的可能性。因此，这项工作的目的是为氯化氢吸附器与硫化氢结合定义最大可接受的输出浓度，因为对于微管SOFC而言，几乎没有可用的数据。为了确定氯化氢对燃料电池性能的影响，将不同浓度的该杂质进料到电池中。在此，在确定电化学输出的同时还改变了流速。此外，分析了从纯氢变为含HCl的燃料时是否有任何影响。在1123 K和1173 K下对它进行了研究，这是我们电池的首选工作温度。使用1173 K和573 K之间的电池测试了冷却和加热程序。在第二系列实验中，测试了浓度可变的氯化氢和硫化氢的组合。如前所述，通过确定电池性能来分析在高于给定温度下的纯氢和含酸燃料之间的变化。与上述实验并行，使用合成木材气体操作微管燃料电池，同时随时间监测电化学输出。

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