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首页> 外文期刊>Journal of power sources >Formulating liquid ethers for microtubular SOFCs
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Formulating liquid ethers for microtubular SOFCs

机译：配制用于微管SOFC的液体醚

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One of the key problems of applying solid oxide fuel cells (SOFCs) in transportation is that conventional fuels like kerosene and diesel do not operate directly in SOFCs without prereforming to hydrogen and carbon monoxide which can be handled by the nickel cermet anode. SOFCs can internally reform certain hydrocarbon molecules such as methanol and methane. However, other liquid fuels usable in petrol or diesel internal combustion engines (ICEs) have not easily been reformable directly on the anode. This paper describes a search for liquid fuels which can be mixed with petrol or diesel and also injected directly into an SOFC without destroying the nickel anode. When fuel molecules such as octane are injected onto the conventional nickel/yttria stabilised zirconia (Ni/YSZ) SOFC fuel electrode, the anode rapidly becomes blocked by carbon deposition and the cell power drops to near zero in minutes. This degeneration of the anode can be inhibited by injection of air or water into the anode or by some upstream reforming just before entry to the SOFC. Some smaller molecules such as methane, methanol and methanoic acid produce a slight tendency to carbon deposition but not sufficient to prevent long term operation. In this project we have investigated a large number of molecules and now found that some liquid ethers do not significantly damage the anode when directly injected. These molecules and formulations with other components have been evaluated in this study. The theory put forward in this paper is that carbon-carbon bonds in the fuel are the main reason for anode damage. By testing a number of fuels without such bonds, particularly liquid ethers such as methyl formate and dimethoxy methane, it has been shown that SOFCs can run without substantial carbon formation. The proposal is that conventional fuels can be doped with these molecules to allow hybrid operation of an ICE/SOFC device.
机译：在运输中使用固体氧化物燃料电池（SOFC）的关键问题之一是常规燃料（如煤油和柴油）不能在SOFC中直接运行，而不会预先重整可由镍金属陶瓷阳极处理的氢和一氧化碳。 SOFC可以在内部重整某些碳氢化合物分子，例如甲醇和甲烷。然而，可用于汽油或柴油内燃机（ICE）的其他液体燃料不容易直接在阳极上重整。本文介绍了一种寻找可与汽油或柴油混合并直接注入SOFC而不破坏镍阳极的液体燃料的方法。当将诸如辛烷之类的燃料分子注入到常规的镍/氧化钇稳定的氧化锆（Ni / YSZ）SOFC燃料电极上时，阳极很快会因碳沉积而被阻塞，并且电池电量在数分钟内下降至接近零。可以通过将空气或水注入阳极或在进入SOFC之前进行一些上游重整来抑制阳极的这种退化。一些较小的分子，例如甲烷，甲醇和甲烷酸，会产生轻微的碳沉积趋势，但不足以防止长期运行。在这个项目中，我们研究了许多分子，现在发现当直接注入时，某些液态醚不会显着损害阳极。这些分子和具有其他成分的配方已在这项研究中进行了评估。本文提出的理论是，燃料中的碳-碳键是造成阳极损坏的主要原因。通过测试许多没有这种键的燃料，特别是液体醚（例如甲酸甲酯和二甲氧基甲烷），已证明SOFC可以在不形成大量碳的情况下运行。该提议是常规燃料可以被这些分子掺杂以允许ICE / SOFC装置的混合操作。

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