煤层气固体氧化物燃料电池发电性能研究
发布时间：2018-09-17 08:43
【摘要】：煤层气是山西的优势资源,研究开发高效洁净的煤层气利用技术,对山西的产业升级和可持续发展具有重要意义。固体氧化物燃料电池(SOFC)是一种高效洁净的发电装置。镍基陶瓷复合阳极由于其高电化学活性、高电子电导、稳定性好、价格低廉等优点,迄今仍是最常用的阳极材料。然而,当使用碳氢燃料时,阳极积碳导致电池性能迅速衰竭,是煤层气等碳氢燃料SOFC面临的一个严重挑战。经过我们实地考察,走访了山西的一些煤层气开采生产集团,发现目前在实际生产中,30%以下的煤层气不能被很好地利用,绝大部分都已经稀释排空处理,这样不仅造成了环境的污染,温室效应的增加,还极大地浪费了宝贵的资源。本论文针对这种现状,结合固体氧化物燃料电池的新技术,尝试探索出一条针对低浓度煤层气有效利用的新方法。我们通过研究发现,在以25%空气配比的煤层气为燃料时,SOFC电池表现出了很好的化学催化性能和电化学操作稳定性。其中,在850℃下,化学催化过程中CH4的转化率达到了99%以上；电化学稳定性操作方面,在850℃下,电池也能够连续运行168h保持性能基本稳定。同时,无论是化学催化过程还是电化学稳定性操作过程,都没有积碳产生。因此,我们相信,低浓度(≤30%)煤层气有可以直接作为固体氧化物燃料电池的燃料进行使用的价值,在这方面,我们还有很多的工作需要进一步探讨。
[Abstract]:Coalbed methane (CBM) is an advantageous resource in Shanxi Province. It is of great significance to develop efficient and clean CBM utilization technology for the industrial upgrading and sustainable development of Shanxi Province. Solid oxide fuel cell (SOFC) is an efficient and clean generator. Nickel based ceramic composite anode is still the most commonly used anode because of its high electrochemical activity, high electron conductivity, good stability and low price. However, when hydrocarbon fuel is used, anode carbon deposition leads to rapid cell performance failure, which is a serious challenge for SOFC, such as coal-bed methane (CBM) hydrocarbon fuel. After our on-the-spot investigation, we visited some coal-bed methane mining and production groups in Shanxi. It was found that at present, less than 30% of the coal bed methane in actual production cannot be used very well, and most of it has been diluted and emptied. This not only caused environmental pollution, the increase of Greenhouse Effect, but also a great waste of valuable resources. In this paper, a new method for the effective utilization of low concentration coal bed methane (LCBM) has been explored by combining with the new technology of solid oxide fuel cell (SOFC). It is found that the SOFC battery has good chemical catalytic performance and electrochemical operation stability when coal-bed methane (CBM) with 25% air ratio is used as fuel. The conversion of CH4 was over 99% in the process of chemical catalysis at 850 鈩，
本文编号：2245332
[Abstract]:Coalbed methane (CBM) is an advantageous resource in Shanxi Province. It is of great significance to develop efficient and clean CBM utilization technology for the industrial upgrading and sustainable development of Shanxi Province. Solid oxide fuel cell (SOFC) is an efficient and clean generator. Nickel based ceramic composite anode is still the most commonly used anode because of its high electrochemical activity, high electron conductivity, good stability and low price. However, when hydrocarbon fuel is used, anode carbon deposition leads to rapid cell performance failure, which is a serious challenge for SOFC, such as coal-bed methane (CBM) hydrocarbon fuel. After our on-the-spot investigation, we visited some coal-bed methane mining and production groups in Shanxi. It was found that at present, less than 30% of the coal bed methane in actual production cannot be used very well, and most of it has been diluted and emptied. This not only caused environmental pollution, the increase of Greenhouse Effect, but also a great waste of valuable resources. In this paper, a new method for the effective utilization of low concentration coal bed methane (LCBM) has been explored by combining with the new technology of solid oxide fuel cell (SOFC). It is found that the SOFC battery has good chemical catalytic performance and electrochemical operation stability when coal-bed methane (CBM) with 25% air ratio is used as fuel. The conversion of CH4 was over 99% in the process of chemical catalysis at 850 鈩，
本文编号：2245332
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