微型甲醇水蒸气重整器结构设计研究
发布时间：2018-11-12 12:34
【摘要】：氢能是一种较为理想的高效、清洁的能源,而燃料电池(Fuel Cell)技术又是一种高效利用氢能的技术,其将化学能直接转换为电能,具有很大的应用前景,但氢气原料储存、运输难的问题限制了其发展。近期产生了多种现场制氢方法以解决这一问题,其中较为有效的一种就是重整制氢,而甲醇水蒸气重整又是其中研究最为广泛的一种。目前已有一些关于甲醇水蒸气重整的产品,但所一般多为军用,尺寸较大,成本也很高,小尺寸、便携式的较少。且目前关于甲醇水蒸气重整的研究中,有关重整催化剂或理论模型分析的比较多,关于结构设计的较少。而重整器的结构对其性能的影响是决定性的,因此有必要对此部分进行研究。本文则着手小尺寸的甲醇水蒸气重整器研究,分析研究了国内外甲醇水蒸气重整技术的发展情况、重整催化剂、重整器模型及结构设计的研究情况。采用有限元方法建立了小尺寸甲醇水蒸气重整器的模型,对比分析了多种重整器结构,主要关注甲醇水蒸气重整反应的在其中的进行情况,以提高甲醇转化率、提高氢气选择性、降低CO等副产物的产生量等为目标,优化了重整器结构的设计。制作了模型分析中重整性能较好的重整器,并通过实验对其实际性能进行测试。最终得到的重整器在240℃条件下,进料流速小于0.6ml/min时,甲醇转化率接近100%,进料流速达0.8ml/min时,仍能保持较高的甲醇转化率,最大氢气产生速率超过784ml/min。最后,将所制重整器连接由11节高温质子交换膜燃料电池构成的电堆,让所制重整器为电堆供氢,测试重整器实际应用工作性能。将电堆连接电阻负载,测得使用所设计重整器供氢的电堆可输出3A以上的电流,系统的最大输出功率可达21.87W。
[Abstract]:Hydrogen energy is a kind of ideal high efficiency and clean energy, and (Fuel Cell) technology of fuel cell is a kind of high efficiency utilization technology of hydrogen energy, which converts chemical energy directly into electric energy, and has great application prospect, but hydrogen raw material is stored. The difficulty of transportation limits its development. Recently, a variety of in-situ hydrogen production methods have been produced to solve this problem. One of the more effective is reforming hydrogen production, and methanol steam reforming is one of the most widely studied. At present, there are some methanol steam reforming products, but most of them are military, large size, high cost, small size, less portable. In the current research on methanol steam reforming, there are more reforming catalysts or theoretical models, but less about structural design. The influence of the structure of the reformer on its performance is decisive, so it is necessary to study this part. The development of methanol steam reforming technology, reforming catalyst, reforming model and structure design of methanol steam reforming are analyzed and studied in this paper. The model of small size methanol steam reforming was established by using finite element method, and the structure of many kinds of reformer was compared and analyzed. The main attention was paid to the process of methanol steam reforming in order to improve the conversion rate of methanol. To improve hydrogen selectivity and reduce the production of by-products such as CO, the structure design of the reformer was optimized. The reformer with good reforming performance in model analysis is made and its actual performance is tested by experiment. At 240 鈩，
本文编号：2327117
[Abstract]:Hydrogen energy is a kind of ideal high efficiency and clean energy, and (Fuel Cell) technology of fuel cell is a kind of high efficiency utilization technology of hydrogen energy, which converts chemical energy directly into electric energy, and has great application prospect, but hydrogen raw material is stored. The difficulty of transportation limits its development. Recently, a variety of in-situ hydrogen production methods have been produced to solve this problem. One of the more effective is reforming hydrogen production, and methanol steam reforming is one of the most widely studied. At present, there are some methanol steam reforming products, but most of them are military, large size, high cost, small size, less portable. In the current research on methanol steam reforming, there are more reforming catalysts or theoretical models, but less about structural design. The influence of the structure of the reformer on its performance is decisive, so it is necessary to study this part. The development of methanol steam reforming technology, reforming catalyst, reforming model and structure design of methanol steam reforming are analyzed and studied in this paper. The model of small size methanol steam reforming was established by using finite element method, and the structure of many kinds of reformer was compared and analyzed. The main attention was paid to the process of methanol steam reforming in order to improve the conversion rate of methanol. To improve hydrogen selectivity and reduce the production of by-products such as CO, the structure design of the reformer was optimized. The reformer with good reforming performance in model analysis is made and its actual performance is tested by experiment. At 240 鈩，
本文编号：2327117
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