A study on a thermally regenerative fuel cell utilizing low-temperature thermal energy
A study on a thermally regenerative fuel cell utilizing low-temperature thermal energy
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DOI：
10.1016/s0196-8904(01)00042-5
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发表时间：
2001-10-01
影响因子：
10.4
通讯作者：
Takashima, T
中科院分区：
文献类型：
--
作者：
Ando, Y;Tanaka, T;Takashima, T
我们已经提出了一种由低温热能如太阳热能和低温废热操作的热再生燃料电池。它是利用燃料电池的原理，在负极进行2-丙醇脱氢和在正极进行丙酮加氢的化学反应。作为本研究的第一步，我们考察了丙酮的加氢反应。钌和铂复合催化剂的活性（3重量%）负载在碳板上的催化剂在90 ℃下的反应活性远高于钌催化剂或铂催化剂。钌铂复合催化剂以碳毡或碳布为载体时，活性明显高于以平板为载体时。采用碳布负载钌铂复合催化剂作为电池电极，考察了其性能。首先，我们使用分子氢代替2-丙醇作为质子源。在此条件下，开路电压和短路电流分别为104.6 mV和8.98 mA。随着催化剂的负载量变高，短路电流也变大。当催化剂的负载量为5和30重量%时，短路电流为11.5和26.7 mA，分别然后我们使用2-丙醇作为质子源。考察了异丙醇浓度、催化剂用量和反应温度对电池效率的影响。当用水稀释2-丙醇并将其供应到负电极时，表明50-70体积%的2-丙醇浓度对于电池效率是最好的。电池效率随着催化剂负载量的增加而提高。反应温度以80 ℃为宜，有利于提高反应效率。(C)2001爱思唯尔科技有限公司版权所有。
We have proposed a thermally regenerative fuel cell operated by low-temperature thermal energy such as solar thermal energy and low-temperature waste heat. It consists of the chemical reaction of 2-propanol dehydrogenation at the negative electrode and the acetone hydrogenation at the positive electrode by using the principle of a fuel cell. As the first step of this research, we investigated the acetone hydrogenation. Activity of ruthenium and platinum composite catalyst (3 wt.%) supported on a carbon plate for the reaction was much higher than that of ruthenium catalyst or platinum catalyst at 90 degreesC. Activity of ruthenium and platinum composite catalyst was much higher when it was supported on carbon felt or cloth than a plate. We adopted ruthenium and platinum composite catalyst supported on carbon cloth as electrodes of the cell and examined its characteristics. First, we used molecular hydrogen instead of 2-propanol as a proton source. Under this condition, the open-circuit voltage and the short-circuit current were 104.6 mV and 8.98 mA, respectively. As loading of the catalyst became higher, the short-circuit current also became larger. The short-circuit currents were 11.5 and 26.7 mA when loading of the catalyst was 5 and 30 wt.%, respectively. Then we used 2-propanol as a proton source. We investigated effects of 2-propanol concentration, catalyst loading and reaction temperature on the cell efficiency. When 2-propanol was diluted with water and supplied to the negative electrode, it was shown that 2-propanol concentration of 50-70 vol% was the best for cell efficiency. The cell efficiency was improved with increasing catalyst loading. As for reaction temperature, 80 degreesC was better to improve the efficiency. (C) 2001 Elsevier Science Ltd. All rights reserved.