Application of an electrochemical membrane reactor to the thermochemical water splitting IS process for hydrogen production
Application of an electrochemical membrane reactor to the thermochemical water splitting IS process for hydrogen production
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DOI：
10.1016/j.memsci.2004.03.046
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发表时间：
2004-09
影响因子：
9.5
通讯作者：
Mikihiro Nomura;S. Fujiwara;Kazuhiko Ikenoya;S. Kasahara;H. Nakajima;S. Kubo;Gabjin Hwang;Ho-Sang Choi;K. Onuki
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文献类型：
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作者：
Mikihiro Nomura;S. Fujiwara;Kazuhiko Ikenoya;S. Kasahara;H. Nakajima;S. Kubo;Gabjin Hwang;Ho-Sang Choi;K. Onuki
利用电化学膜反应器，成功地采用热化学IS过程中的本生反应（SO2+ I2+ 2H2O = H2SO4+ 2HI）制氢。h2so4和HI分别集中在反应器的阳极侧和阴极侧。在此过程中，i2是回收化学物质的主要主体，通过使用该技术，反应器出口的i2浓度降低了约93%。通过降低i2的浓度，反应的电能消耗降低了约50%，表明在低i2浓度下，IS工艺可以有效地运行。反应4h， HI浓度提高26%。这个量与从总负载电量计算出的值在10%以内相同。为了降低阳极侧的过电位，在阳极侧溶液中加入少量HI。加入HI后，总电压降低0.03V。
The Bunsen reaction (SO2+ I2+ 2H2O = H2SO4+ 2HI) in the thermochemical IS process to produce hydrogen was successfully employed using an electrochemical membrane reactor. H2SO4and HI were concentrated in the anode side and the cathode side of the reactor, respectively. I2is the dominant bulk of the recycling chemicals in this process, and I2concentration at the outlet of the reactor was reduced ca. 93% by using this technique. The electric energy consumption for the reaction was about 50% smaller by reducing the concentration of I2indicating that the IS process can be operate efficiently at low I2concentration. The reaction was carried out for 4h, and the HI concentration was increased by 26%. This amount was the same within 10% as the values calculated from the total loaded electricity. In order to decrease the overpotential at the anode side, small amount of HI was added to the anode side solution. The total voltage was reduced by 0.03V by the addition of HI.