光辐照驱动水-碳低温催化制氢实验研究

在氙灯模拟的太阳光聚光反应系统上,以K₂CO₃作为催化剂进行了700~720 ℃条件下的水-碳低温催化制氢实验。结果表明,催化作用下的产氢速率是未添加催化剂时的10倍,催化剂添加量在10%~20%时反应产氢率没有本质的区别。具体分析了K₂CO₃催化水-碳制氢反应的氧转移机理,并用该机理对反应产物中出现的氢、氧不平衡现象做出了解释。实验中,光能转换化为化学能的效率达到13.12%,优于光伏法制氢效率10.85%。最后对进一步提高能量转换效率提出了可参考的思路。

Hydrogen making from steam-carbon reaction catalyzed by K2CO3 with light irradiation heating

With the simulated solar reaction system irradiated by Xenon lamp, an experiment of hydrogen making from steam-carbon reaction catalyzed by K₂CO₃ was carried out at about 700 ℃. It is found that the rate of hydrogen production with catalysts is 10 times more than that without catalysts, and there is no obvious difference in the rate of hydrogen production with the catalyst content from 10% to 20%. The oxygen-transfer mechanism for hydrogen making from steam-carbon reaction catalyzed by K₂CO₃ was discussed in detail, which was used to explain the unbalanced phenomenon of hydrogen and oxygen in reaction product. The efficiency of light energy conversion to chemical energy reaches to 13.12% in the experiment, which is better than that of photovoltaic method(10.85%). Some approaches for improving the energy conversion efficiency were proposed.