光辐照驱动水-碳低温催化制氢实验研究

Hydrogen making from steam-carbon reaction catalyzed by K_2 CO_3 with light irradiation heating

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。

With the simulated solar reaction system irradiated by Xenon lamp,an experiment of hydrogen making from steam-carbon reaction catalyzed by K2 CO3 w as carried out at about 700 ℃.It is found that the rate of hydrogen production w ith catalysts is 10 times more than that w ithout catalysts,and there is no obvious difference in the rate of hydrogen production w ith the catalyst content from 10% to 20%.The oxygen-transfer mechanism for hydrogen making from steam-carbon reaction catalyzed by K2 CO3 w as discussed in detail,w hich w as 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,w hich is better than that of photovoltaic method（10.85%）.Some approaches for improving the energy conversion efficiency w ere proposed.