以10 W低压汞灯(特征谱线波长,λ=253.7 nm,简称UVC)作为光源,硫化钠的水溶液作为反应介质,进行了UVC直接分解硫化氢制氢反应(简称UVC-H2S-H2)的研究.考察了反应介质中硫的存在形式、硫化钠的浓度、反应介质pH值以及连续通入硫化氢的流量等反应条件对UVC-H2S-H2的影响.实验结果表明,UVC可以在无催化剂条件下直接分解硫化氢制氢.当以0.6 mol/L,硫化钠水溶液为反应介质,以25 mL/h流量连续向反应介质中通入硫化氢时,UVC-H2S-H2产氢速率可达3.0 mL/W·h.
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