瑞士的Gratzel与意大利的Pelizzetti发现硫化氢在可见光的照射下被载有氧化钌的硫化镉胶体水悬浮液直接催化分解成氢和元素硫。这个发现具有实用上与经济上的价值,可作为去除石油炼油厂与一些工业操作中所排放出的硫化氢的一种可供采用的新方法。通常从废气中除去硫化氢是很花钱的,需将它转化为硫化钙,但是积集的硫酸钙又会造成二次污染。在新方法中,释放出的氢可作为燃料,定量沉淀出来的硫可以不经处理直接利用,因而有潜在的商业上的利益。 Gratzel in Switzerland and Pelizzetti in Italy found hydrogen sulfide to be directly catalytically decomposed into hydrogen and elemental sulfur by a cadmium sulfide aqueous suspension containing ruthenium oxide under visible light irradiation. This finding is of practical and economic value as a new and available method for removing hydrogen sulfide emitted from petroleum refineries and from some industrial operations. Often it is expensive to remove hydrogen sulfide from the flue gas, converting it to calcium sulfide, but the accumulated calcium sulfate can cause secondary pollution. In the new process, the released hydrogen can be used as a fuel, and the quantitatively precipitated sulfur can be directly utilized without any treatment, thus having potential commercial benefits.