国外超临界水氧化技术的研究现状

超临界水氧化是水处理技术发展的新方向,但该技术对设备的要求比较高,工业化应用仍有一定的难度。为了克服这一难题,目前的研究工作主要集中在催化剂的选择以及设备防腐蚀等方面。介绍了贵金属类催化剂、过渡金属类催化剂、碱金属盐类催化剂、杂聚酸类催化剂以及碳基类催化剂,在降解不同污染物时的催化效率。在反应器材质和反应器形式的研究中,分别对铁、镊、铬等纯金属以及不同材料的合金在各种条件下的防腐蚀性能作了比较;两种最新的反应器形式:可蒸发壁式反应器和流动式反应器。它们在超临界水氧化中表现出了良好的防腐能力。

Present research status of overseas supercritical water oxidation

Supercritical water oxidation is a new direction of water treatment technology development,however,as the technology put forward high requirements to equipments,it still can hardly be applied in industry.To solve the problem,the current research focus on aspects of catalysts selection and equipments anti-corrosion.The catalytic efficiency of nobel-metal catalysts,transition metal catalysts,alkali metal catalysts,heteropolyacids catalysts and carbon-based catalysts when degrading different pollutants were introduced.In the study of material and type of reactor,the anti-corrosion performances of some pure metals such as: iron,nickel,chrome and some alloys made of different materials were compared,the results showed that,the latest two kinds of reactors: transpiring wall reactor and floating reactor showed good anti-corrosion ability in supercritical water oxidation process.