烟气除硝光催化氧化剂的制备及性能研究  

Preparation and performance research of photocatalytic oxidant for removing NOx in flue gases

作　　者：郑美扬[1] 程温莹[1] 张成江[1] 郑永明[2] 

机构地区：[1]成都理工大学,四川成都610059 [2]中国测试技术研究院,四川成都610021

出　　处：《中国测试》2009年第4期72-75,共4页China Measurement & Test

摘　　要：随着NOx排放量的日益增大,对NOx的控制也迫在眉睫。现有的脱硝技术不是NOx去除效率低就是运行成本昂贵,故开辟新的烟气脱硝技术是非常有实际意义的。而光催化氧化技术却能有效、低成本地对烟气中的NOx进行氧化,再以碱液吸收有效去除被氧化后的烟气中的NOx,并且克服了光催化技术只适合处理低浓度氮氧化物以及碱液吸收法去处效率低等缺点,使传统的烟气脱硝技术焕发出新的生命力。通过研究ZnO、ZrO2、P25、水热法制备ZnO/TiO2等各种光催化剂的制备及催化性能的测试,从NO转化率、催化时间、催化剂成本三个方面比较了所研究光催化剂的催化效果好坏,以便最终找出催化效率高并且价格成本低的除氮光催化剂。研究结果表明,以水热法制得的TiO2中加入ZnO含量为0.1%的催化剂催化效率最高,有一定的工业应用价值。While NOx emissions are increasing, it is extremely urgent for developing NOx control technology. At present, the existing technologies for removing NOx are either low-efficient or high-cost for running. Therefore, it is applicable for developing a new technology to overcome those shortcomings. Photocatalytic oxidation technology is one of them, it can oxidize NOx effectively and low-costly. And lye effectively absorbs NOx produced in oxidation. The photocatalytic technology is only suitable for handling low concentration of nitrogen oxides, and lye places absorption problems in low efficiency and so on, but photocatalytic oxidation technology has overcome those shortcomings. Thus it makes the traditional technologies applicable for removing NOx. In this article, the authors have studied preparation and catalytic performance test for various photocatalysts such as ZnO, ZrO2, P25, ZnO/ TiO2 prepared with hydrothermal method and so on. The catalytic effects of the catalysts have been compared on the bases of three aspects, conversion rate for NO, catalytic time and cost. According to the comparison, the highest effect and lowest cost catalyst should be found. That is TiO2 with 0.1% ZnO, prepared with hydrothermal method, which could be applied in industry.

关 键 词：NOx 光催化氧化 光催化剂 催化效率 

分 类 号：O621.255.4[理学—有机化学] X701.7[理学—化学]