首页> 外文期刊>Building and Environment >Impact of design parameters on the performance of ultraviolet photocatalytic oxidation air cleaner
【24h】

Impact of design parameters on the performance of ultraviolet photocatalytic oxidation air cleaner

机译:设计参数对紫外光催化氧化空气净化器性能的影响

获取原文
获取原文并翻译 | 示例
           

摘要

Ultraviolet photocatalytic oxidation (UV-PCO) is regarded as one of the promising technologies for air purification. Previous studies on UV-PCO of ethanol were performed in an ideal bench top reactors. However, this research is focused on UV-PCO of ethanol in full-scale open test rig which closely resembles the real application of this technology. Ethanol mineralization was investigated under several conditions including two types of UV-lamps (UVC and VUV) for two different photocatalysts under varied concentrations, airflow rate and relative humidity. In each case, removal efficiency and by-products yield were compared. Furthermore, possible mechanism for by-product formation is presented. Experimental results show that acetaldehyde and formaldehyde are the main by-products of ethanol. VUV lamps increase photocatalytic oxidation of ethanol compared to UVC lamps. The increase of relative humidity decreases UV-PCO of ethanol using both VUV and UVC lamps; however, the yield of by-products in the presence of VUV lamps increases while it decreases in the presence of UVC lamps. Higher flow rate results lower removal efficiency and consequently formation of less by-products. Improvement of reaction section by increasing the number of reactors leads to higher ethanol removal efficiency, less partial oxidation, lower amount of by-products and the complete mineralization of acetaldehyde.
机译:紫外线光催化氧化(UV-PCO)被认为是有希望的空气净化技术之一。先前对乙醇的UV-PCO的研究是在理想的台式反应器中进行的。但是,这项研究的重点是在大规模开放式试验台上对乙醇的UV-PCO,这与该技术的实际应用极为相似。在几种条件下研究了乙醇的矿化作用,包括两种类型的紫外线灯(UVC和VUV),用于两种不同浓度,气流速度和相对湿度的光催化剂。在每种情况下,都比较了去除效率和副产物产率。此外,提出了副产物形成的可能机理。实验结果表明,乙醛和甲醛是乙醇的主要副产物。与UVC灯相比,VUV灯增加了乙醇的光催化氧化作用。相对湿度的增加降低了使用VUV和UVC灯的乙醇的UV-PCO。但是,在使用VUV灯的情况下,副产物的收率增加,而在使用UVC灯的情况下,副产物的收率下降。较高的流速导致较低的去除效率,因此形成较少的副产物。通过增加反应器数量来改善反应区,可以提高乙醇去除效率,减少部分氧化,减少副产物的量,并使乙醛完全矿化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号