A Combined Suspended Titania Reactor and Filtration System for Photocatalytic Oxidation of Airborne Volatile Organic Compounds

用于光催化氧化空气中挥发性有机化合物的组合悬浮二氧化钛反应器和过滤系统

• 批准号: 9461630
• 负责人: Richard Higgins
• 金额: $ 7.5万
• 依托单位: CeraMem Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1996-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9461630&HistoricalAwards=false
• 关键词: Combined; Suspended; Titania; Reactor; Filtration

Due to the environmental and health-related hazards of airborne VOC emissions, Federal regulations will require improved VOC control technologies. Photocatalytic oxidation using UV illuminated titania catalysts has demonstrated the capability of destroying a wide range of organics, in particular halogenated compounds. Many bench scale reactor designs have been tested and show promise in some applications but are characterized by relatively poor light utilization and limited air treatment capacities. The proposed reactor design, which incorporates a suspended catalyst reactor combined with a ceramic filtration system for catalyst recycle, is very easily scaleable to high flow rates found in many VOC applications. The reactor design is a simple plug flow reactor in which suspended titania catalyst is periodically illuminated in the presence of VOC contaminated air. The suspended titania particulates are filtered using chemically durable, high efficiency, backpulsable ceramic filters which have a very high packing density. The resulting systems are very compact and allow the recycle of high activity suspended catalysts back to the photocatalytic reactor.

由于机载VOC排放的环境和健康相关的危害，联邦法规将需要改进的VOC控制技术。使用紫外线照明二氧化钛催化剂的光催化氧化已经证明了破坏广泛的有机物，特别是卤化化合物的能力。许多基准尺度反应堆设计已经进行了测试并在某些应用中显示出希望，但其特征是光利用率相对较差和空气处理能力有限。拟议的反应堆设计结合了悬浮的催化剂反应器，并结合了用于催化剂回收的陶瓷过滤系统，非常容易地伸缩到许多VOC应用中的高流速。反应堆设计是一种简单的塞流动反应器，其中悬浮的钛催化剂在有VOC污染的空气的情况下会定期照亮。使用化学耐用，高效率，可背脉冲过滤器过滤悬浮的钛颗粒物，其堆积密度很高。所得的系统非常紧凑，可以使高活性悬浮催化剂的回收回到光催化反应器中。