Henschel D Bruce
a Air Pollution Prevention and Control Division , National Risk Management Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , North Carolina , USA.
J Air Waste Manag Assoc. 1998 Oct;48(10):985-994. doi: 10.1080/10473289.1998.10463744.
A cost comparison has been conducted of 1 m/sec indoor air cleaners using granular activated carbon (GAC) versus photocatalytic oxidation (PCO) for treating a steady-state inlet volatile organic compound (VOC) concentration of 0.27 mg/m. The commercial GAC unit was costed assuming that the inlet VOCs had a reasonable carbon sorption affinity, representative of compounds having four or more atoms (exclusive of hydrogen). A representative model PCO unit for indoor air application was designed and costed, using VOC oxidation rate data reported in the literature for the low inlet concentration assumed here, and using a typical illumination intensity. The analysis shows that, for the assumptions used here, the PCO unit would have an installed cost more than 10 times greater, and an annual cost almost seven times greater, than the GAC unit. It also suggests that PCO costs cannot likely be reduced by a factor greater than 2-4, solely by improvements in the PCO system configuration and reductions in unit component costs. Rather, an improved catalyst having a higher quantum efficiency would be needed, increasing reaction rates and reducing illumination requirements relative to the catalysts reported in the literature. GAC costs would increase significantly if the VOCs to be removed were lighter and more poorly sorbed than assumed in this analysis.
已对使用颗粒活性炭（GAC）和光催化氧化（PCO）处理稳态进口挥发性有机化合物（VOC）浓度为0.27毫克/立方米的1米/秒室内空气净化器进行了成本比较。商业GAC装置的成本估算假设进口VOC具有合理的碳吸附亲和力，代表具有四个或更多原子（不包括氢）的化合物。使用本文假设的低进口浓度下文献报道的VOC氧化速率数据，并采用典型的光照强度，设计并估算了一种用于室内空气应用的代表性PCO模型装置。分析表明，对于此处使用的假设，PCO装置的安装成本将比GAC装置高出10倍以上，年度成本几乎高出7倍。这也表明，仅通过改进PCO系统配置和降低单元组件成本，PCO成本不太可能降低超过2至4倍。相反，需要一种具有更高量子效率的改进型催化剂，相对于文献报道的催化剂，提高反应速率并降低光照要求。如果要去除的VOC比本分析中假设的更轻且吸附性更差，GAC成本将显著增加。
