Caveats and technical challenges in performance evaluation of activated carbon (AC) and non-AC filtration for NO2 abatement toward energy-efficient and healthy ventilation
| Autor: | Bing Guo, KwangHoon Han, Jensen S. Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Hazard (logic)
Environmental Engineering Health Toxicology and Mutagenesis Population Air pollution 02 engineering and technology 010501 environmental sciences medicine.disease_cause 01 natural sciences law.invention law HVAC medicine Environmental Chemistry education Process engineering Waste Management and Disposal Filtration 0105 earth and related environmental sciences education.field_of_study business.industry 021001 nanoscience & nanotechnology Pollution Filter (video) Ventilation (architecture) Environmental science 0210 nano-technology business Efficient energy use |
| Zdroj: | Journal of Hazardous Materials. 360:560-570 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2018.08.006 |
| Popis: | As the awareness of public health/safety becomes important and the desire to provide clean/safe indoor air in a sustainable way increases, air filtration technology has become essential at urban built facilities, which are challenged by significant outdoor air pollution due to dense population and heavy traffic. To provide comparable/objective data for designers and professionals of gas-phase filtration equipment in HVAC systems, it is important to understand the performance and characteristics of possible filter medium candidates within a reasonable testing period at low levels of target hazard concentration (typically, ∼0.05 ppm). The present study investigated the 2000-time scale-down evaluation evidence and its behind reasons between practical high-concentration tests (∼100 ppm NO2) and actual low-concentration ones, and investigated potential dangers identified during the study in utilizing activated carbon (AC)-based virgin filter media in indoor applications due to unexpected NO-desorption phenomenon. Six filter media of AC-based and non-AC with different type/pellet/shape/size/target compound were selected and tested for abating NO2 mainly originated outdoors. A multi-channel simultaneous testing system was utilized for similar standard testing conditions. The study findings provide previously unavailable experimental data and new insight into the behavior of widely used filtration media against NO2 for the enhancement of urban resilience. |
| Databáze: | OpenAIRE |
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