Track: Systems and Equipment
Sponsor: 2.3 Gaseous Air Contaminants and Gas Contaminant Removal Equipment, 5.4 Industrial Process Air Cleaning (Air Pollution Control), 2.4 Particulate Air Contamination and Particulate Contaminant Removal Equipment
Chair: Kyung-Ju Choi, Ph.D., Member, Clean & Science, Louisville, KY
A combination particulate/gas phase filter is capable of controlling primary air pollutants to below levels specified by national air quality standards, as well as removing bacteria, mold and fungi. Since indoor contaminants consist both of particulates and airborne chemicals such as odors, VOCs and SVOCs, both types of filters are needed to treat the air. When dealing with HVAC and air pollution control systems, the pressure drop of a filter should be low while maintaining good airflow, as well as energy savings, throughout the life of the filter.

1. Developments in the Application and Use of Combination Particulate/Chemical Filters for IAQ and Energy Savings
Christopher Muller, Member, Purafil, Filtration Group, Doraville, GA
No single air cleaning technology exists that can solve all IAQ problems. Advances in filtration manufacturing technology have developed a new filter medium that incorporate silver nanoparticles to both standard nonwoven and HEPA media that can control PM10 and PM2.5 along with viable particles. Adding this to a filter element employing granular sorbent media results in a pleatable air filtration medium that can now address essentially all the primary chemical pollutants of concern as well. Products incorporating this combination of filtration technologies can be used in commercial and residential applications, cabin air filtration and masks for personal protection.

2. Development of a Combinatorial Filter for Removing Both Particle and Organic Vapor in Residential Homes:Approach and Challenges
Jianshun Zhang, Ph.D., Fellow ASHRAE, Syracuse University, Syracuse, NY
Particles and gaseous compounds are two major types of indoor air pollutions. This study aimed at developing a low-cost combinatorial filter that could remove both types of pollutants simultaneously. Three type of particle filters were selected and loaded with Fe2O3-MnO2 particles (0.6 to 0.8 μm in particle diameter). The performance test showed that the techniques developed could be used to create combinatorial filters, but none of the tested sorbent media could provide a sufficient removal efficiency or capacity for gaseous pollutants. Further research should be focused on developing more effective catalysts for targeted pollutants for use with combinatorial filters

3. A Combination-Filter for Residential HVAC Filtration
Dennis Glass, 3M, St. Paul, MN
Although some filtration solutions were developed to address the airborne chemical contaminates and household odors, those solutions were either not very effective at removing VOCs or too restrictive to the airflow. We have recently developed a new combination filter which has been proven to be effective at removing both airborne particulates and gaseous pollutants in the residential houses. The new filter is based on the state-of-the-art carbon-loaded-web (CLW) technology which incorporates sorbent particles in the web with polymeric fibers. The new combination filter has excellent particulate and VOC removal performance, very low pressure drop and superior adsorption capacity

4. A Combination Filter Used in Pollution Control Device: Kitchen Ventilation
Derek Schrock, Member, Halton Company, Scottsville, KY
This presentation reviews typical pollution control devices which are utilized for cleaning exhaust air from commercial kitchen ventilation systems. It discusses particulate and vapor phase challenges from commercial cooking processes and then address the equipment that can be selected to help mitigate them, as well as the efficiencies of some of these filtering methods. Emphasis is on removing the components from the airstream, including controlling odor before discharge.

5. Particulate and Gas-Phase Residential Filtration
Thad Ptak, Ph.D., Member, A. O. Smith Corporation, Milwaukee, WI
In order to reduce the health impact and improve IAQ, air cleaning devices must be able to remove particulate matter and gas- phase pollutants. Typical particle removal methods in residential applications are based on various filter media, electrostatic precipitation and combination of both. Gas-phase filtration methods can include sorption, chemical reaction and oxidation. This presentation provides analysis of the current filtration technologies in terms of reducing concentration of the critical air pollutants responsible for DALY losses. Impact of particulate filtration on the performance of selected gas- phases filtration systems will be discussed.

Presented: Wednesday, January 24, 2018, 11:00 AM-12:30 PM
Run Time: 90 min.

This is a zip file that consists of PowerPoint slides synchronized with the audio-recording of the speaker (recorded presentation), PDF files of the slides, and audio only (mp3) for each presentation.