Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Sidheswaran, Meera; Destaillats, Hugo; Sullivan, Douglas P.; Larsen, Joern T.; Fisk, William J.

doi:10.1016/j.apcatb.2011.06.032

Cited by 88 publications

(59 citation statements)

References 31 publications

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“…Researchers have evaluated the effectiveness of air cleaning technologies on the removal of volatile organic compounds (VanOsdell et al 1996;Zhang et al 2003), formaldehyde (Sidheswaran et al 2011), and particles (Fisk et al 2002;Waring et al 2008). We used gaseous air cleaners to simultaneously reduce pollutant concentrations and ventilation rates given their potential to decrease energy use.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Ventilation Energy Demands and Indoor Air Quality in the ZEBRAlliance Homes

Hun¹,

Shrestha²,

Jackson

2013

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Section: Introductionmentioning

confidence: 99%

Optimization of Ventilation Energy Demands and Indoor Air Quality in the ZEBRAlliance Homes

Hun¹,

Shrestha²,

Jackson

2013

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“…The reported concentrations of VOCs and formaldehyde from the upstream and downstream samples are the averages from the four measurements, one from each test day. The experimental methods were very similar to those described in greater detail in (Sidheswaran, Destaillats et al 2011). …”

Section: Evaluation Of Strategies For Increasing Contaminant Decomposmentioning

confidence: 79%

“…• A new manganese oxide catalyst (Sidheswaran, Destaillats et al 2011, Sidheswaran, Destaillats et al 2011a) developed by Lawrence Berkeley National Laboratory (LBNL) was deposited on a fibrous particle filter, with a few grams of catalyst per square meter of filter media. The catalyst is a powder that adheres to the filter through Van der Waals forces and tests indicate that it stays attached to the filter.…”

Section: Air Cleaning Technologiesmentioning

confidence: 99%

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Integrated Technology Air Cleaners (ITAC): Design and Evaluation

Fisk¹

2013

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The primary objective of this project was to design, build, and test an air cleaner for residential use with the potential to substantially improve indoor air quality, or maintain indoor air quality unchanged, when outdoor air ventilation rates are reduced to save energy. Two air cleaners were designed and fabricated. The design targets for airflow rate, fan power, and projected cost were met. In short term laboratory studies, both units performed as expected; however, during field studies in homes, the formaldehyde removal performance of the air cleaners was much lower than expected. In subsequent laboratory studies, incomplete decomposition of some indoor air volatile organic compounds, with formaldehyde as a product of partial decomposition of volatile organic compounds, was confirmed as the explanation for the poor formaldehyde removal performance in the field studies. The amount of formaldehyde produced per unit of decomposition of other volatile organic compounds was substantially diminished by increasing the amount of catalyst on the filter and also by decreasing the air velocity. Together, these two measures reduced formaldehyde production, per unit destruction of other volatile organic compounds, by a factor of four, while increasing the removal efficiency of volatile organic compounds by a factor of 1.4. A company with a southern California office is conducting studies in conjunction with Lawrence Berkeley National Laboratory, with the goal of incorporating the ITAC catalytic air cleaning technology in their future commercial products.

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“…We selected three technologies for VOC removal. For System C, we specified inclusion of a recently developed (by LBNL) manganese oxide catalyst that oxidizes formaldehyde and other VOCs at room temperature (Sidheswaran at al., 2011). For System D, the intent was to use a chemisorbent that removes formaldehyde (and potentially also nitrogen dioxide) in addition to other VOCs.…”

Section: S13 Selection Of Components To Meet Design Objectivesmentioning

confidence: 99%

Measured performance of filtration and ventilation systems for fine and ultrafine particles and ozone in an unoccupied modern California house

et al. 2016

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This study evaluated nine ventilation and filtration systems in an unoccupied 2006 house located 250m downwind of the I-80 freeway in Sacramento, California. Systems were evaluated for reducing indoor concentrations of outdoor particles in summer and fall/winter, ozone in summer, and particles from stir-fry cooking. Air exchange rate was measured continuously. Energy use was estimated for year-round operation in California. Exhaust ventilation without enhanced filtration produced indoor PM 2.5 that was 70% lower than outdoors. Supply ventilation with MERV13 filtration provided slightly less protection whereas supply MERV16 filtration reduced PM 2.5 by 97-98% relative to outdoors. Supply filtration systems used little energy but provided no benefits for indoor-generated particles. Systems with MERV13-16 filters in the recirculating heating and cooling unit (FAU) operating continuously or 20 min/h reduced PM 2.5 by 93-98%. Across all systems, removal percentages were higher for ultrafine particles and lower for black carbon, relative to PM 2.5 . Indoor ozone was 3-4% of outdoors for all systems except an electronic air cleaner that produced ozone. Filtration via the FAU or portable filtration units lowered PM 2.5 by 25-75% when operated over the hour following cooking. The energy for year-round operation of FAU filtration with an efficient blower motor was estimated at 600 kWh/year. KEYWORDSResidential filtration, PM 2.5 , Ultrafine particles, Black carbon, Residential ventilation PRACTICAL IMPLICATIONSThis study quantitatively demonstrates the potential for advanced filtration to reduce in-home exposures to outdoor air pollutants through engineered systems. It also demonstrates that high quality filtration is required on supply ventilation systems to achieve the same reductions of outdoor particles as exhaust ventilation in a moderately airtight home. Results from this work should help inform the setting of filtration requirements for high performance home standards and building codes.

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Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Cited by 88 publications

References 31 publications

Optimization of Ventilation Energy Demands and Indoor Air Quality in the ZEBRAlliance Homes

Optimization of Ventilation Energy Demands and Indoor Air Quality in the ZEBRAlliance Homes

Integrated Technology Air Cleaners (ITAC): Design and Evaluation

Measured performance of filtration and ventilation systems for fine and ultrafine particles and ozone in an unoccupied modern California house

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