ASHRAE researches photocatalytic oxidation

ASHRAE researches photocatalytic oxidation

Industry news Filtration+Separation October 2007 Consumer demand drives growth of nonwovens for filtration According to new report Nonwovens In Filt...

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Industry news

Filtration+Separation October 2007

Consumer demand drives growth of nonwovens for filtration According to new report Nonwovens In Filtration Worldwide 2003-2010, legislation and consumer demands will drive the use of nonwovens for filtration in the US and worldwide. In the US, tight government legislation (such as legislation, pm 2.5 legislation) may be the key to expected growth but its enforcement may be another story, the report says. If all industries fully comply with current outlet

ASHRAE researches photocatalytic oxidation ASHRAE plans to look into new ways of analysing by-products from photocatalytic oxidation (PCO) air cleaning devices, thereby improving understanding of the technology. “This research will lead to a new generation of air cleaners that have both low energy operation and low release of chemicals,” said Carolyn Kerr, a member of ASHRAE’s Technical Committee (TC) 2.3, Gaseous Air Contaminants and Gas Contaminant Removal Equipment, which is overseeing the project. “This will assist in providing an optimal indoor environment for buildings, vehicles and facilities for comfort, health and productivity of occupants.” PCO, used for the removal of gaseous contaminants, requires less energy to operate than many existing filter systems, according to Kerr. In the best-case scenario, all of the contaminants removed are converted to non-threatening levels of carbon dioxide and water. However, the contaminant conversion process has the potential to release chemicals that are less desirable than the ones being removed from the air stream, Kerr said. The research will investigate a variety of stand-alone and in-duct air cleaners using PCO technology, challenging them with several airborne contaminants to identify the chemicals released.

emissions, the baghouse/fabric collector and filter bags market could be 100% larger. The residential HVAC market segment in the US will grow 15% annually due to more domestic investment. 105 million households in the US have 80% air conditioning and heating/ forced air systems and will pay between US$3.50 and US$8.50 per filter, at least two times a year rather than the previous $0.90

for glass or polyester material. Currently 18%–23% of all households are expected to use such filter, and this may increase to 60%–70% of all households in 2010. Face masks and medical SMS filter media saw normal growth until earlier in 2003. With SARS however, that changed dramatically with the production of one million masks per day for the last three months in China alone.

The report suggests that the single largest growth area for nonwovens will be China – but the country will not offer the greatest opportunity in all segments of filtration, but rather in selected segments. The single largest issue between now and 2010 will be nanofibre technology and its penetration in many existing markets and applications, along with meltblown, microfibre and lectret nonwovens.