"The new air cleaning equipment based on a simple
catalyst successfully processes and removes gaseous materials in cigarette
smoke, which are not easily removed with the existing air cleaning
technologies,"
Researchers say that a new air-cleaning filter can get rid
of all the harmful smoke substances in a room where ten people are
simultaneously smoking in less than an hour.
The filter is coated with a manganese oxide-based nano-catalyst,
which can be used in a smoking room to reduce and purify major harmful
substances of cigarette smoke. The air cleaning equipment based on the
newly-developed catalyst can purify over 80% of the cigarette smoke within 30
minutes and 100% of it within an hour, in a 30 square meter smoking room, where
10 people are smoking simultaneously.
Activated charcoal-based filters are mostly used in a
smoking room to remove gaseous materials from cigarette smoke. However, those
filters are not effective in removing gaseous materials such as acetaldehyde.
Their absorption performance decreases fast in a closed facility such as a
smoking room, and they need to be replaced at least every other week.
The nano-catalyst filter uses a technology that decomposes
elements of cigarette smoke using oxygen radical, which is generated by
decomposing ozone in the air on the surface of the manganese-oxide-based
nano-catalyst filter.
An evaluation test with total volatile organic compounds
(TVOC), such as acetaldehyde, nicotine and tar, which account for the largest
volume of gaseous materials in cigarette smoke, was conducted to evaluate the
performance of the newly-developed catalyst. The results showed that the new
catalyst decomposed over 98% of the harmful substances.
"The new air cleaning equipment based on a simple
catalyst successfully processes and removes gaseous materials in cigarette
smoke, which are not easily removed with the existing air cleaning
technologies," said Dr Jongsoo Jurng of Korea Institute of Science and
Technology (KSIT) in Seoul, who led the study with Dr Gwi-Nam.
"If the new equipment can be simplified and is
economically feasible, it will be an important tool for keeping smoking room
pleasant and clean. Also, from the convergence perspective, the new nanometre
catalyst filter can be integrated with other air cleaning products such as air
purifiers and air conditioners," Jurng said.
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