posted on 2020-03-19, 14:42authored byAkira Takahashi, Kimitaka Minami, Keiko Noda, Koji Sakurai, Tohru Kawamoto
Ammonia
adsorbents effective even in trace concentrations are key
to the countermeasure for air pollution of particulate matter caused
by ammonia emission from agriculture sectors. We revealed that Prussian
blue (PB) and its analogues (PBAs), one of the porous coordination
polymers, have higher ammonia adsorption capacity in 10 ppmv of ammonia
(parts per million in volume, 10 ppmv = 0.0001 volume percent), ≥8
times that of conventional adsorbents. Moreover, these compounds can
be recycled only through water flushing. The adsorption capacity of
PBA was restricted to 10 cycles of adsorption/desorption, and the
air sample for the experiment was collected from the composting equipment
present in a swine farm. Despite the presence of saturated water vapor
in the exhaust gas, the adsorbents showed excellent selectivity in
the removal of ammonia from the sample.