Studies on adsorption removal of odorous pollutants (acetaldehyde and methyl mercaptan), adsorption of acetaldehyde on porous adsorbents.

Acetaldehyde has recently been added to the list of chemicals in the control law for offensive odor in Japan, and its concentration in the atmosphere is limited by the law to the range of 0.05 to 0.5ppm1). Acetaldehyde is emitted into the atmosphere particularly from the factories producing acetic acid, vinyl acetate, and chloroprene. It is well known that acetaldehyde irritates the mucous membrane of the eyes, nasal cavity, and pharynx2), and may be formed as a secondary pollutant by photochemical reactions in the atmosphere. Thus far, it has mainly been removed by a wet process1) and by catalytic decomposition with iodine3). In my preceding paper4), I studied the adsorption removal of methyl mercaptan. The