A Dynamic Generator of Gaseous Formaldehyde for the Life-span Evaluation of Household Air Cleaners

摘要

Indoor formaldehyde pollution is more and more seriously in China.Household air cleaners or new chemical materials have been developed to reduce indoor formaldehyde pollution.This article aims to develop a stable generator for gaseous formaldehyde for the evaluation of long-time performance of air cleaners.Four experimental cases were carried out to test the performance of the generator.It was found out that the generator has a good performance when the outlet concentrations are in the range of 0.1 to 200 mg/m3.The developed dynamic generator can continuously generate stable gaseous formaldehyde accurately.The response time of the device is about 5 min.The relatively expanded uncertainty for formaldehyde is below 11％.