AN EXPERIMENTAL STUDY ON ACTIVATED CARBON FIBER FILTERS TO REMOVE INDOOR GASEOUS CONTAMINANTS

摘要

This paper calculated the pore distribution and specific surface area of an activated carbon fiber (ACF). The pore distribution of ACF sample centralized on 7～8 (A), micro-pores (r＜10(A)) were rich, while medium pores(1 0(A)＜r＜250 (A)), especially macro-pores(r＞250 (A)), were a little. The specific surface area was 1224.806 m2/g.Its adsorption curve for N2 was very close to the corresponding desorption curve, and the saturated sorption capacity was 275.3 cm3/g .The results indicated that the micro-pore character of ACF is better than that of granulate activated carbon (GAC). Three type structures (panel, bypass and pleated) of ACF filter were made to test their adsorption performances.Formaldehyde and ammonia were selected as two typical indoor air contaminants, the adsorption performances of filters were tested for various airflow rates and contaminant concentrations using a spectrophotometer. At the meantime, their pressure loss performances and dust efficiencies were also tested. On the whole, the panel type presented obvious superiority;, furthermore, it had the advantages in batch process and cost. The pleated type wasn't adaptive to comfort air-conditioning systems owing to high resistance, nor was the bypass type owing to low efficiency.