Abstract
AbstractTo develop an absorbent with high removal rate and adsorptivity for low‐concentration formaldehyde (FA) gas, amino‐decorated viscose‐based activated carbon fiber (VACF‐N) was synthesized by ethylenediamine (EDA) grafting process on the surface of viscose‐based activated carbon fiber (VACF). A simulated static adsorption of low‐concentration FA gas in a confined space was used as research target. For 2.45 and 8.15 ppm of FA gas, both the FA removal rate and the adsorptivity of VACF‐N were enhanced significantly after the EDA grafting process. The maximum of FA adsorptivity was 0.59 mg/g (1.92 times that of pristine VACF) for 2.45 ppm FA gases and 1.17 mg/g for 8.15 ppm FA gases. In particular, FA removal rate reached 100 % in only 28 minutes under the static adsorption of 2.45 ppm of FA gas. Predictably, VACF‐N has wide application prospects in the field of low‐concentration FA gas purification in a confined space.
Published Version
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