Amino-Decorated Activated Carbon Fibers With Efficient Static Adsorptivity For Low-Concentration Formaldehyde Gas In A Confined Space

To 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.