Study on Particulates and VOCs Removal with TiO_2 Non-woven Filter Prepared by Electrospinning

摘要

In this study, polyvinyl alcohol (PVA) and titania (TiO_2) Degussa P-25 were mixed to generate TiO_2 non-woven filters using electrospinning. The wires of titanium dioxide and the non-woven binding titania nanofibers were formed using a 14 kV voltage and a distance of 15 cm. A single factor experimental method was used to investigate the effects of parameters such as initial concentration, retention time and light source on acetone removal by non-woven binding titania nanofibers. Furthermore, the effects of parameters such as gas pressure, particle size, initial concentration and retention time on the removal of particulates were also assessed. The results showed that the degradation efficiency increased with increasing initial concentrations. The optimum operating conditions for the removal of acetone using the TiO_2 non-woven filters were a retention time of 100 s, initial acetone concentration of 25 ppm, and UV light source of 254 nm. Under those conditions, 99% acetone removal efficiency was obtained. In addition, 90% particulate matter removal efficiency was reached when the gas pressure was greater than 30 psi and the reaction time was longer than 5 minutes.