Polyacrylonitrile and polyacrylonitrile/cellulose-based activated carbon nanofibers obtained from acrylic textile wastes for carbon dioxide capture

Abstract

The aim of this study is to develop nanofibrous CO2 adsorbents by using of textile wastes as precursor materials. Therefore, polyacrylonitrile (PAN) and PAN/cell nanofibers were produced from acrylic textile wastes. Nanofibrous membranes were subjected to stabilization, carbonization, and chemical activation processes, respectively, to produce activated carbon nanofiber (ACnF) structures. Elemental analysis, scanning electron microscope, FTIR, and Braunauer, Emmett, and Teller analyses were carried out and CO2 adsorption performance was tested. It was observed that all samples, except PAN/cell nanofibers carbonized at 900 degrees C, preserved their nanofibrous structure. PAN ACnFs had a lower surface area; on the other hand, they were shown to have higher carbon dioxide adsorption values compared with PAN/cell ACnFs. Reasonable adsorption capacities as high as 3.53 and 2.99 mmol/g (at 298 K at a relative pressure of 0.989) were achieved by PAN and PAN/cell ACnFs, respectively. As a result, it was investigated that sustainable ACnF-based carbon dioxide adsorbents could be produced by the thermochemical processing of electrospun nanofibers obtained from textile wastes. Activated carbon nanofibers (ACnFs) were produced from PAN and PAN/Cell electrospun nanofibers, in which the PAN fraction was obtained from acrylic textile wastes. Resulting ACnFs were microporous and had reasonable carbon dioxide adsorption performance, which confirmed that sustainable ACnF based CO2 adsorbents from textile waste could be produced as an alternative to available products. image