Experimental and computational study on the mechanism of iodine vapour adsorption by modified activated carbon fibers at different scales

The effective capture of iodine vapour, a potential threat of environment and human health, is crucial for efficiently managing nuclear waste gases. Herein, the adsorption property of iodine vapour on modified activated carbon fibers was investigated using adsorption experiment and simulation methods, to explain the adsorption mechanism at different scales. Preliminary results hint that the ideal adsorbent should have lower density, higher adsorption coefficient and taller poriness, and more pores between 1.6 and 1.9 nm. Compared with KOH modification, microwave modification can effectively improve the performance of activated carbon fibers for capturing iodine vapour.