Results from a single grain activated carbon adsorption study indicate that the effective diffusion coefficient was from 0.65×10-6 to 7.4×10-6 cm2/s for H2S in the concentration range of 20-300 ppmv at 23°C for both virgin activated carbon (FAC) and impregnated-regenerative activated carbon (IRAC). The effective diffusivity of the IRAC was nearly two times the FAC for H2S adsorption. The surface reaction of H2S-impregnated regenerative activated carbon was faster than that of H2S and virgin activated carbon. The single grain activated carbon kinetic curve and a time scale conversion method were used to predict the breakthrough curve and the adsorption capacity of the column adsorption system. The single grain activated carbon adsorption system measured the breakthrough curve more efficiently than column adsorption. The prediction error was between 10 and 30%. Improvement can be further achieved by enhanced experimental approaches. It has a great potential for scale-up.
All Science Journal Classification (ASJC) codes
- Materials Science(all)