MENG Miaomiao, LIU Yingshu, LI Ziyi, et al. Adsorption characteristics of low concentration gaseous naphthalene on ordered mesoporous carbons[J]. CIESC Journal, 2017, (8): 3109-3118.
MENG Miaomiao, LIU Yingshu, LI Ziyi, et al. Adsorption characteristics of low concentration gaseous naphthalene on ordered mesoporous carbons[J]. CIESC Journal, 2017, (8): 3109-3118.DOI: 10.11949/j.issn.0438-1157.20170079.
Three kinds of ordered mesoporous carbons (OMCs) were used to remove low concentration of polycyclic aromatic hydrocarbons (PAHs)-naphthalene (Nap)
by dynamic adsorption experiments. The adsorption isotherms were fitted with isotherm models (Langmuir
Freundlich
and Sips) and kinetic model based on the assumption of constant concentration wave
respectively. The regeneration performance of the adsorbents were analyzed by means of mass loss curve based on the temperature programmed desorption analysis. The results indicated that the static adsorption behavior of Nap on OMCs can be well predicted by Langmuir and Sips isotherm models (R2 > 99%)
and the adsorption capacity of CMK-5 (1.735 mol·kg-1) is better than that of CMK-3 and FDU-15. The constant-pattern wave propagation model was found to well fit the breakthrough curves. And the existence of mesoporous in the adsorbents facilitated the adsorption mass transfer. With transversal micropores
CMK-5 and FDU-15 showed better regenerabilities
and the desorption activation energy follows the order:CMK-3 > CMK-5 > FDU-15. Based on the analysis of absorption and desorption kinetics
CMK-5 shows better application potential in the three kinds of adsorbents.