Layered double hydroxides/oxidized carbon nanotube nanocomposites for CO2 capture

A systematic investigation on the influence of synthesis method and chemical composition of LDH/oxidized carbon nanotube (LDH/OCNT) nanocomposites on their CO2 capture performance were performed. Three LDH/OCNT nanocomposites were prepared using two methods: "electrostatic self-assembly" and "direct co-precipitation". All LDH/OCNT nanocomposites were thoroughly characterized. The isothermal CO2 adsorption at different temperatures (60-400 degrees C) and adsorption/desorption cycling tests were conducted. Both the CO2 adsorption capacity and the multi-cycle stability of LDH derived adsorbents were improved by the introduction of OCNT. In particular, the absolute CO2 capture capacity of Mg-Al-NO3 LDH was increased by more than twice by adding 9.1 wt% OCNT. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.