This study investigated the removal characteristic of CO2 by a porous nitrogen doped biochar (AMBC) bead sorbent. The AMBC beads possessed a well -developed pore structure with a high specific surface area of 328.6 m(2) g(-1), which is very helpful for CO2 adsorption. In the adsorption tests carried out using a lab -scale fixed -bed column, the CO2 removal performance was further improved by increasing the porosity and the specific surface area of the sorbent. The synthesized AMBC beads exhibited a very high CO2 removal capacity of 10.15 mmol g(-1)at 20 degrees C, which is much higher than that of commercial activated carbon and other adsorbents. The CO2 adsorption capacity of the AMBC bead was maintained at 85% of the initial bead adsorption capacity even after 10 adsorption desorption recovery cycles, The AMBC beads also showed great selectivity for CO2 (79.1) in the CO2/N-2 gas mixture. The easily collected synthesized AMBC beads can be used as an effective and environmentally friendly alternative adsorbent for CO2 capture. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.