A novel removal of CO2 using nitrogen doped biochar beads as a green adsorbent

作者：Minh Viet Nguyen; Lee Byeong Kyu^*

来源：Process Safety and Environmental Protection, 2016, 103: 490-498.

DOI：10.1016/j.psep.2016.04.007

• Biochar bead
• CO2 capture
• Climate change
• Modification
• Regeneration
• Selectivity

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.

• 出版日期2016-11