The influence of different surface-modification treatments on biomass-based carbons and their effects on adsorption of carbon dioxide

ABSTRACT

Surface modification of biomass-based carbon with nitrogen-containing functional groups is performed by the different modification method, including the thermal and chemical methods. We also investigate the effect of the different reaction parameters on their pore structure using the Brunauer–Emmett–Teller surface area and adsorption performance based on methylene blue value. Fourier transforms infrared spectroscopy methods are performed to confirm the presence of N-containing groups. Based on above results, the comparison effect of different modification methods on physico-chemical propriety and adsorption properties of biomass-based carbon materials are carried out. In conclusion, all modification methods could enhance CO₂ adsorption capability. However, the carbon materials treated with ammonia using thermal method show the best performance.

KEYWORDS:

• Activated carbon
• CO₂ adsorption
• functional groups
• porosity
• surface modification

Funding

The authors are grateful for the financial support of the National Hi-tech Research and Development Program of China (973) (2010CB732206 and 2011CB201505). This work was supported by Program for New Century Excellent Talents in University (NCET-12-0118), the Fundamental Research Funds for the Central Universities and Qing Lan Project of Jiangsu Province.

Additional information

Funding

The authors are grateful for the financial support of the National Hi-tech Research and Development Program of China (973) (2010CB732206 and 2011CB201505). This work was supported by Program for New Century Excellent Talents in University (NCET-12-0118), the Fundamental Research Funds for the Central Universities and Qing Lan Project of Jiangsu Province.