A direct synthesis of mesoporous carbon supported MgO sorbent for CO2 capture

作者：Bhagiyalakshmi Margandan; Hemalatha Pushparaj; Ganesh Mani; Mei Peng Mei; Jang Hyun Tae^*

来源：Fuel, 2011, 90(4): 1662-1667.

DOI：10.1016/j.fuel.2010.10.050

• Mesoporous carbon
• Metal-incorporation
• MgO
• One pot synthesis
• CO2 adsorption

Ordered mesoporous carbon supported MgO (Mg-OMC) materials were synthesized by the carbonization of sulfuric-acid-treated silica/triblock copolymer/sucrose/Mg(NO3)(2) composites. In the current approach, triblock copolymer P123 and sucrose were employed as both structure-directing agents for the self-assembly of rice husk ash silica solution and carbon precursor. Sulfuric acid was used to cross-link P123 and sucrose in the as-synthesized composites in order to improve the carbon yield. The synthesized Mg-OMC was characterized by X-ray diffraction, N-2 adsorption-desorption isotherm method, X-ray photoelectron spectroscopy, scanning electron microscope equipped with energy dispersive X-ray analysis and transmission electron microscopy. The thermal stability of Mg-OMC was verified by CO2-temperature programmed desorption, which confirmed the chemisorption of CO2 on MgO. The CO2 adsorption capacity of Mg-OMC-1 was observed to be 92 mg/g of sorbent which is comparable with that of the well established CO2 sorbents.

• 出版日期2011-4