| 摘要 |
The invention relates to a carbonic adsorbent for collecting carbon dioxide and to a process for obtaining the same. According to the invention, the adsorbent is an activated coal with the surface modified with 11.3...16.5% by mass aminic functional groups, has a total volume of pores of 0.484...0.702 cm/g, the BET surface area of 354...842 m/g and an adsorption capacity in relation to the carbon dioxide of 5.7...7.8% by mass at the absorption temperature of 100°C and atmospheric pressure. As claimed by the invention, the process consists in separating the fraction of carbon not burned from the fly ash, which is then subjected to magnetic separation, grinding and screening, and further on, to acid digestion, steam activation at 900°C for developing the porous structure and increasing the specific surface, and, in the end, the activated carbonic material is treated with 1...30% amine salt, from which an activated carbonic material with surface modified with aminic functional groups results. |
