利用六种孔结构不同的商业无定形硅胶制备了不同四乙烯五胺（TEPA）担载量的固态胺吸收剂。吸收剂的微观结构通过BET和SEM测试;并在TGA反应器中,考察固态胺在30～80℃,CO2体积分数为1%～100%范围内的吸收性能。实验表明,固态胺吸收CO_2性能与温度、CO_2浓度以及载体结构有密切的联系。固态胺适合在低温（30～60℃）低CO_2浓度下（约10%）进行CO_2分离。载体结构通过影响最优担载量,从而影响固态胺吸收性能,孔容和孔径分别在1.211 cm~3/g和13 nm附近的载体在担载量为45%时拥有最好的吸收能力（2.87 mmol/g）。
Six amorphous silica materials with different pore structures were functionalized with Tetraethylenepentamine（TEPA） by a wet impregnation method.The materials before and after impregnation are characterized by BET and SEM.A N_2 stream containing 10%CO_2 was used to test the influence of pore structure,temperature,CO_2 concentration on the performance of CO_2 capture. The results show that amine-impregnated silicas are very promising candidates for post-combustion CO_2 capture because of their high performance at low CO_2 concentration（～10%） and temperature （～60℃）.It＇s observed that pore structure had an impact on the CO_2 performance through the optimal amine loading.Silica support with a pore volume of around 1.211 cm~3/g and pore size of 13nm obtained a maximum CO_2 capacity（2.87 mmol/g-sorbent）.
参考文献
| [1] | Wen Li;Praveen Bollini;Stephanie A. Didas .Structural Changes of Silica Mesocellular Foam Supported Amine-Functionalized CO2 Adsorbents Upon Exposure to Steam[J].ACS applied materials & interfaces,2010(11):3363-3372. |
| [2] | Won-Jin Son;Jung-Sik Choi;Wha-Seung Ahn .Adsorptive removal of carbon dioxide using polyethyleneimine-loaded mesoporous silica materials[J].Microporous and mesoporous materials: The offical journal of the International Zeolite Association,2008(1/3):31-40. |
| [3] | Xinlong Yan;Lei Zhang;Ying Zhang .Amine-Modified SBA-15: Effect of Pore Structure on the Performance for CO2 Capture[J].Industrial & Engineering Chemistry Research,2011(6):3220-3226. |
| [4] | Ma, XL;Wang, XX;Song, CS ."Molecular Basket" Sorbents for Separation of CO2 and H2S from Various Gas Streams[J].Journal of the American Chemical Society,2009(16):5777-5783. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%