论文部分内容阅读
合成介孔ZrO_2并采用三乙烯四胺修饰制备CO_2吸附剂.采用X-射线粉末衍射、低温N_2吸附-脱附、傅里叶红外、X-射线光电子能谱、色散光谱、热重及CO_2程序升温脱附等表征手段对合成材料的理化性质进行表征.吸附剂的吸附性能在CO_2浓度为5%的流动气流中进行测定.研究结果表明通过三乙烯四胺改性的介孔ZrO_2对CO_2有较好的吸附性能,适当增加CO_2气体流速能促进吸附而提高吸附温度对吸附不利.当三乙烯四胺的负载量为200mg,CO_2气体流速为20 cm~3·min~(-1),吸附温度为75℃时,吸附剂表现出最好的吸附性能,最大吸附容量达到4.16mmol·g~(-1),该条件下吸附剂还具有很好的重复使用性能.因此其突出的吸附能力和良好的重复利用性表明三乙烯四胺改性的介孔ZrO_2在CO_2吸附方面具有潜力.
The mesoporous ZrO_2 was synthesized and modified by triethylenetetramine to prepare CO_2 adsorbents. X-ray powder diffraction, N_2 adsorption-desorption, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, dispersive spectroscopy, thermogravimetry and CO_2 Temperature and desorption and other characterization methods to characterize the physical and chemical properties of synthetic materials.The adsorption properties of adsorbents were measured in a flow of 5% CO 2 concentration.The results show that mesoporous ZrO 2 modified by triethylenetetramine When the loading of trimethylenetetramine is 200mg, the flow rate of CO 2 gas is 20 cm -3 · min -1, and the adsorption capacity increases with the increase of CO 2 gas velocity. When the temperature is 75 ℃, the adsorbent shows the best adsorption performance, the maximum adsorption capacity reaches 4.16mmol · g -1, and the adsorbent also has good reusability under this condition. So its outstanding adsorption capacity And good reusability shows that triethylenetetramine modified mesoporous ZrO 2 has the potential for CO 2 adsorption.