以九水硝酸铝为铝源，非表面活性剂柠檬酸为模板剂，稀氨水为沉淀剂合成有序介孔氧化铝（ OMA）。以四乙烯五胺（ TEPA）为活性组分，采用物理浸渍将其负载到OMA的内孔及比表面上，制备出氨基功能化的OMA用于CO2的选择吸附研究。采用XRD、BET和TEM对合成的吸附剂进行表征，通过自制的固定床反应器测量穿透曲线的方法研究其对CH4／CO2混合气的吸附分离性能。分别考察了负载量和吸附温度对吸附性能和分离因子的影响。结果表明，TEPA负载量为50％的吸附剂、吸附温度为70℃时对CO2吸附量最大，为2．598 mmol／g，TEPA／OMA经过10次吸附-脱附循环后，其吸附性能变化较小，仅下降了8．65％，具有较好的循环稳定性。
Organized mesoporous alumina (OMA) was synthesized by Al(NO3)3· 9H2O, non-surfactant CA was used as template , dilute ammonia as precipitating agent .Solid amine adsorbents were prepared by introducing tetraethylenepentamine ( TEPA ) into OMA by physical impregnation method for CO 2 capture.The synthesized adsorbents were charactered by XRD , N2 adsorption-desorption and TEM .The adsorption separation properties of CH 4/CO2 were discussed by means of breakthrough curve analysis in self-made fixed bed and the effects of TEPA loadings and adsorption temperatures were investigated .The results show that the maximal adsorption capacities are 2 .598 mmol/g achieved as 50% TEPA loadings and 70 ℃ adsorption temperature.In addition, after ten cyclic adsorption-desorption tests, the CO2 adsorption capacity changes a little , just decreases about 8.65%, demonstrating the TEPA/OMA adsorbent displays am excellent regenerability .
参考文献
| [1] | Marco Tagliabue;David Farrusseng;Susana Valencia.Natural gas treating by selective adsorption: Material science and chemical engineering interplay[J].Chemical engineering journal,20093(3):553-566. |
| [2] | 江皓;吴全贵;周红军.沼气净化提纯制生物甲烷技术与应用[J].中国沼气,2012(2):6-11,19. |
| [3] | P. D. Jadhav;R. V. Chatti;R. B. Biniwale;N. K. Labhsetwar;S. Devotta;S. S. Rayalu.Monoethanol Amine Modified Zeolite 13X for CO_2 Adsorption at Different Tempera[J].Energy & Fuels,20076(6):3555-3559. |
| [4] | 黄能武 .介孔氧化铝的制备与应用[D].天津大学,2010. |
| [5] | Jie Liu;Dandan Cheng;Yue Liu;Zhongbiao Wu.Adsorptive Removal of Carbon Dioxide Using Polyethyleneimine Supported on Propanesulfonic-Acid-Functionalized Mesoporous SBA-15[J].Energy & Fuels,2013Sep./Oct.(Sep./Oct.):5416-5422. |
| [6] | 马媛 .介孔氧化铝的制备[D].华东理工大学,2013. |
| [7] | Manli Yao;Yanyan Done;Xin Hu;Xingxing Feng;Aiping Jia;Guanqun Xie;Gengshen Hu;Jiqing Lu;Mengfei Luo;Maohong Fan.Tetraethylenepentamine-Modified Silica Nanotubes for Low-Temperature CO_2 Capture[J].Energy & Fuels,2013Nov./Dec.(Nov./Dec.):7673-7680. |
| [8] | 姚蔓莉;董艳艳;谢菁;贾爱平;谢冠群;胡庚申;罗孟飞.聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO2吸附应用[J].物理化学学报,2014(4):789-796. |
| [9] | 阮红征 .CO2/N2混气体吸附分离研究[D].天津大学,2010. |
| [10] | 王亚坤;赵瑞红;冯晓霞;张伟;李肖飞.氨基化有序介孔氧化铝合成及吸附CO2性能研究[J].材料导报,2012(16):71-74. |
| [11] | Irani, Maryam;Fan, Maohong;Ismail, Hanafi;Tuwati, Abdulwahab;Dutcher, Bryce;Russell, Armistead G..Modified nanosepiolite as an inexpensive support of tetraethylenepentamine for CO2 sorption[J].Nano Energy,2015:235-246. |
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