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为了减少燃煤电厂烟气CO2排放,对浸渍法制备的活性氧化铝(Al2O3)负载1,8-二氮杂二环[5,4,0]十一碳-7-烯(DBU)吸附剂及其固定床吸附CO2性能进行了研究,采用全自动气体吸附分析仪和同步热重分析仪对吸附剂比表面积、总孔容、平均孔径和热稳定性进行了表征。实验结果表明,Al2O3负载DBU吸附剂具有较大的比表面积和发达的孔隙结构,在低于140℃时具有良好的热稳定性;在室温条件下,DBU负载率为11.75%时,吸附剂对CO2吸附量最高可达18.11mg/g;经过8次吸附-脱附循环实验后,吸附剂仍保持较好的CO2吸附性能。
In order to reduce CO2 emissions from flue gas in coal-fired power plants, the active alumina (Al2O3) supported 1,8-diazabicyclo [5,4,0] undec-7-ene (DBU) And its fixed bed adsorption of CO2 were studied using automatic gas sorption analyzer and synchronous thermogravimetric analyzer adsorbent specific surface area, total pore volume, average pore diameter and thermal stability were characterized. The experimental results show that the Al2O3-loaded DBU adsorbent has a large specific surface area and well-developed pore structure, and has good thermal stability below 140 ° C. When the DBU loading rate is 11.75% at room temperature, the adsorbent pair CO2 up to 18.11mg / g; after 8 adsorption-desorption cycles, the adsorbent still maintained good CO2 adsorption performance.