A bubbling absorption and desorption experimental device was used to study the effect of TiO2 and SiO2 nanoparticles on the CO2 absorption and desorption performance of MEA (monoethanolamine) absorbent with mass quality fraction of 30％. The results show that TiO2-MEA absorbent with mass fraction of 0.10％ has the best absorption enhancement factor,which can reach 1.095. The particle size distribution and Zeta potential of the nanoparticles remain basically unchanged before and after absorption,indicating good stability. During the desorption process,compared with MEA absorbent with mass fraction of 30％,the relative heat duty of TiO2-MEA and SiO2-MEA absorbent both with mass fraction of 0.10％ was reduced by 7.1％ and 7.0％ respectively,and the desorption capacity was increased by 7.69％ and 7.53％ respectively. In addition,nanoparticles also have a certain effect on other amine absorbents. During the desorption process,it significantly increases the peak value of the desorption rate of amine absorbent,shortens the time to reach the peak value of the desorption rate,and improves the desorption efficiency.
关键词
船舶柴油机/烟气/CO2捕集/纳米流体/传质增强
Key words
marine diesel engine/flue gas/CO2 capture/nanofluid/mass transfer enhancement
万方数据