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考虑到多孔吸附材料纳米级孔隙在吸附钙离子过程中存在的特殊效应,通过比较不同空隙的吸附材料(包括13X沸石、5nm分子筛和4nm分子筛)在超声波和搅拌作用下的吸附效果,进而研究超声波强化吸附传质过程,并对其超声波过程强化机理进行了初步的探讨.结果表明:超声波强化了吸附传质.当吸附剂的孔隙小于吸附水合钙离子粒径时,以颗粒外表面吸附为主,传质过程由膜扩散决定,吸附平衡受热力学平衡控制;当吸附剂的空隙大于吸附水合钙离子粒径时,以颗粒孔隙吸附为主,传质过程由粒内散决定,吸附平衡受纳米孔隙效应和热力学平衡共同作用影响.
Taking into account the special effect of nanoscale pores of porous adsorbent in the adsorption of calcium ions, the adsorption effect of ultrasonic adsorbing materials (including 13X zeolite, 5nm molecular sieve and 4nm molecular sieve) under different ultrasonic waves and stirring was compared to study the effects of ultrasonic Strengthen the adsorption and mass transfer process, and its ultrasonic enhanced mechanism of the preliminary discussion.The results show that: ultrasonic enhanced absorption mass transfer.When the adsorbent pore is smaller than the adsorption of hydrated calcium ion particle size, the particle surface adsorption-based , The mass transfer process is determined by the membrane diffusion, and the equilibrium of adsorption is controlled by the thermodynamic equilibrium. When the adsorbent gap is larger than the size of hydrated calcium ion, the pore adsorption is dominant, and the mass transfer process is determined by the intragranular dispersion. The adsorption equilibrium is dominated by nano Pore effect and thermodynamic equilibrium effect.