Abstract:
In this thesis, a mathematical model for rotary honeycomb adsorber has been developed to remove humidity and carbon dioxide by using molecular sieve 13X adsorbent .The objective of this study is to predict the dynamic behavior and the performance of rotary honeycomb adsorber in the efficiency of simultaneous adsorbing humidity and carbon dioxide. Finally in this study, the model is further applied to follow the change of air properties related with time in the air-conditioned room which is installed with rotary honeycomb adsorber. For simulating the sorption process, equilibrium adsorption equations (cosorption isotherms) of humidity and carbon dioxide are develovped from the correlation with Dubinin-Polanyi equation for humidity and Henry's law equation for carbon dioxide by Shen and Worek (1994). According to the research results, it is found that this model can predict the dynamic behavior and the phenomena of simultaneous heat and mass transfer of humidity and carbon dioxide adsorption. Operating condition used can provide similar adsorption efficiency for both humidity and carbon dioxide at approximately 45% ,with the rotor length of 0.1 m., the rotation speed of rotary at 25 rph and air regeneration temperature at 423 K. For the result of following the change of air properties related with time in the air-conditioned room, the model can reduce the level of carbon dioxide concentration to 122 ppm and relative humidity to 16 % at the room temperature of 302 K.