Estimating the overall mass transfer coefficient k(v) of the Wheeler-Jonasequation: A new and simple model

The modified Wheeler-Jonas model is well known for its good prediction of b reakthrough times for organic vapors on activated carbon beds. To use this model adequately one must estimate the overall adsorption rate coefficient k(v). In this work a new equation is proposed to calculate k(v). The releva nt parameters of this equation are the airstream velocity, the affinity con stant beta of the organic vapor, and the mean diameter of the carbon partic les. Very accurate predictions were obtained for breakthrough times on a wi de range of carbons using the calculated values of k(v). Compared with othe r models, this model shows a higher accuracy and a lower degree of uncertai nty.