Air drying by pressure swing adsorption.

Abstract

Air drying experiments by pressure swing adsorption (PSA) were carried out, using two columns packed with silica gel as adsorbent. Measurements were also madeof batch adsorption of water vapor on silica gel to obtain input data for the authors' PSAsimulation program. Experimental PSAresults were compared with this computer simulation. Good agreement was obtained and the trend of experimental results was well explained by simulation for both isothermal and non-isothermal cases. In the simulation, however, mass transfer coefficients two or three times larger than those estimated conventionally from batch measurement were used to obtain good coincidence. These larger masstransfer coefficients were determined by a recently developed methodfor short adsorption and desorption cycle.5} The simulation method is useful in predicting the performance of air drying PSA.

Pressure swing adsorption. Part II: Experimental study of a nonlinear trace component isothermal system

“…Nevertheless, for a small-diameter bed with a relatively thick-walled steel vessel the assumption of a uniform bed temperature is probably a good approximation. It is in principle possible to extend the model to include heat effects as was done by Chihara et al (1983), but only at the expense of considerably increased complexity. Heat effects are likely to be more significant in larger-diameter beds and when the concentration of the adsorbable species in the feed is higher, but for small-scale laboratory systems using dilute feeds the simple heat balance calculation outlined above suggests that the development of a nonisothermal model would not be justified.…”

Performance Simulation of Two-Bed Adsorption Refrigeration Chiller with Mass Recovery

“…The rate of adsorption or desorption is calculated by the linear driving force kinetic equation, The coefficients of LDF equation for silica gel/ water are determined by Chihara and Suzuki [18] and are given in Table 2:…”

Pressure swing adsorption: A theoretical study of diffusion‐induced separations

“…A similar model was suggested by Carter and Wyszynski (1983). Chihara and Suzuki (1983) proposed a similar model, but theirs also considered the energy balance. Raghaven et al (1985) presented a model that included both pressure-dependent mass transfer coefficients and axial dispersion in an isothermal system.…”