Chemistry

Experiment 1c: Adsorption of carbon dioxide at 1200 hPa

Experiment 1c: Adsorption of carbon dioxide at 1200 hPa



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Calculations

The breakthrough charge XD. is derived from the experimentally determined breakthrough time, the mass flow of the adsorptive (calculated from the volume flow VR.) and the mass of the adsorbent is calculated.

The saturation load XS. can be calculated analogously from the saturation time. Here, the proportion of adsorptive that flows out of the adsorber after the breakthrough must be subtracted. Since the determination of the integral term of the concentration of adsorptive after the breakthrough is relatively time-consuming, taking into account the so-called half-life tH (cA./ cE. = 0.5) the equation for the saturation load can be simplified to a good approximation.

XD.=m·mA.dtD.XS.=m·mA.d(tS.0tS.ccE.dt)0tS.ccE.dt=outflowingAdsorptiveafterto thebreakthroughXS.=m·mA.dtH

The adsorption zone hZ can now be calculated from the breakthrough and saturation loading as well as the bed height of the adsorbent for the respective adsorber with the following equation.

HZ=H(1XD.XS.)


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