Research Article
Dynamic Study of VSA and TSA Processes for VOCs Removal from Air
Table 3
Adsorbent and bed characteristics and operating conditions used in the Aspen Adsorption simulations.
| | Parameter | Value |
| | Number of adsorbent bed | 1 | | VOC mixture | Dichloromethane/acetone | | Concentration (ppm) | 3000/1500 | | Bed height (m) | 1 | | Bed diameter (m) | 0.2 | | Packing density (kg·m−3) | 250 | | Particle diameter (mm) | 1 | | Interparticle voidage, ε | 0.4 | | Void of pellets, εp | 0.36 | | ΔHdichloromethane (kJ/mol) | −40 | | ΔHacetone (kJ/mol) | −50 | | Dz (m2·s−1) | 1.83 10−3 | | hf (W·m−2·K−1) | 56 | | (W·m−2·K−1) | 48 | | Feed flow rate (mol/min) | 20 | | Purge flow rate (mol/min) | 12 | | Tads (K) | 298 | | VSA cycle | | | Adsorption pressure (atm) | 1 | | Desorption pressure (atm) | 0.5 | | tad (s) | 9000 | | tevac (s) | 60 | | tpg (s) | 40000 | | tPR (s) | 80 | | Cycle time (s) | 49140 | | TSA cycle | | | Adsorption pressure (atm) | 1 | | Tdes (K) | 443 | | tad (s) | 9000 | | theat (s) | 7600 | | tcool (s) | 5500 | | Cycle time (s) | 22100 |
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