Separation Science and Technology, Vol.47, No.8, 1199-1212, 2012
Modeling of a PSA-TSA Process for Separation of CH4 from C-2 Products of OCM Reaction
Computational modeling of C2H6-C2H4 adsorption separation from CH4 onto CaX zeolite is discussed. Dynamic adsorption is studied to derive mass transfer parameters of the components. A two-bed and four-step PSA-TSA is introduced and sensitivity analysis is performed to approach to the higher products' purity and recovery. CH4-countercurrent pressurization, as the preferred method and optimum purge/feed of 0.49 are determined for the light (CH4) and heavy products (C(2)s) recovery of 84% and 96%, with a purity of 95% and 72%, respectively. The effect of desorption temperature and heat transfer coefficient are studied to determine the temperature variation effect on the process performance.