Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/48867
Title: MODELING AND ASSESSMENT OF PROPYLENE/PROPANE SEPARATION BY PRESSURE SWING ADSORPTION ON SICHA
Authors: MONA KHALIGHI
Keywords: Kinetic seperation, Adsorption, SiCHA, Zeolite, Optimization
Issue Date: 25-Jan-2013
Source: MONA KHALIGHI (2013-01-25). MODELING AND ASSESSMENT OF PROPYLENE/PROPANE SEPARATION BY PRESSURE SWING ADSORPTION ON SICHA. ScholarBank@NUS Repository.
Abstract: Cryogenic distillation is the common method for separating propylene/propane mixtures, but this is highly energy intensive. Some new 8-ring silica zeolites, especially pure silica chabazite (SiCHA), are known to show high diffusivity ratio for propylene over propane which could have high potential for kinetic separation of propylene propane. In this work, we study the separation of propylene/propane using SiCHA in a simple pressure vacuum swing adsorption (PVSA) process. A non-isothermal isobaric micropore diffusion model with concentration-dependent diffusivity has been developed to simulate this kinetically controlled separation. It is implemented in the multi-physics software COMSOL to simulate different modes ofPVSA operationand verified with published propylene/propane separation data on 4A zeolite. In addition to a detailed parametric study, , we present a sequential optimization strategy based on neuro-fuzzy model and genetic algorithm (GA) with synergistic combination of COMSOL simulation model to minimize the energy consumption and total cost of process. The optimum results are compared with those for 4A zeolite for two different industrially relevant feed compositions.
URI: http://scholarbank.nus.edu.sg/handle/10635/48867
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