PDF Publication Title:
Text from PDF Page: 001
Petroleum & Coal ISSN 1337-7027 Available online at www.vurup.sk/petroleum-coal Petroleum & Coal 55 (3) 216-225, 2013 COMPARISON OF TWO PRESSURE SWING ADSORPTION PROCESSES FOR AIR SEPARATION USING ZEOLITE 5A AND ZEOLITE 13X Masoud Mofarahi1, Ehsan Javadi Shokroo2 1Chemical Engineering Department, School of Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, Iran, Email Address: mofarahi@pgu.ac.ir 2The Parthia Chemistry Company, Knowledge Based Companies Campus, Martyr Fahmideh Talent Foundation, Shiraz, Iran, Email Address: ejavadi@nsf-partshimico.tk Received April 5, 2013, Accepted August 15, 2013 Abstract The performances of two types of zeolite 5A and zeolite 13X in oxygen separation from air with a two-bed six-step pressure swing adsorption (PSA) system were investigated using mathematical modeling. The effects of feed flow rate, adsorption step pressure, adsorption step time and purge to feed ratio on oxygen purity and recovery are studied. Comparison of two types of zeolites shows that the PSA process performance (in terms of purity and recovery) was better with zeolite 13X than the zeolite 5A. Furthermore, Results of simulation indicated a very good agreement with some current literature experimentally work. Keywords: Pressure swing adsorption; Simulation; Air separation; Oxygen production; Zeolite 5A; Zeolite 13X. 1. Introduction Three commercial methods are available for oxygen separation from air, namely cryogenic, membrane technologies and pressure swing adsorption. Usually the PSA technique will be used for lower production scales [1]. The PSA system is well suited to rapid cycling, in contrast to other cyclic adsorption separation processes, and this has the advantage of minimizing the absorbent inventory and therefore the capital costs of the system [2]. PSA process is a wide operating unit to separation and purification of gases that operates based on capability of solids adsorption and selective separation of gases. The important operational parameter in this system is the pressure, and most industrial units operate at/or vicinity of the surrounding temperature. Today, the PSA process completely is known in a wide region of the processes, and this process was preferred in contrast to other conven- tional separation methods especially, for lower capacity and higher purity. The PSA process nowadays is used for separation of the different gas mixtures. In recent years, use of this method was followed by researchers as a more important separation technique in the air separation, because generally the PSA process is more economical to other separation processes. The evolution of the PSA process around the world wide was still continuous, and each day the new act is done for this important process to achieve the best economic conditions. Use of this process to oxygen and nitrogen separation from air took for the first time in 1958 by Skarstrom. He provided his recommended PSA cycles to enrich oxygen and nitrogen in air under subject of heatless drier [3]. Therefore, Skarstrom invented a two- bed PSA cycle with equalization step for oxygen production from air using zeolite 13X adsorbent in 1966 [4]. The main reasons for the success of this technology are many reforms that achieved in this field and also is the new design and configuration for the cycles and devices [5-8]. In general, the PSA process performance strongly influenced by design parameters (such as: bed size, adsorbent physical properties, configuration and number of beds) and operational variables (such as: pressurization time, production time, purge time, feed flow rate, purge flow rate, production flow rate, temperature and/or pressure variations). So, this could be achieves maximum possible performance relate to an optimum amount of process variables. Therefore it is important that the behavior of the PSA operating variables were under take a review to knowing the optimum operating conditions. The selection of aPDF Image | PRESSURE SWING ADSORPTION PROCESSES FOR AIR SEPARATION WITH ZEOLITE
PDF Search Title:
PRESSURE SWING ADSORPTION PROCESSES FOR AIR SEPARATION WITH ZEOLITEOriginal File Name Searched:
pc_3_2013_javadi_221.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)