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۱An Investigation to Survey the Effect of Feed Temperature on the Performance of the Parsian Gas Refinery N2–PSA Industrial Plant
اطلاعات انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۵
The Parsian N2–PSA industrial plant was studied numerically by mathematical modeling and numerical simulation. The model includes balances in energy, mass and momentum and thecoupled partial differential equations are solved using fully implicit finite difference scheme. In general, the PSA process performance strongly influenced by the design parameters (such as: bedsize, adsorbent physical properties, configuration and number of beds) and operational variables(such as: cycle time, flow rate, temperature and\or pressure). So, this could be achieves a maximum possible performance relate to an optimum amount of process variables. Therefore it isimportant that the behavior of the PSA operating variables were under take a review to knowingthe optimum operating conditions. The Parsian N2–PSA plant has been designed by the OXYMAT co., so the design parameters is not being considered for review in this study. In this work, we aredealing with the feed temperature and investigation of its effect on the N2 purity and recovery, which is known as a operating variable. Finally, the results of simulations show that the feed temperature near to 35 °c is well suited to N2 production in terms of its purity and recovery. In addition, as the feed temperature increases N2 productivity decreases<\div>

۲A New Steps Sequence Table to Improve the Performance of the Jam Petrochemical H2–PSA Industrial Plant
اطلاعات انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۶
The Jam H2–PSA industrial plant was studied numerically by mathematical modeling and numerical simulation. The model includes balances in energy, mass and momentum and thecoupled partial differential equations are solved using fully implicit finite difference scheme. The major disadvantage of the steps sequence table of the Jam H2–PSA plant is the existence of a timedelaybetween two purge (PG) steps. In addition, the time of adsorption (AD) step is not equal toPG step. The existence of the time–delay in PG step and not equally in times of the pressurizing (PR) and depressurizing (BD) steps can be influenced on the process performance (mainly H2recovery). In this work, therefore, a steps sequence table is designed in a way to take the sametime for AD and PG steps and also same time for BD and PR steps. The two other characteristics of the designed sequence table are the continuity of the PG step and purging of a bed by two otherbeds effluent, in contrast to plant sequence table that two beds are regenerated by a bed effluent. Furthermore, the results of simulations show that the H2 recovery is improved with the proposed steps sequence table in this work.<\div>
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