A New Steps Sequence Table to Improve the Performance of the Jam Petrochemical H2-PSA Industrial Plant

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.

Keywords:

Pressure Swing Adsorption , Industrial Plant , H2 Purification , Numerical Simulation , Zeolite 5A