complete modeling of dehydration unit, adsorption and regeneration

This paper presents the modeling and simulation of natural gas dehydration unit of bidboland gas refinery# the cyclic thermal swing adsorption (tsa) technique is used in this unit and silica gel is used as an adsorbent# the unit consists of a three-bed system with a 15-hours cycle; 5 hours of adsorption, 5 hours of heating and 5 hours of cooling# a non-isothermal one-dimensional model is used for simulation of process and the langmuir- freundlich model is selected for gas and solid equilibrium calculations# the simulation results are in a good agreement with the industrial data# in addition, to increase the capacity of the bidboland dehydration unit some scenarios are investigated# the results show that the use of the four-bed system; two bad at adsorption, one bed at heating and one bed at cooling operation, can increase the capacity of the bidboland dehydration unit up to the boundary of 9 mmscmd#