IMPROVED INTEGRATION OF RAPID CYCLE PRESSURE SWING ADSORPTION WITH REFINERY PROCESS UNITS (HYDROPROCESSING, HYDROCRACKING, ETC.)

摘要

The present invention is a method for operating a rapid cycling pressure swingadsorption (RCPSA) having a cycle time, T, to separate a feed gas into a non-adsorbed gas and tail gas. The method includes the steps of passing the feedgas having a purity of F % at high pressure into a first end of a bed whichselectively adsorbs the tail gas and passes the product gas out a second endof the bed for a time, F. The product gas has a purity, P %, and a rate ofrecovery of R %. Then the bed is cocurrently depressurized for a time, t co ,followed by countercurrently depressurizing the bed for a time, tCN. The bedis then purged for a time, tP, wherein desorbate (tail gas) is released at thefirst end of the bed at a pressure greater than 30 psig. Subsequently the bedis repressurized for a duration, tRP