IMPROVED INTEGRATION OF RAPID CYCLE PRESSURE SWING ADSORPTION WITH REFINERY PROCESS UNITS (HYDROPROCESSING, HYDROCRACKING, ETC.)
The present invention is a method for operating a rapid cycling pressure swing adsorption (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 feed gas having a purity of F % at high pressure into a first end of a b...
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Zusammenfassung: | The present invention is a method for operating a rapid cycling pressure swing adsorption (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 feed gas having a purity of F % at high pressure into a first end of a bed which selectively adsorbs the tail gas and passes the product gas out a second end of the bed for a time, F. The product gas has a purity, P %, and a rate of recovery of R %. Then the bed is cocurrently depressurized for a time, t co , followed by countercurrently depressurizing the bed for a time, tCN. The bed is then purged for a time, tP, wherein desorbate (tail gas) is released at the first end of the bed at a pressure greater than 30 psig. Subsequently the bed is repressurized for a duration, tRP.
La presente invencion es un metodo para operar una adsorcion de oscilacion de presion de ciclo rapido (RCPSA) que tiene un tiempo de ciclo, T, para separar un gas de alimentacion en un gas no adsorbido y gas posterior. El metodo incluye los pasos de hacer pasar el gas de alimentacion que tiene una pureza de F% a presion elevada hacia un primer extremo de un lecho que adsorbe selectivamente el gas posterior y pasa el gas de producto fuera de un segundo extremo del lecho durante un tiempo, F. El gas de producto tiene una pureza P%, y un regimen de recuperacion de R%. Luego el lecho se despresuriza a co-corriente durante un tiempo, tCO, seguido por despresurizacion a contra corriente del lecho durante un tiempo, tCN. El lecho luego se purga durante un tiempo, tP, en donde el desorbato (gas posterior) se libera en el primer extremo del lecho a una presion mayor de 2.109 kg/cm2 (30 psig). Subsecuentemente, el lecho se represuriza por una duracion, tRP. |
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