LOW ENERGY CYCLIC PSA PROCESS

• Main Authors: RIFFLART, SEBASTIEN, ALMEIDA PEIXOTO RIBEIRO, ANA MAFALDA, GODINHO DE FARIA DOS SANTOS, JOAO CARLOS, EGIDIO RODRIGUES, ALIRIO
• Format: Patent
• Language: English; French
• Published: 22.11.2012
• Subjects: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSEGASES [GHG]; CHEMISTRY; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

The invention is drawn to a cyclic pressure swing adsorption (PSA) process to recover an off-gas stream at high pressure with low energy consumption. Each cycle of said process comprises a blowdown phase consisting in lowering the pressure in an adsorbent bed from Phigh to Plow wherein said blowdown phase is divided into several partial blowdown phases, wherein the gas streams discharged during the partial blowdown phases are introduced into respective discharge tanks (T1-Tn).