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1. (WO2017060796) HYBRID PROCESS AND PLANT FOR THE SELECTIVE ABSORPTION OF GASES FROM A GAS MIXTURE

Pub. No.:    WO/2017/060796    International Application No.:    PCT/IB2016/055792
Publication Date: Fri Apr 14 01:59:59 CEST 2017 International Filing Date: Thu Sep 29 01:59:59 CEST 2016
IPC: B01D 53/14
B01D 53/34
B01D 53/77
Applicants: GIAMMARCO-VETROCOKE S.R.L.
Inventors: TOMASI, Luigi
Title: HYBRID PROCESS AND PLANT FOR THE SELECTIVE ABSORPTION OF GASES FROM A GAS MIXTURE
Abstract:
A hybrid process for the selective absorption of gases from gas mixtures containing them, characterized by comprising the steps of: - an initial absorption of the gases to be removed by a physical absorption process by which up to 30% of the gases to be removed is absorbed by physical solubility in an absorbent solution which is subsequently flash- regenerated, and - a final absorption of the remaining gases with a chemical absorption process by which the remaining gases to be removed are chemically absorbed by an absorbent solution which is subsequently regenerated by means of a heat and/or steam external supply, the heat supplied for the regeneration of the chemical absorption solution and largely contained in the gas mixture exiting from the regeneration step being recovered and re-used in double effect for improving and/or for completing the flash-regeneration of the solution used for the physical absorption of the gases to be removed.