A process for separating a product gas from gaseous mixture

Abstract

A gas pressurized separation system strips a product gas from a stream yielding a high pressure gaseous effluent containing the product gas such as may be used to capture CO2 from coal fired post combustion flue gas capture and to purify natural gas, syngas and EOR recycle gas. The system comprises a gas pressurized stripping column allowing flow of one or more raw streams in a first direction and allowing flow of one or more high pressure gas streams in a second direction, to strip the product gas into the high pressure gas stream and yield a high pressure gaseous effluent that contains the product gas. The process can further comprise a final separation process to further purify the product gas from the GPS column. For CO2 product, a preferred energy efficient final separation process, compound compression and refrigeration process, is also introduced.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Patent Application Serial No. 62 / 087,885, entitled "Gas Pressurized Separation Column and Method of Using Same for Separating Gases," filed December 5, 2015, which is incorporated herein by reference. [0003] government license [0004] This invention was developed in part by the U.S. Department of Energy for the project "CO capture from post-combustion flue gases" 2 The government support of the U.S. Department of Energy award serial number DE-FE0007567 issued by "Development of Novel Gas Pressure Stripping Process Technology". The U.S. government has certain rights to the invention. technical field [0005] This invention relates to gas pressurized separation columns and methods of utilizing such columns. Background technique [0006] Capturing CO2 from utility flue gas is the most expensive step in an integrated carbon capture and storage (CCS) process. Existing capture technolog...

AI Technical Summary

Problems solved by technology

[0023] Conventional stripping methods have several fundamental disadvantages, including: One disadvantage is that the operating pressure of the stripper is determined by the CO in the reboiler 2 The vapor pressure of the lean solution is determined by the composition of the lean solution and the temperature of the reboiler

To increase the operating pressure, the temperature in the reboiler must be raised, which is usually limited by the stability of the amine solvent

The temperature of the reboiler in a conventional stripper is typically 120°C, so the operating pressure is limited to about 28 psia

Images