Separation of co2 and h2s from gas mixtures

Abstract

Abstract A PROCESS OF IMPROVED THERMAL EFFICIENCY AND LOWER CAPITAL COST FOR SEPARATING THE ACID GASES CO2, AND/OR H2S FROM GAS MIXTURES WHICH IS APPLICABLE WHEN THE PARTIAL PRESSURE OF ACID GAS IS AT LEAST 25 POUNDS PER SQUARE INCH. TWO SEPARATE ABSORPTION ZONES ARE USED, SUPPLIED WITH SEPARATE STREAMS OF SOLUTION AND OPERATING AT DIFFERENT TEMPERATURES. THE GAS FLOWS IN SERIES THROUGH THE SEPARATE ABSORPTION ZONES WITH SOLUTION LEAVING THE HIGHER TEMPERATURE ZONE AT A TEMPERATURE HIGHER THAN THE ATMOSPHERIC BOILING TEMPERATURE OF THE REGENERATED SOLUTION. TWO SEPARATE REGENERATION ZONES ARE USED OPERAING AT DIFFERENT TEMPERATURES (AND CORRESPONDINGLY DIFFERENT PRESSURES) WITH SOLUTION FROM THE HIGHER TEMPERATURE ABSORPTION ZONE REGENERATED IN THE HIGHER TEMPERATURE, HIGHER PRESSURE REGENERATION ZONE. STRIPPING STEAM FOR THE LOWER TEMPERATURE REGENERATION ZONE IS GENERATED BY REDUCING THE PRESSURE ON THE HOT REGENERATED SOLUTION FROM THE HIGHER TEMPERATURE REGENERATION ZONE. THE PROCESS PERMITS THE EFFECTIVE UTILIZATION OF THE HEAT CONTENT OF HOT FEED GASES AND THE HEAT OF ABSORPTION OF THE ACID GASES, WHICH HEAT SOURCES HAVE BEEN IN PREVIOUS PRACTICE LARGLY WASTED.

Inventors

• 👤 Homer E Benson

Bibliographic Details