Simulation-based analysis for highly sour natural gas sweetening using membranes/amines hybrid systems

Mohammed Alkatheri, Ricardo Grandas, Alberto Betancourt-Torcat, Ali Almansoori

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The most widely employed sweetening gas scheme considers chemical absorption by solvents for acid gases removal. While this scheme is both well-known and proven, its application for tapping highly sour gas resources can be operationally challenging, costly, and wasteful. Nevertheless, new polymeric membranes have been applied for bulk H2S removal from natural gas, including very high H2S concentrations and operating pressures. Recent developments on this area may contribute to the development of unconventionally high sour gas resources or potentially retrofitting existing plants. For instance, in a primary stage the membrane system could be used to reduce the bulk concentration of H2S and CO2 in the feed gas. Sequentially, the final sweet gas product specifications could be met using an amine-based system. Accordingly, this type of hybrid scheme could potentially help reducing capital and operating expenditures. The present study examines the sweetening of highly sour gas with 15% H2S (i.e., over 20% of H2S and CO2 combined) applying a simulation-based analysis. The proposed hybrid process was simulated using ProMax® v3.2. The simulation results show that the operating/utility expenditures of the sweetening process could be reduced using a hybrid system approach (instead of a stand-alone amine system).

Original languageBritish English
Title of host publicationSeparations Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting
Pages325-333
Number of pages9
ISBN (Electronic)9781510834477
StatePublished - 2016
EventSeparations Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting - San Francisco, United States
Duration: 13 Nov 201618 Nov 2016

Publication series

NameSeparations Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting

Conference

ConferenceSeparations Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting
Country/TerritoryUnited States
CitySan Francisco
Period13/11/1618/11/16

Keywords

  • Amines
  • Economics
  • Gas sweetening
  • Highly sour
  • Hybrid system
  • Membranes
  • Natural gas processing

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