Natural Gas Sweetening Using an Energy-Efficient, State-of-the-Art, Solid–Vapor Separation Process

Hani Ababneh, Ahmed AlNouss, Iftekhar A. Karimi, Shaheen A. Al-Muhtaseb*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


With the anticipated rise in global demand for natural gas (NG) and liquefied natural gas (LNG), sour gas reserves are attracting the attention of the gas industry as a potential resource. However, to monetize these reserves, sour natural gas has to be sweetened by removing acid gases (carbon dioxide and/or hydrogen sulfide) before liquefaction. The solidification of these acid gases could be the basis for their separation from natural gas. In this study, a state-of-the art solid-vapor (SV) separation unit is developed for removal of acid gases from methane and simulated using a customized Aspen Plus operation unit. The operating principles and conditions, mathematical model, and performance results are presented for the SV unit. Further performance analyses, means of optimization and comparisons to conventional methods used by the industry were studied. Results showed that for similar sweet gas purity, the developed SV unit consumes only 27% of the energy required by the amine sweetening unit. Furthermore, it saves on capital costs, as it requires less equipment and does not suffer from high levels of corrosion.

Original languageEnglish (US)
Article number5286
Issue number14
StatePublished - Jul 2022

Bibliographical note

Publisher Copyright:
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  • cryogenic CO separation
  • natural gas sweetening
  • solid phase formation
  • solid-vapor equilibrium
  • ternary mixture separation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering


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