Separation of nitrogen from natural gas: Conventional and emerging technologies

Zhikao Li

Research output: ThesisDoctoral Thesis

2551 Downloads (Pure)


Nitrogen removal is crucial in natural gas processing. However, separating out this inherent impurity is challenging due to its similarity in properties with methane. Current processes, such as cryogenic distillation, are energy intensive and complex. Here, a review on the separation mechanisms underlying conventional and emerging nitrogen separation technologies was conducted. Three of the most promising emerging approaches of nitrogen separation were studied further: (1) by adsorption kinetics, resulting in reference-quality data for adsorption process design; (2) by transition-metal-complex solutions, with 14 candidate solutions screened and their performance ranked; (3) by lithium metal, achieving record-high nitrogen loading and extremely high selectivity.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Award date28 Jun 2018
Publication statusUnpublished - 2018


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