Characterization of clathrate hydrates with CO2 + 1-propanol or 2-propanol: Implications for flow assurance, refrigeration, carbon capture, and skincare applications

Meku Maruyama, Satoshi Takeya, Akio Yoneyama, Tomoaki Ishikawa, Takuma Misawa, Shun Nagayama, Saman Alavi, Ryo Ohmura

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

There has been growing interest in the use of hydrate-based technology for energy and environmental applications; however, structural characterization of some hydrate phases relevant to these applications has not been dealt with sufficiently in previous studies. This paper reports crystallographic characterization of hydrates formed in [CO2 + 1-propanol (propan-1-ol) + water] and [CO2 + 2-propanol (propan-2-ol) + water] systems with powder X-ray diffraction (PXRD) and X-ray computed tomography (CT) measurements. It was revealed that structure I CO2 hydrate and a non-crystalline phase involving 1-propanol are formed in CO2 + 1-propanol system. As for CO2 + 2-propanol system, crystalline structure of the formed hydrate differs depending on thermodynamic conditions; at 3.3 MPa, 274 K and at 2.2 MPa, 263 K, sI CO2 hydrate was formed, whereas at lower pressure and temperature, i.e., 0.5 MPa and 255 K, a new tetragonal structure outside the canonical hydrates was identified. Implications of using 1-propanol as a thermodynamic inhibitor and kinetic promoter of hydrate formation are discussed, which opens some possibilities into petroleum exploration/production applications and the development of hydrate-based refrigeration systems. The structural identification of tetragonal (sII′) CO2 + 2-propanol hydrate sheds new light on developing hydrate-based CCS process and novel skin care products.

Original languageEnglish
Pages (from-to)305-314
Number of pages10
JournalJournal of Industrial and Engineering Chemistry
Volume131
DOIs
Publication statusPublished - 2024 Mar 25

Keywords

  • Carbon capture
  • Clathrate hydrate
  • Facial cleanser
  • Oil and gas pipeline
  • Powder X-ray diffraction
  • X-ray computed tomography

ASJC Scopus subject areas

  • General Chemical Engineering

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