A study on hydrogen uptake and release of a eutectic mixture of biphenyl and diphenyl ether

Munjeong Jang, Byeong Soo Shin, Young Suk Jo, Jeong Won Kang, Sang Kyu Kwak, Chang Won Yoon, Hyangsoo Jeong

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Hydrogen storage in Liquid Organic Hydrogen Carrier (LOHC) systems is appealing for the safe storage and distribution of excess renewable energy via existing gasoline infrastructures to end-users. We present the eutectic mixture of biphenyl and diphenyl ether of its first use as a LOHC material. The material is hydrogenated with 99% selectivity without the cleavage of C–O bond, with commercial heterogeneous catalysts, which is confirmed by nuclear magnetic spectroscopy and gas chromatography-mass spectrometry. Equilibrium concentration, dehydrogenation enthalpy, and thermo-neutral temperature are calculated using a density functional theory. The results indicate that O-atom-containing material exhibits more favorable dehydrogenation thermodynamics than that of the hydrocarbon analogue. The H2-rich material contains 6.8 wt% of gravimetric hydrogen storage capacity. A preliminary study of catalytic dehydrogenation on a continuous reactor is presented to demonstrate a reversibility of this material.

Original languageEnglish
Pages (from-to)11-16
Number of pages6
JournalJournal of Energy Chemistry
DOIs
Publication statusPublished - 2020 Mar 1

Keywords

  • Dehydrogenation
  • Diphenyl ether
  • Hydrogen storage
  • Liquid organic hydrogen carrier
  • Thermodynamics

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Electrochemistry

Fingerprint Dive into the research topics of 'A study on hydrogen uptake and release of a eutectic mixture of biphenyl and diphenyl ether'. Together they form a unique fingerprint.

  • Cite this