A Novel Eutectic Mixture of Biphenyl and Diphenylmethane as a Potential Liquid Organic Hydrogen Carrier: Catalytic Hydrogenation

Da Jung Han, Young Suk Jo, Byeong Soo Shin, Munjeong Jang, Jeong Won Kang, Jong Hee Han, Suk Woo Nam, Chang Won Yoon

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A novel, liquid-phase hydrogen storage material was produced by mixing biphenyl (C12H10, solid) and diphenylmethane (C13H12, liquid) with a mass ratio (wt %) of 35:65. The eutectic mixture was proved to be liquid at ambient temperature with a viscosity of 3.0 cP at 25 °C and a vapor pressure of 1.4 Pa at 25 °C, which potentially meets the requirements for an efficient hydrogen storage system. A theoretical study using COSMO-RS method further confirms that an optimum composition of biphenyl and diphenylmethane for the formation of eutectic mixture is 37:63 by mass, which is very close to the composition found experimentally. The eutectic mixture exhibited a superior activity for hydrogenation reactions conducted at 120 °C under 50 bar of H2 pressure in the presence of a Ru (5 wt %)/Al2O3 catalyst. Hydrogen uptake of the eutectic mixture tested was close to full conversion, which corresponds to 6.9 wt % and 60.1 g L−1 of gravimetric and volumetric hydrogen storage capacities, respectively.

Original languageEnglish
Pages (from-to)113-121
Number of pages9
JournalEnergy Technology
Volume7
Issue number1
DOIs
Publication statusPublished - 2019 Jan

Keywords

  • biphenyl/diphenylmethane
  • heterogeneous catalysis
  • hydrogenation
  • organic hydrogen energy carrier
  • sustainable chemistry

ASJC Scopus subject areas

  • Energy(all)

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