A Novel Eutectic Mixture of Biphenyl and Diphenylmethane as a Potential Liquid Organic Hydrogen Carrier: Catalytic Hydrogenation. Issue 1 (30th July 2018)

• Record Type: Journal Article
• Authors: Han, Da Jung; Jo, Young Suk; Shin, Byeong Soo; Jang, Munjeong; Kang, Jeong Won; Han, Jong Hee; Nam, Suk Woo; Yoon, Chang Won
• Is Part Of: Energy technology. Volume 7:Issue 1(2019:Jan.)
• Page Start: 113
• Page End: 121
• Publication Date: 2018-07-30
• Subjects: biphenyl/diphenylmethane -- heterogeneous catalysis -- hydrogenation -- organic hydrogen energy carrier -- sustainable chemistry; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201700694
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract: A novel, liquid‐phase hydrogen storage material was produced by mixing biphenyl (C12 H10, solid) and diphenylmethane (C13 H12, 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 %)/Al2 O3 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. Abstract : A novel, liquid‐phase hydrogen storage material was produced by mixing biphenyl (C12 H10, solid) and diphenylmethane (C13 H12, liquid) with a mass ratio (wt %) of 35:65. 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 %)/Al2 O3 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.