Han, Da Jung Jo, Young Suk Shin, Byeong Soo Jang, Munjeong Kang, Jeong Won Han, Jong Hee Nam, Suk Woo Yoon, Chang Won 2024-01-19T21:03:31Z 2024-01-19T21:03:31Z 2021-09-04 2019-01 2194-4288 https://pubs.kist.re.kr/handle/201004/120541 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 degrees C and a vapor pressure of 1.4 Pa at 25 degrees 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 degrees C under 50 bar of H-2 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. English WILEY-V C H VERLAG GMBH STORAGE RUTHENIUM RELEASE A Novel Eutectic Mixture of Biphenyl and Diphenylmethane as a Potential Liquid Organic Hydrogen Carrier: Catalytic Hydrogenation Article 10.1002/ente.201700694 1 ENERGY TECHNOLOGY, v.7, no.1, pp.113 - 121 ENERGY TECHNOLOGY 7 1 113 121 scie scopus 000456968400013 2-s2.0-85051038170 Energy & Fuels Energy & Fuels Article STORAGE RUTHENIUM RELEASE biphenyl/diphenylmethane heterogeneous catalysis hydrogenation organic hydrogen energy carrier sustainable chemistry