Improvement of hydrogen sorption measurement using a Sieverts apparatus with consideration of thermal transpiration

• Published in: International journal of hydrogen energy Vol. 38; no. 14; pp. 6241 - 6248
• Main Authors: Cho, Won Chul, Han, Sang Sup, Kang, Kyoung Soo, Bae, Ki Kwang, Kim, Change Hee, Jeong, Seong Uk, Park, Chu Sik
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 10.05.2013; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; Energy; Exact sciences and technology; Fuels; Hydrogen; Hydrogen measurement; PCI curve; Sievets apparatus; Thermal transpiration; PCI curve; Sievets apparatus; Thermal transpiration; Hydrogen measurement; Hydrogen; Measurement; Sorption
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2012.12.057

Improvement of hydrogen sorption measurement using a Sieverts apparatus was performed by considering volumetric change due to the valve movement and the thermal transpiration. The newly suggested measurement method was evaluated by comparing the results from a blank test and a sample test with previous ones. The valve movement was found to be main measurement errors when the measurement temperature was near room temperature. The thermal transpiration became the major sources of errors as the difference between measurement temperature and room temperature increased. The modified equation for the PCI curve in this study gave the best performance compared with the previous ones at all measurement temperatures. These findings suggested the volumetric change due to thermal transpiration as well as the valve movement should be considered for more accurate measurements of hydrogen sorption. ► Novel H2 storage measurement was proposed considering thermal transpiration. ► The errors were observed as the reactor temperature rose or decreased. ► The newly suggested PCI curve equation gave the best performance. ► The thermal transpiration should be considered for more accurate measurements.