Fabrication of high pressure hydrogen adsorption/desorption unit—Adsorption study on flame synthesized carbon nanofibers

An in-house custom made high pressure adsorption/desorption unit has been designed and fabricated to study reversible hydrogen (H-2) intake capacity, hysteresis, kinetics, plateau pressure of various nanomaterials, zeolites and metallic compounds, in the pressure range of 1 <= P <= 150 atm. The unit has been used to estimate H-2 intake capacity of carbon nanofibers prepared by flame synthesis in the absence of catalyst. H-2 adsorption studies have been carried out in the pressure range of 25-100 atm at 297 K. The maximum H-2 intake capacity has been observed to be 3.7 wt% at 100 atm. (C) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.