A sieverts apparatus for measuring high-pressure hydrogen isotherms on porous materials. (3rd August 2017)

• Record Type: Journal Article
• Authors: Pyle, D.S.; Gray, E.MacA.; Webb, C.J.
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 31(2017)
• Page Start: 20111
• Page End: 20119
• Publication Date: 2017-08-03
• Subjects: Sieverts apparatus -- Hydrogen storage -- High pressure -- Porous materials -- Piston compressor; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.06.126
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A high-pressure Sieverts apparatus, specifically designed to investigate carbon and other low-density materials for hydrogen storage, has been constructed and used to investigate potential storage materials for which the volume of the sample is uncertain or difficult to define. The apparatus can be managed from a computer via a graphical interface and used to measure gas sorption isotherms from 77 K to 873 K, utilising a computer driven piston pressure booster to compress the gas to 340 bar. Based on measurements of activated carbons and graphene-like samples, this article demonstrates the low sensitivity of the apparatus to uncertainty in the sample volume and the quality of data obtained for H2 adsorption isotherms measured at 296 K and 77 K at pressures up to 300 bar. Highlights: Sieverts instrument designed specifically for low density porous materials. Full design and components for 340 bar operation. Hydrogen compressor (syringe pump) without leaks. Instrument validation and sample isotherms.