Quantifying the hydrogen storage capacity of new materials is a key technology for predicting the performance in a fuel cell or hydrogen storage device. The Micromeritics ASAP 2020 is a flexible gas adsorption analyzer capable of measuring the hydrogen adsorption capacity of powders and porous materials.
Software For Hydrogen Researchers
The ASAP 2020 software has been enhanced to address the needs of fuel cell and hydrogen storage researchers. The following enhancements were introduced in Version 3 of the ASAP 2020 software:
· Absolute pressure dosing for non-condensing probe molecules like hydrogen.
· New isotherm reports that include the weight percent of hydrogen adsorbed and the Pressure Composition Isotherm that is frequently used by hydrogen storage researchers.
· Calculated Free-space options to reduce analysis time, improve precision, and minimize exposure to interfering gases like helium.
A successful hydrogen adsorption analysis requires proper sample preparation, which is a two-step process. First, samples should be degassed on the preparation port to remove moisture and stray gases like CO2 that sorb strongly to many materials at ambient temperature and pressure. Second, the sample should be degassed thoroughly on the sample port.
The standard ASAP 2020 sample tube (1/2-inch stem) with a seal frit is recommended for this type of analysis. An isothermal jacket is recommended if the analysis is conducted at cryogenic temperatures (liquid nitrogen or liquid argon). A filler rod is optional but not recommended if the analysis is performed at cryogenic temperatures; the filler rod may interfere with the precision of low-pressure measurements.