Publication Details
Abstract
High fuel consumption due to high energy demand has resulted in the use of hydrogen gas as a fuel H2 (gas) can be stored physically as either a liquid or a gas. In order to store H2 (gas) as a gas, high-pressure tanks are frequently required (tank pressure of 350–700 bar, or 5,000–10,000 psi). With a boiling point of 252.8 °C at one atmosphere of pressure, H2 (gas) requires cryogenic temperatures to be stored as a liquid. H2 can also be retained in solids or on their surfaces (via adsorption/absorption). H2 (gas) storage is a key enabling technology for the development of H2 (gas) and fuel cell technologies in industries like fixed power, portable power, and mobility. The development of novel storage technologies with the potential for better energy density is required since H2 (gas), despite having the highest energy density per mass of any fuel, has the lowest energy density per unit volume due to its low ambient temperature density. The absence of practical, affordable, and secure H2 storage solutions restricts the use of H2 (gas) as a fuel. The Schiff bases showed a tiny Brunauer-Emmett-Teller surface area (4.9-10.8 m2/g), typical pore diameters of (1.67 to 3.353 nm), and pore volumes ranging from 0.005 to 0.036 cm3/g. At 77 K and 40 bars, the Schiff bases demonstrated impressive H2 uptake (0.050377mmol/g), volume of H2 uptake by Absorbed (1.129143cm3/g,STP) the high uptake appear in Schiff base with the 4-nitrophenyl substituent but Schiff base with the hydroxyl substituent appear H2 uptake (0.002775mmol/g), volume of H2 uptake by Absorbed (0.062193 cm3/g,STP) . Because it was the most effective medium for H2 adsorption, the Schiff base with the 4-nitrophenyl substituent can be employed as a gas sorbent.