Synthesis, Characterization and Hydrogen storage application of an Activated Carbon derivated from orange peels waste

JUAREZ, JULIANA; BRENDA C. LEDESMA; ANUNZIATA OSCAR; GOMEZ COSTA, MARCOS; ANDREA BELTRAMONE

Congreso; 32nd International Conference on Diamond and Carbon Materials (ICDCM); 2022

The recovery and reuse of orange peel waste (OP) is a sustainable strategy in a circulareconomy. In this research, OP was used as the raw material for the preparation of a novelcarbonaceous nanomaterial to be used in the adsorption of hydrogen as an alternative in theuse of green hydrogen. Activated carbons were synthesized from orange peel using differentsynthesis conditions. The activation of the carbon was carried out by means of a chemicalprocess with phosphoric acid as activating agent, varying the the activating agent/precursorratio, and the contact time between them. The activating agent used is a solution ofphosphoric acid (50 wt %) in different weight ratios of acid/precursor of 3:1 or 6:1, with restingtime of 24 hours. The best support was obtained using a carbonization time of 1 h, acarbonization temperature of 470 , 6:1 precursor/acid ratio and 24 hours of resting time.According XRD analysis all samples present amorphous structure of activated carbons withBET surface areas of 1000 to 1400 m /g. With the activated carbons obtained with the beststructure and texture, the adsorption of hydrogen and the effects on their meso /microporosity were studied. Said material significantly improved H storage behaviourcompared to CMK-3 type nanostructured carbon (3.1% by weight at -196,15 C and 10 bar).The synthesized material shows promise in absorbing hydrogen by weak binding forces(physisorption).