Hydrogen is not easy to find in nature and can be produced from renewable sources through photoelectrochemical methods, biological processes and eolic energy. Some of the wastes used in activated carbon (AC) preparation are: almond shell, hazelnut shell, olive stone, coffee grounds, coconut shell, rachis of chicken feathers, among others. Chemical or physical activation is used in the preparation of AC to obtain surface areas between 200–1200 m2/g, but its values depend on the precursor composition and activation method.
Hydrogen storage is related to high surface areas of adsorbents, that is, high microporosity percentage. The AC obtained from agro-industrial wastes show different adsorption capacities by weight. The adsorption is due to van der Waals forces and is important in this type of system.
In this chapter, the aim is to compare different ACs obtained from agro-industrial wastes in hydrogen storage to evaluate its efficiency in relation to the precursors used.
Keywords: Hydrogen storage, activated carbon, ...