ZSM-5 zeolite possesses a three-dimensional network of microporous channels formed by oxygen-linked Si and Al tetrahedra, which confers a high surface area, stability, and hydrophobic properties that increase with the Si/Al ratio. These characteristics make ZSM-5 a suitable material for the adsorption of gases such as hydrogen. In pure ZSM-5, hydrogen storage occurs primarily through physisorption in the micropores, exhibiting type I isotherms and an adsorption capacity that increases with pressure, especially at low temperatures. The relatively low adsorption energy indicates weak interactions that keep the hydrogen in a molecular state and allow for its reversible release. However, the sto... More >

Biodiesel has evolved from a niche alternative fuel into a strategic component of global decarbonization and energy diversification efforts. Its compatibility with existing engines, low sulfur content, and potential integration within circular bioeconomy frameworks position biodiesel as a relevant contributor to renewable energy transitions, particularly in regions with strong agricultural and agro-industrial sectors. Despite substantial progress in feedstock diversification, catalytic innovation, and process intensification, biodiesel production continues to face persistent challenges related to cost competitiveness, sustainability metrics, land use pressures, and scalability. This Perspect... More >