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This article describes gas hydrates formation, with methane and carbon dioxide as guest compounds, in a small-scale experimental apparatus, appositely designed to reproduce marine offshore reservoirs. The sediment consisted of pure quartz porous sand impregnated with FeSi3 particles, which are produced via gas-atomization and are usually destined to applications in additive manufacturing. Experimental results were compared with the theoretical equilibrium conditions for both types of hydrates. It was established t...