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Hydrogen production by thermochemical sulfur-iodine cycle


Autore: V. Barbarossa, M. Diamanti

Collana: BT - 34 - Mag 06 - Energy: production, distribution and conservation

Hydrogen production by thermochemical cycles is a good way to obtain this value energy carrier without greenhouse gases emission. Thermochemical cycles, realizes the water splitting reaction as a result of a suitable series of sub-reactions.
One of the most studies cycle is the Sulphur-Iodine one that is composed by three reactions:H2SO4 and HI formation from SO2/I2/H2O, mixture and the thermal decompositions of those acids.
In this study we present our investigation on the catalytic thermal decomposition of sulphuric acid in the range 723 1373 K. We use Fe2O3 and Ag/Pd as catalytic materials obtaining a considerable decrease in the decomposition temperature. SO2 conversion yields close the thermodynamic values are measured for H2SO4 partial pressure of 0.15 bar.

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