Hydrogen production process: High temperature-stable catalysts for the conversion of SO3 to SO2

Molten copper hexaoxodivanadate: an efficient catalyst for SO3 decomposition in solar thermochemical water splitting cycles

“…We have recently reported that copper pyrovanadate (Cu 2 V 2 O 7 ) is an efficient catalyst for SO 3 decomposition below 650 °C, 8 temperatures at which most conventional oxide catalysts are less active and less stable. [9][10][11][12][13][14][15][16][17][18] The combination of the pyrovanadate (V 2 O 7 2− ) framework, which is resistant to sulfate formation, and a copper redox species achieves both catalytic activity and stability. The catalytic activity can be enhanced by supporting the catalyst on 3-D mesoporous SiO 2 followed by thermal aging above the melting point of Cu 2 V 2 O 7 (>780 °C).…”

Detailed kinetic modeling of homogeneous H2SO4 decomposition in the sulfur–iodine cycle for hydrogen production

“…According to elementary compositions and structures, catalysts can be divided into noble metals (Pt [5,[14][15][16][17][18][19]), transition metal oxides (Fe 2 O 3 [13][14][15][16][20][21][22][23], CuO [5,13,16,23], Cr 2 O 3 [13], etc. ), complex metal oxides (ZnFe 2 O 4 [24], NiFe 2 O 4 [24,25], CuFe 2 O 4 [19,25], Fe 2(1Àx) Cr 2x O 3 (x = 0.0, 0.1, 0.2) [26,27], CuFe-Al 2 O 3 [28], FeTiO 3 [29], CoFe 2 O 4 [25], etc. ), and intermetallic alloys (Ag-Pd [20]).…”

Decomposition of H2SO4 by Direct Solar Radiation

“…[18][19][20][21][22][23][24] Phenomenological kinetic equations for the overall process have been reported in the literature, but a detailed description of the reaction mechanism is missing.…”