532
literature data [199, 206–210], the catalysts investigated so far could be broadly
classified into:
• Mixed metal oxide catalysts based on alumina.
• MgO + SiO 2 mixed oxides.
• Metal oxide (Cr 2 O 3 , ZnO, Ta 2 O 5 , NiO, CuO) and metal (Ag, Au)-promoted
MgO + SiO 2 .
Scheme 3 Reaction pathway for two-step ETB process (Reproduced from Kagan et al. [211] and
Vinogradova et al. [212])
Scheme 2 Reaction pathway for single-step ETB process (Reproduced from Kagan et al. [211]
and Vinogradova et al. [212])
R. Vinayagamoorthi et al.
literature data [199, 206–210], the catalysts investigated so far could be broadly
classified into:
• Mixed metal oxide catalysts based on alumina.
• MgO + SiO 2 mixed oxides.
• Metal oxide (Cr 2 O 3 , ZnO, Ta 2 O 5 , NiO, CuO) and metal (Ag, Au)-promoted
MgO + SiO 2 .
Scheme 3 Reaction pathway for two-step ETB process (Reproduced from Kagan et al. [211] and
Vinogradova et al. [212])
Scheme 2 Reaction pathway for single-step ETB process (Reproduced from Kagan et al. [211]
and Vinogradova et al. [212])
R. Vinayagamoorthi et al.