Process for producing and regenerating hydrogen carrier compounds

A process for the production of a liquid siloxane hydrogen carrier compound,

• said process comprising the following consecutive steps:
• providing a silica compound and/or a silicate compound,
• either subjecting the silica compound and/or silicate compound to a reduction step 2(a) to produce silicon monoxide (SiO), or
• subjecting the silica compound and/or silicate compound to an elemental silicon- mediated disproportionation step 2(b) to produce silicon monoxide (SiO), or
• subjecting the silica compound and/or silicate compound to a hydrogenation/dehydration step 2(c) to produce silanone (H2SiO), or
• subjecting the silica compound and/or silicate compound to a partial hydrogenation step 2(d) to produce formosilicic acid (HSi(O)(OH)), or
• subjecting the silica compound and/or silicate compound to a semi-hydrogenation step 2(e) to produce dihydroxysilane (H2Si(OH)2), or
• subjecting the silica compound and/or silicate compound to a full hydrogenation step 2(f) to produce silane (SiH4),
• then
• subjecting silicon monoxide (SiO) obtained from step 2(a) or 2(b) to a hydrogenation step 3(a) to produce silanone (H2SiO), or
• subjecting silicon monoxide (SiO) obtained from steps 2(a) and/or 2(b) to a hydration step 3(b) to produce formosilicic acid (HSi(O)(OH)), and/or
• subjecting formosilicic acid (HSi(O)(OH)) obtained from steps 2(d) and/or 3(b) to a hydrogenation and dehydration step 3(c) to produce silanone (H2SiO), and/or
• subjecting formosilicic acid (HSi(O)(OH)) obtained from steps 2(d) and/or 3(b) to a hydrogenation step 3(d) to produce dihydroxysilane (H2Si (OH)2), and/or
• subjecting silanone (H2SiO) obtained from steps 2(c) and/or 3(a) and/or 3(c) to a hydration step 3(e) to produce dihydroxysilane (H2Si(OH)2), or
• subjecting silane (SiH4) obtained from step 2(f) to a partial hydrolysis step 3(f) to produce dihydroxysilane (H2Si(OH)2), or
• proceeding directly to the next step with the dihydroxysilane (H2Si(OH)2) obtained from step 2(e), or
• proceeding directly to the next step with the silanone (H2SiO) obtained from step 2(c), or
• proceeding directly to the next step with the silane (SiH4) obtained from step 2(f),
• then
• subjecting silanone (H2SiO) obtained from steps 2(c) and/or 3(a) and/or 3(c) to a polyaddition step 4(a) to produce the said liquid siloxane hydrogen carrier compound, or
• subjecting dihydroxysilane (H2Si(OH)2) obtained from steps 2(e) and/or 3(d) and/or 3(e) and/or 3(f) to a polycondensation step 4(b) to produce the said liquid siloxane hydrogen carrier compound, or
• subjecting silane (SiH4) obtained from step 2(f) to an oxygen-mediated partial oxidation step 4(c) to produce the said liquid siloxane hydrogen carrier compound.