Cheap H2 production by H20 low temperature thermolysis

A cost of primary energy of Solar and Wind in the order of magnitude can be cheapened by reducing their frontal dimension down to about 1.0 m2 unit, so such units are thinner proportionally and is negligible vs. a cost of electric generators being a lion's share per kilowatt, and cheaper than 0.5 UScent/kWh. [1]. (1) Al2O3 + 3 H2O = 2 Al(OH)3, heating and pressure 10 - 100 bars. 2 Al(OH)3 + k * (H2O = H2 + 0.5 O2) + Al2O3 + 3 H2O. All reagents are circular here, so they are practically free. Total energy consume is energy for the water thermolysis only, and at k = 1, being a heat of 242 kJ/mol H2 at T = > (150 + k * 242) / (450 + k * 54) = 500 C. vs. 2500 C conventional. If k = 0.5, T => 300 C. H2 product can be 242 kJ * 10^6 * 0.004 /3600 sec./2 = USD 133 /ton H2, (2) Catalyst: CO2 + H2 = HCOOH - formic acid. Joint target reaction: HCOOH + 0.4 * (H2O = H2 + 0.5 O2) + CO2 + H2. dH = 32 + 0.4 * 242 = 128 kJ. dS = 214 + 0.4 * (131 + 102 - 180) = 234. dG = 128 - 234 * T < 0, and T > 274 C. Because all reagents here are circular and practically free, so OPEX cost of the hydrogen is about USD 70 /ton H2. References. [1] 2021 Annual Meeting. (397e) Cheap Energy is a Key to Competitive Artificial Fuels. www.aiche.org/conferences-events . David Judbarovski, systems engineering.principle inventor, retired. judbarovski.blogspot.com, judbarovski@gmail.com

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