Abstract
Hydrogen Production by Solar Thermochemical Water-Splitting Cycle via a Beam Down Concentrator
Highlights
About 95% of the hydrogen presently produced is from natural gas and coal, and the remaining 5% is generated as a by-product from the production of chlorine through electrolysis1
The easiest approach to advance renewable energy production is through solar photovoltaic and electrolysis, a pathway of high technology readiness level (TRL) suffering, from two downfalls
Production of hydrogen using the current best processes for water electrolysis has an efficiency of ∼70%
Summary
About 95% of the hydrogen presently produced is from natural gas and coal, and the remaining 5% is generated as a by-product from the production of chlorine through electrolysis. Solar thermochemical water-splitting cycles (TWSCs) use high-temperature solar heat to drive a series of reactions producing hydrogen with oxygen as a welcomed by-product (Safari and Dincer, 2020). The environment is, corrosive on the reactor side, and the supply of high-temperature solar heat is challenging This cycle has been extensively studied (Norman et al, 1982; Anzieu et al, 2006; Vitart et al, 2006; Zhou et al, 2007; Cerri et al, 2010; Zhang et al, 2010; Liberatore et al, 2012; Park et al, 2019), with technological advances still needed. Opposite to direct solar thermochemical water splitting into an integrated receiver/reactor (Chueh et al, 2010) presently featuring a very low TRL, the TRL of the indirect solar thermochemical hydrogen production is medium
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