Upgrading waste heat from a cement plant for thermochemical hydrogen production

作者：Odukoya A^*; Naterer G F

来源：International Journal of Hydrogen Energy, 2014, 39(36): 20898-20906.

DOI：10.1016/j.ijhydene.2014.10.096

• Chemical heat pump
• Hydrogen
• Thermochemical
• Electrolysis

A calcium oxide/steam chemical heat pump (CHP) is presented in the study as a means to upgrade waste heat from industrial processes for thermochemical hydrogen production. The CHP is used to upgrade waste heat for the decomposition of copper oxychloride (CuO.CuCl2) in a copper-chlorine (Cu-Cl) thermochemical cycle. A formulation is presented for high temperature steam electrolysis and thermochemical splitting of water using waste heat of a cement plant. Numerical models are presented for verifying the availability of energy for potential waste heat upgrading in cement plants. The optimal hydration and decomposition temperatures for the calcium oxide/steam reversible reaction of 485 K and 565 K respectively are obtained for the combined heat pump and thermochemical cycle. The coefficient of performance and overall efficiency of 4.6 and 47.8% respectively are presented and discussed for the CHP and hydrogen production from the cement plant.

• 出版日期2014-12-12