Industrial waste heat recovery with novel thermochemical heat storage

The topic „Thermochemical Energy Storage“ covers in project Tes4Set on the one hand adsorption reactions by use of synthetic or natural zeolites, on the other hand materials are analysed, where reversible chemical reactions are the basis for heat storage and release. Typical reactions are the dehydration of Mg(OH)2 (storage) and the hydration of MgO for heat release:

Mg(OH)2MgO+H2O (heat storage )
MgO+H2OMg(OH)2 (heat release)

In theory the amount of stored or released energy is equal to the reaction enthalpy of the reacting educts and products. Additionally heat losses e. g. due to convection and radiation have to be covered.

Thermochemical reactor with storage tanks and tubing

Thermochemical reactor with storage tanks and tubing

Scheme of a fluidized bed reactor for the dehydration of Mg(OH)2

Scheme of a fluidized bed reactor for the dehydration of Mg(OH)2