New material based on manganese oxide with gas generation and high temperature regeneration capacity

New material based on manganese oxide capable of re generating in air at high temperature

Mn2O3 OXIDACIÓN Mn 3O4 N2O2 CO2(CLOU) O2(CLAS/Alm.) REDUCCIÓN AIRE COMBUSTIBLE (CLOU) GAS PORTADOR (CLAS/ ALM .) Q Q O2 MxOy MxOy-1 Schematic of the process of reduction-oxidation of the new materials based on manganese oxides The new material is based on mixtures of metal oxid es with a majority component of manganese oxide (> 80% by weight). It can be prepared from an aqueous suspension containing the corresponding mixture of oxides, using available technologies, such as fluidized bed granulation and subsequent calcination. This new material presents a remarkable improvement with respect to other similar materials used in processes based on reduction-oxidation cycles, such as the po ssibility of regenerating in air at high temperature (800-1000ºC) over succes sive cycles.
This novelty makes it especially attractive for pro cesses involving redox reactions at high temperature (800-1000 ºC). One pr ocess is the so-called combustion technology by chemical loop with decoupl ing of oxygen (CLOU), which allows the combustion of different fu els with inherent capture of the CO 2 generated in the combustion. Another process is th e separation of air by chemical loop (CLAS). It is al so possible to use this type of material in thermochemical energy storage proces ses of renewable origin.

Main innovations and advantages

· Regeneration capacity in air in successive cycles, without losing the ability to release oxygen gas.
· Range of action at temperatures between 800-1000 ºC .
· Avoid the generation of harmful gases such as CO 2.
· Applicable to processes that require the production of pure or nitrogen-free · O 2 · CLOU and CLAS) and in the thermochemical storage of renewable energy · In the CLOU process, t he efficiency of the combustion process increases.