Hydrogen Production and Storage by Oxidation and Reduction of Iron-based Oxygen Carriers

Abstract

The fixed-bed chemical-looping hydrogen (CLH) process offers the possibility of decentralised small-scale hydrogen production and storage from local available renewable hydrocarbon sources like biogas. The detailed process simulation indicated the ability of converting a broad range of different bio-based feedstocks into hydrogen.
Experiments for hydrogen production in a lab-scale reactor showed the ability to release high-pressurized hydrogen with up to 50 bar from the fixed-bed production system without an additional gas compression step. Hydrogen with a purity up to 99.999% was produced in the performed lab-scale experiments to meet the stringent requirements for FCEVs. Detailed process simulations for combined loading and unloading of the oxygen carrier with a typical biogas feedstock are presented. The thermodynamic analyses revealed a high influence of the reformer synthesis gas composition and also of the internal recirculation on the overall process efficiency.
The previously loaded oxygen carrier is appropriate as process-integrated storage solution to cover fluctuating demands during the day i.e. for use in fuel stations. A long-term storage and distribution is possible due to the easy handling and the very high volumetric storage capacity compared to conventional tube trailer transportation.

Original document

The different versions of the original document can be found in:

• https://zenodo.org/record/1487657 under the license http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode

• https://zenodo.org/record/1487657,

http://dx.doi.org/10.5281/zenodo.1487656 under the license http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode

• https://zenodo.org/record/1487657,

http://dx.doi.org/10.5281/zenodo.1487657 under the license http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode

DOIS: 10.5281/zenodo.1487657 10.5281/zenodo.1487656