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Microalgae-based coproduction of ammonia and power employing chemical looping process
Tokyo Inst Technol, Japan.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
State Univ Malang, Indonesia.
ITB, Dept Chem Engn, Indonesia.
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2019 (English)In: Chemical engineering research & design, ISSN 0263-8762, E-ISSN 1744-3563, Vol. 146, p. 311-323Article in journal (Refereed) Published
Abstract [en]

Hydrogen (H-2) production and storage technologies are the main challenges in the realization of H-2 utilization in which the goal is to achieve high conversion efficiencies and a high storage density. In this study, microalgae gasification and ammonia (NH3) production are proposed to efficiently convert microalgae to NH3 for efficient H-2 storage. The integrated system comprises drying, gasification, syngas chemical looping (SCL), NH3 synthesis, and power generation. Microalgae are converted to syngas in the gasification module and then introduced into the SCL module to produce high-purity H-2 and a separated carbon dioxide (CO2) stream. SCL is also employed to produce a nitrogen (N-2)-rich stream, which can replace a conventional air separation unit (ASU) system. The three operating parameters that are evaluated in this study include the steam to biomass (S/B) ratio during gasification, reducer operating temperature during chemical looping, and recycle to feed streams ratio. An increase in the S/B ratio has a negative effect on the total energy efficiency because the efficiency decreases owing to the reduced production of H-2 in the oxidizer. To maximize the efficiency of NH3 production, a higher recycle ratio is favorable. The proposed integrated system can obtain high total energy efficiency of up to 64.3%, comprising 63.8% NH3 production efficiency and 0.05% power generation efficiency. 

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 146, p. 311-323
Keywords [en]
Hydrogen production, Ammonia synthesis, Chemical looping, Gasification, System integration, Energy efficiency
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-254513DOI: 10.1016/j.cherd.2019.04.013ISI: 000471089400027Scopus ID: 2-s2.0-85064866080OAI: oai:DiVA.org:kth-254513DiVA, id: diva2:1336620
Note

QC 20190709

Available from: 2019-07-09 Created: 2019-07-09 Last updated: 2019-07-11Bibliographically approved

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CiteExportLink to record
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  • apa
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