In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications

A novel Al-Fe-Mn-Cu oxide oxygen carrier, termed Gen3, was developed by NETL and prepared using natural ore and pigment grade materials. Gen3 was subjected to 10 cycles of reduction-oxidation (redox) through confocal laser scanning microscopy (CLSM) and thermogravimetric analysis (TGA), separately....

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Autores principales:	Kristin Tippey, Anna Nakano, Jinichiro Nakano, W. Harrison Nealley, Ömer N. Doğan
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Oxygen carriers Spinel Chemical looping combustion Thermogravimetric analysis Confocal laser scanning microscopy Porosity Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/e458d7d8601340b88b97388b7ecb815f
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spelling	oai:doaj.org-article:e458d7d8601340b88b97388b7ecb815f2021-11-20T05:15:16ZIn-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications2666-821110.1016/j.ceja.2021.100203https://doaj.org/article/e458d7d8601340b88b97388b7ecb815f2022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121001186https://doaj.org/toc/2666-8211A novel Al-Fe-Mn-Cu oxide oxygen carrier, termed Gen3, was developed by NETL and prepared using natural ore and pigment grade materials. Gen3 was subjected to 10 cycles of reduction-oxidation (redox) through confocal laser scanning microscopy (CLSM) and thermogravimetric analysis (TGA), separately. TGA results indicated that Gen3 shows promise as an oxygen carrier, repeatably lending approximately 6% of its mass to oxygen carrying capacity. CLSM characterization led to the identification of different swelling behaviors among particles of ‘smooth’ (spinel-S) vs. ‘rough’ (spinel-R) surface morphologies, labeled based on appearance before redox cycling. Spinel-R particles exhibited homogeneous chemistry and porosity. Spinel-S particles showed much more localized porosity, specific to high-Cu areas. Gen3 particle volume increased 60% for spinel-S particles and 30% for spinel-R particles over the course of 10 redox cycles. All conditions showed some degree of separation of the complex Al-Fe-Mn-Cu spinel. Primary observed phases included Al-rich spinel, Fe-rich spinel, and Cu/CuO. Al-rich spinel and Cu/CuO in exposed Gen3 at times formed a lamellar structure of alternating Al-rich and Cu-rich layers in exposed Gen3 near areas rich in Cu. An additional Si-O-K-type phase was also observed that likely arose from the impurities involved in pigment grade materials and natural ores. Segregation increased with level of exposure. Si-rich regions and Fe-rich spinels showed extremely low porosity; a more evenly mixed Al-Fe-Mn-Cu spinel showed moderate porosity; Cu and Cu-rich spinel by far showed the highest porosity.Kristin TippeyAnna NakanoJinichiro NakanoW. Harrison NealleyÖmer N. DoğanElsevierarticleOxygen carriersSpinelChemical looping combustionThermogravimetric analysisConfocal laser scanning microscopyPorosityChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 9, Iss , Pp 100203- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Oxygen carriers Spinel Chemical looping combustion Thermogravimetric analysis Confocal laser scanning microscopy Porosity Chemical engineering TP155-156
spellingShingle	Oxygen carriers Spinel Chemical looping combustion Thermogravimetric analysis Confocal laser scanning microscopy Porosity Chemical engineering TP155-156 Kristin Tippey Anna Nakano Jinichiro Nakano W. Harrison Nealley Ömer N. Doğan In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications
description	A novel Al-Fe-Mn-Cu oxide oxygen carrier, termed Gen3, was developed by NETL and prepared using natural ore and pigment grade materials. Gen3 was subjected to 10 cycles of reduction-oxidation (redox) through confocal laser scanning microscopy (CLSM) and thermogravimetric analysis (TGA), separately. TGA results indicated that Gen3 shows promise as an oxygen carrier, repeatably lending approximately 6% of its mass to oxygen carrying capacity. CLSM characterization led to the identification of different swelling behaviors among particles of ‘smooth’ (spinel-S) vs. ‘rough’ (spinel-R) surface morphologies, labeled based on appearance before redox cycling. Spinel-R particles exhibited homogeneous chemistry and porosity. Spinel-S particles showed much more localized porosity, specific to high-Cu areas. Gen3 particle volume increased 60% for spinel-S particles and 30% for spinel-R particles over the course of 10 redox cycles. All conditions showed some degree of separation of the complex Al-Fe-Mn-Cu spinel. Primary observed phases included Al-rich spinel, Fe-rich spinel, and Cu/CuO. Al-rich spinel and Cu/CuO in exposed Gen3 at times formed a lamellar structure of alternating Al-rich and Cu-rich layers in exposed Gen3 near areas rich in Cu. An additional Si-O-K-type phase was also observed that likely arose from the impurities involved in pigment grade materials and natural ores. Segregation increased with level of exposure. Si-rich regions and Fe-rich spinels showed extremely low porosity; a more evenly mixed Al-Fe-Mn-Cu spinel showed moderate porosity; Cu and Cu-rich spinel by far showed the highest porosity.
format	article
author	Kristin Tippey Anna Nakano Jinichiro Nakano W. Harrison Nealley Ömer N. Doğan
author_facet	Kristin Tippey Anna Nakano Jinichiro Nakano W. Harrison Nealley Ömer N. Doğan
author_sort	Kristin Tippey
title	In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications
title_short	In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications
title_full	In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications
title_fullStr	In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications
title_full_unstemmed	In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications
title_sort	in-situ analysis of the al-fe-mn-cu oxide oxygen carrier for chemical looping applications
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/e458d7d8601340b88b97388b7ecb815f
work_keys_str_mv	AT kristintippey insituanalysisofthealfemncuoxideoxygencarrierforchemicalloopingapplications AT annanakano insituanalysisofthealfemncuoxideoxygencarrierforchemicalloopingapplications AT jinichironakano insituanalysisofthealfemncuoxideoxygencarrierforchemicalloopingapplications AT wharrisonnealley insituanalysisofthealfemncuoxideoxygencarrierforchemicalloopingapplications AT omerndogan insituanalysisofthealfemncuoxideoxygencarrierforchemicalloopingapplications
_version_	1718419515220426752

In-situ analysis of the Al-Fe-Mn-Cu oxide oxygen carrier for chemical looping applications

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