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Syngas Production in a 1.5 kW(th) Biomass Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen Carrier
[Image: see text] Biomass chemical looping gasification (BCLG) uses lattice oxygen from an oxygen carrier instead of gaseous oxygen for high-quality syngas production without CO(2) emissions. In this work, the effect of the main operating variables, such as oxygen/biomass ratio (λ), gasification tem...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8573825/ https://www.ncbi.nlm.nih.gov/pubmed/34764543 http://dx.doi.org/10.1021/acs.energyfuels.1c01878 |
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author | Condori, Oscar de Diego, Luis Francisco Garcia-Labiano, Francisco Izquierdo, María Teresa Abad, Alberto Adánez, Juan |
author_facet | Condori, Oscar de Diego, Luis Francisco Garcia-Labiano, Francisco Izquierdo, María Teresa Abad, Alberto Adánez, Juan |
author_sort | Condori, Oscar |
collection | PubMed |
description | [Image: see text] Biomass chemical looping gasification (BCLG) uses lattice oxygen from an oxygen carrier instead of gaseous oxygen for high-quality syngas production without CO(2) emissions. In this work, the effect of the main operating variables, such as oxygen/biomass ratio (λ), gasification temperature, and steam/biomass ratio (S/B), was investigated using two low-cost materials: a Fe ore and a Mn ore. Oxygen fed to the air reactor for oxidation was used as an effective method for controlling the amount of lattice oxygen used for syngas production. The main variable that affected the process performance and the syngas quality was λ, while the fuel reactor temperature and the S/B ratio had a minor effect. Small performance differences found between the ores can be attributed to different degrees of CH(4) and light hydrocarbons reforming in the process. The CO(2) content in the syngas was high (40 −43%) under autothermal conditions because the gasification reactions required the heat to be generated by combustion. CH(4) contents of around 10% were found in syngas, coming from the unburned or unreformed volatiles. Syngas yields around 0.60 Nm(3)/kg of dry biomass were found for both ores. Additionally, high biomass conversions (X(b) > 94%) and carbon conversion efficiencies (η(cc) > 95%) were obtained in all cases, showing the capability of the process of avoiding CO(2) emissions to the atmosphere. No agglomeration was found in the bed during the BCLG process, although attrition rates were high, leading to lifetimes of 160 and 300 h for the manganese and iron ores, respectively. Migration of Fe or Mn to the external part of the particle, generating a metal concentrated shell, was observed. Its detachment was responsible for the decrease in the oxygen transport capacity (R(OC)) of the material with the operating time and the reduced lifetime. The results obtained here allowed the iron ore to be considered as an oxygen carrier suitable for the BCLG process. |
format | Online Article Text |
id | pubmed-8573825 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-85738252021-11-09 Syngas Production in a 1.5 kW(th) Biomass Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen Carrier Condori, Oscar de Diego, Luis Francisco Garcia-Labiano, Francisco Izquierdo, María Teresa Abad, Alberto Adánez, Juan Energy Fuels [Image: see text] Biomass chemical looping gasification (BCLG) uses lattice oxygen from an oxygen carrier instead of gaseous oxygen for high-quality syngas production without CO(2) emissions. In this work, the effect of the main operating variables, such as oxygen/biomass ratio (λ), gasification temperature, and steam/biomass ratio (S/B), was investigated using two low-cost materials: a Fe ore and a Mn ore. Oxygen fed to the air reactor for oxidation was used as an effective method for controlling the amount of lattice oxygen used for syngas production. The main variable that affected the process performance and the syngas quality was λ, while the fuel reactor temperature and the S/B ratio had a minor effect. Small performance differences found between the ores can be attributed to different degrees of CH(4) and light hydrocarbons reforming in the process. The CO(2) content in the syngas was high (40 −43%) under autothermal conditions because the gasification reactions required the heat to be generated by combustion. CH(4) contents of around 10% were found in syngas, coming from the unburned or unreformed volatiles. Syngas yields around 0.60 Nm(3)/kg of dry biomass were found for both ores. Additionally, high biomass conversions (X(b) > 94%) and carbon conversion efficiencies (η(cc) > 95%) were obtained in all cases, showing the capability of the process of avoiding CO(2) emissions to the atmosphere. No agglomeration was found in the bed during the BCLG process, although attrition rates were high, leading to lifetimes of 160 and 300 h for the manganese and iron ores, respectively. Migration of Fe or Mn to the external part of the particle, generating a metal concentrated shell, was observed. Its detachment was responsible for the decrease in the oxygen transport capacity (R(OC)) of the material with the operating time and the reduced lifetime. The results obtained here allowed the iron ore to be considered as an oxygen carrier suitable for the BCLG process. American Chemical Society 2021-08-17 2021-11-04 /pmc/articles/PMC8573825/ /pubmed/34764543 http://dx.doi.org/10.1021/acs.energyfuels.1c01878 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Condori, Oscar de Diego, Luis Francisco Garcia-Labiano, Francisco Izquierdo, María Teresa Abad, Alberto Adánez, Juan Syngas Production in a 1.5 kW(th) Biomass Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen Carrier |
title | Syngas Production in a 1.5 kW(th) Biomass
Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen
Carrier |
title_full | Syngas Production in a 1.5 kW(th) Biomass
Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen
Carrier |
title_fullStr | Syngas Production in a 1.5 kW(th) Biomass
Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen
Carrier |
title_full_unstemmed | Syngas Production in a 1.5 kW(th) Biomass
Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen
Carrier |
title_short | Syngas Production in a 1.5 kW(th) Biomass
Chemical Looping Gasification Unit Using Fe and Mn Ores as the Oxygen
Carrier |
title_sort | syngas production in a 1.5 kw(th) biomass
chemical looping gasification unit using fe and mn ores as the oxygen
carrier |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8573825/ https://www.ncbi.nlm.nih.gov/pubmed/34764543 http://dx.doi.org/10.1021/acs.energyfuels.1c01878 |
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