Study of the Methane Chemical Looping Combustion Process Using Supported Metal Carriers for Carbon Capture
Notice bibliographique
Résumé
Global warming caused by greenhouse gases (GHGs) has in the recent years become a great concern internationally. Recent changes in weather patterns can be attributed as one of the possible results of global warming. The emission portion of carbon dioxide (CO2) is one of the highest among the GHGs. Accordingly, carbon capture technology is needed to decrease CO2 emission to the atmosphere. The Chemical Looping Combustion (CLC) process is an alternative and immature process to capture CO2. This process produces a concentrated stream of CO2 that does not require any further expensive separation unit. To commercialize this technology, this thesis presents a comprehensive study of the methane CLC process using supported mixed metals oxygen carriers. In the first part of the study, synthesis and reactivity evaluation of monometallic carriers were conducted, assessing and discussing the effect of various operating conditions on reactivity. Interaction between monometallic precursors (Ni & Co) and alumina support was observed, resulting in forming intermediate phases such as CoAl2O4 and NiAl2O4; the CoAl2O4 phase was successfully reduced but the NiAl2O4 did not reduce. By varying the temperature (800°C-950°C), the highest observable oxygen capacity for all 16 samples was found to be between 900°C and 950°C. In the second part of the study, optimum operating conditions obtained previously were applied to the supported bimetallic carriers, leading to novel findings. The redox reactions pathways were determined, with a main conclusion being that once the chemical stability between precursors and supports maximized, negligible interaction could be anticipated. The Ni-Co/ZrO2, Ni-Cu/ZrO2, and Ni-Fe/ZrO2 samples showed stable oxygen capacities compared to others and negligible interaction between precursors and supports. In the last part of the study, Aspen Plus computer software was used to examine the feasibility and sustainability of the process. It was found that the loading percentage of precursor (Ni-Cu/ZrO2) showed no significant effect on conversion in the fuel reactor, but conversion increased by 39% in the air reactor. Finally, the case study was compared with other competing processes. The overall efficiency of the case study was found to be higher than that of the competing processes, suggesting its potential for commercialization.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».