Academic Journal
Overlooked pitfalls in CaO carbonation kinetics studies nearby equilibrium: Instrumental effects on calculated kinetic rate constants
| العنوان: | Overlooked pitfalls in CaO carbonation kinetics studies nearby equilibrium: Instrumental effects on calculated kinetic rate constants |
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| المؤلفون: | Juan Arcenegui-Troya, Jonatan D. Durán-Martín, Antonio Perejón, José M. Valverde, Luis A. Pérez Maqueda, Pedro E. Sánchez Jiménez |
| المصدر: | Alexandria Engineering Journal, Vol 61, Iss 8, Pp 6129-6138 (2022) |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2022 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Energy Storage, Calcium-Looping, Concentrated Solar Power, CO2 capture, Kinetics, Calcium Oxide, Engineering (General). Civil engineering (General), TA1-2040 |
| الوصف: | Due to its technological applications, such as CO2 capture, CaO carbonation kinetics has been extensively studied using a wide array of methods and experimental conditions. A complete understanding of carbonation kinetics is key to optimizing the operating conditions as well as to correctly design the carbonation reactor. However, there is yet no consensus on the reaction model and kinetic parameters that can best describe the CaO carbonation reaction. For instance, the value of the activation energy proposed in different works can vary up to 300%. In this work, we demonstrate that the strong influence of the thermodynamic equilibrium on CaO carbonation kinetics demands careful control of the experimental conditions to obtain meaningful kinetic parameters. Specifically, we explore the influence of three experimental parameters on carbonation kinetics: the gas flow rate, the CO2 partial pressure and the time required to fill the reactor after a gas change. We demonstrate that disregarding these aspects may lead to bogus conclusions on reaction kinetics, which could partly explain the considerable discrepancies found in the literature. The conclusions of this work are not only applicable to the process and experimental setup studied here but also to any study that involves the use of gas flow to drive a reaction. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1110-0168 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S1110016821007766; https://doaj.org/toc/1110-0168; https://doaj.org/article/f92918aa6e5842479794470ec843e691 |
| DOI: | 10.1016/j.aej.2021.11.043 |
| الاتاحة: | https://doi.org/10.1016/j.aej.2021.11.043 https://doaj.org/article/f92918aa6e5842479794470ec843e691 |
| رقم الانضمام: | edsbas.C7A09397 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 11100168 |
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| DOI: | 10.1016/j.aej.2021.11.043 |