Alkali removal with mineral sorbents – Part II: Fixed-bed experiments and model validation
| Autor: | Viktor Handy, Johannes Bolz, Hartmut Spliethoff, Ramona Bier, Isabella Stellwag, F. Kerscher |
|---|---|
| Přispěvatelé: | Lehrstuhl für Energiesysteme |
| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science General Chemical Engineering Sintering Sorption 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Alkali metal ddc Bauxite Solid fuel conversion Alkali removal Mineral sorbents Fixed-bed reactor Sorption modeling 020401 chemical engineering Chemical engineering Bentonite engineering Sample preparation 0204 chemical engineering 0210 nano-technology Porosity |
| Zdroj: | Powder Technology. 389:406-415 |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2021.05.047 |
| Popis: | In this work, alkali capture experiments with three sorbents, kaolin, bauxite and bentonite, are performed in a fixed-bed reactor under industry-oriented conditions. The influence of temperature and sorption duration on the loading curve and the sorption efficiency as well as the influence of the sample preparation and the operating conditions on structural properties of the sorbents are investigated. Regarding the alkali reduction in the gas phase, bauxite and bentonite show higher efficiencies compared to kaolin, although sintering leads to a significant decline of the porous structure of both sorbents. In addition to the experimental studies, a 1-D simulation model of the fixed-bed reactor including kinetic data of the sorbents is developed. The simulated loading curves show a good agreement with the experimental results. This validation confirms the suitability of the kinetic model and the model parameters for the mathematical description of the alkali sorption in industrial processes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect