Alkali removal with mineral sorbents – Part I: Sorption capacity and reaction kinetics
| Autor: | Hartmut Spliethoff, F. Kerscher |
|---|---|
| Přispěvatelé: | Lehrstuhl für Energiesysteme |
| Rok vydání: | 2021 |
| Předmět: |
Flue gas
Sorbent Materials science General Chemical Engineering Sorption 02 engineering and technology Solid fuel conversion Alkali removal Mineral sorbents Kinetic studies Thermogravimetric analysis engineering.material 021001 nanoscience & nanotechnology Solid fuel ddc Bauxite 020401 chemical engineering Chemical engineering Aluminosilicate Bentonite engineering 0204 chemical engineering 0210 nano-technology Syngas |
| Zdroj: | Powder Technology. 390:190-196 |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2021.05.074 |
| Popis: | Aluminosilicate sorbents show the potential to reduce alkali-related problems during solid fuel conversion such as deposit build-up and corrosion damages. The alkali capacity, the reaction kinetics and the surface area development of the sorbents under operating conditions are essential parameters for the mathematical description of the alkali sorption. In this work, three sorbents, kaolin, bauxite and bentonite, are characterized in this regard by thermogravimetric analysis. The sorption behavior of kaolin surpasses the other sorbents due to the highest loading capacity and the temperature-stability of the porous structure. However, the suitability as sorbent in solid fuel conversion processes is given for all materials. A mathematical sorption model is applied to the experimental data in order to derive kinetic parameters of the sodium and potassium sorption under syngas and flue gas atmosphere. Thus, this work provides the necessary dataset for the design and optimization of the sorbent use in industrial processes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect