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Abstract
In biomass combustion, understanding the effects of chlorine and sulphur release on the release of potassium compounds can help improve and predict the potassium release mechanisms. In this work, a kinetic model is applied to investigate the influences of S and Cl contents on the release of major potassium compounds during combustion. The results indicated that increasing the initial Cl from 3.8 × 10−5 mol/g biomass to 1.5 × 10−4 mol/g biomass promotes the maximum release of HCl and KCl by 518% and 273%, respectively, while inhibits the maximum release of KOH and K2SO4 by 99% and 68%, respectively. Cl in the biomass has directly influence the release of HCl, but indirectly impact the release of KCl; while its existence inhibits the formations of KOH and K2SO4 by adapting the contents of moisture, KO and KSO3. Raising the initial S from 2.7 × 10−5 mol/g biomass to 1.1 × 10−4 mol/g biomass only significantly affects the release of KOH and K2SO4 when temperature exceeds 1300 K, the maximum release of K2SO4 increased by 117%, while the release of KOH shifts from raise to decline. During combustion, S affects the formation and evaporation of K2SO4 by controlling the formations of intermediate S species. The results showed the model can accurately predict the major potassium compounds in various scenarios, and support the improvement of ash control technologies.
Original language | English |
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Pages (from-to) | 178-186 |
Number of pages | 9 |
Journal | Journal of the Energy Institute |
Volume | 101 |
Early online date | 22 Jan 2022 |
DOIs | |
Publication status | Published - 30 Apr 2022 |
Keywords
- Biomass combustion
- Potassium compounds
- Sulphur and chlorine
- Kinetic model
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- 2 Finished
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Atomic Level investigation on developing optimal pathways for liquid biofuels (Transfer from QUB)
1/07/19 → 30/06/20
Project: Research