Mechanistic Determination of the Role of Aluminum in Particle Adhesiveness at High Temperatures Induced by Sodium and Potassium Using a Synthetic Ash StrategyClick to copy article linkArticle link copied!
- Genki HoriguchiGenki HoriguchiDepartment of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, JapanMore by Genki Horiguchi
- Yuta BeppuYuta BeppuDepartment of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, JapanMore by Yuta Beppu
- Kentaro YoshinagaKentaro YoshinagaDepartment of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, JapanMore by Kentaro Yoshinaga
- Hidehiro KamiyaHidehiro KamiyaDepartment of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, JapanMore by Hidehiro Kamiya
- Yohei Okada*Yohei Okada*Email: [email protected]Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, JapanMore by Yohei Okada
Abstract

Energy recovery from various fuels with high efficiency is an important objective to realize sustainable energy conversion systems. During the combustion process, ash particles are produced that can form aggregates inside of combustion plants, which inhibit stable and effective plant operation. This is a serious problem for plant operation, and the control of ash particle aggregation under high-temperature conditions is an important objective. In this research, a method to effectively suppress the adhesiveness of particles at high temperatures is proposed based on a synthetic ash strategy. Synthetic ashes were prepared from a base material with sodium (Na) or potassium (K) as target elements to induce adhesiveness. The base material included both silicon (Si) and aluminum (Al). The tensile strengths of powder beds of the prepared synthetic ash with various alkali concentrations were measured at high temperatures, by which it was confirmed that Na could induce higher adhesiveness than K at low alkali concentrations. This difference was ascribed to the presence of Al. The role of Al in particle adhesiveness was clarified by control of the Al concentration through the addition of aluminum oxide (Al2O3) nanoparticles, and the ratio of alkali to Al (Na/Al or K/Al) had an effect on particle adhesiveness at high temperatures, that is, the particle adhesiveness could be suppressed by a decrease of these ratios.
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This article is cited by 10 publications.
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, 4655-4661. https://doi.org/10.1021/acssuschemeng.3c08419
- Tatsuya Okuizumi, Genki Horiguchi, Hidehiro Kamiya, Yohei Okada. Role of Al-Based Additives in Controlling Ash Adhesion. Energy & Fuels 2024, 38
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, 2319-2326. https://doi.org/10.1021/acs.energyfuels.3c03942
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- Genki Horiguchi, Masahiro Ito, Atsuki Ito, Hidehiro Kamiya, Yohei Okada. Role of Phosphorus and Iron in Particle Adhesiveness at High Temperatures Using Synthetic Ashes. ACS Sustainable Chemistry & Engineering 2021, 9
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- Tsuyoshi Fujimoto, Genki Horiguchi, Hidehiro Kamiya, Yohei Okada. Understanding adhesion induced by calcium compounds at 900 °C using model particles. Powder Technology 2024, 8 , 120008. https://doi.org/10.1016/j.powtec.2024.120008
- Genki HORIGUCHI. Investigation of Additives to Control Ash Adhesion at High Temperatures. Hosokawa Powder Technology Foundation ANNUAL REPORT 2024, 31
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, 134-139. https://doi.org/10.14356/hptf.21120
- Genki Horiguchi, Masahiro Ito, Atsuki Ito, Hidehiro Kamiya, Yohei Okada. Controlling particle adhesion of synthetic and sewage sludge ashes in high temperature combustion using metal oxide nanoparticles. Fuel 2022, 321 , 124110. https://doi.org/10.1016/j.fuel.2022.124110
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- Congwei Tang, Weiguo Pan, Jiakai Zhang, Wenhuan Wang, Xiaoli Sun. A comprehensive review on efficient utilization methods of High-alkali coals combustion in boilers. Fuel 2022, 316 , 123269. https://doi.org/10.1016/j.fuel.2022.123269
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