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Understanding the Mechanism of Particle Adhesion in High-Temperature Combustion Induced by Sodium and Potassium: Use of a Synthetic Ash Strategy
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-08-24 , DOI: 10.1021/acs.iecr.0c02870 Genki Horiguchi 1 , Ryosuke Fujii 1 , Yuta Beppu 1 , Hidehiro Kamiya 1 , Yohei Okada 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-08-24 , DOI: 10.1021/acs.iecr.0c02870 Genki Horiguchi 1 , Ryosuke Fujii 1 , Yuta Beppu 1 , Hidehiro Kamiya 1 , Yohei Okada 1
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During high-temperature combustion of coal, biomass, and municipal waste, ash particles can agglomerate and adhere to the internal surfaces of the plant under high-temperature conditions, resulting in a decrease in operating efficiency. It is known that the presence of small amounts of Na and K in the ash can facilitate adhesion; however, mechanistic details of the process are unclear. In this paper, a synthetic ash strategy consisting of a base material of SiO2 involving controlled additions of simple chemical components is proposed as a novel and convenient way to investigate adhesion. The synthetic ash consisted of SiO2 as the base material, and trace amounts of Na or K were added as target elements to examine their potential role in facilitating the adhesion process. It became clear that small amounts of Na and K increased the propensity for adhesiveness at high temperatures. The effect of the addition of Al2O3 nanoparticles to the synthetic ashes, which was expected to prevent adhesion, was also investigated. Therefore, it was found that the effect of Al2O3 would depend on the elements, which may increase the adhesiveness. It is projected that the present research can contribute to stable operation of many types of combustion plants.
中文翻译：
了解钠和钾引起的高温燃烧中颗粒粘附的机理：合成灰分策略的使用
在煤炭，生物质和城市垃圾的高温燃烧过程中，灰烬颗粒会在高温条件下结块并粘附在设备的内表面，导致运行效率降低。众所周知，烟灰中少量的Na和K可以促进附着力。但是，该过程的机械细节尚不清楚。在本文中，提出了一种由SiO 2的基础材料组成的合成灰分策略，其中涉及对简单化学成分的控制添加，这是研究粘附性的一种新颖便捷的方法。合成灰由SiO 2组成作为基础材料，并添加了少量的Na或K作为目标元素，以检查它们在促进粘附过程中的潜在作用。清楚的是，少量的Na和K增加了高温下的粘附性。还研究了将Al 2 O 3纳米颗粒添加到合成灰中的效果，该效果有望防止粘附。因此，发现Al 2 O 3的效果将取决于元素，这可以增加粘附性。预计本研究可以为多种类型的燃烧装置的稳定运行做出贡献。
更新日期：2020-09-16
中文翻译：
了解钠和钾引起的高温燃烧中颗粒粘附的机理：合成灰分策略的使用
在煤炭，生物质和城市垃圾的高温燃烧过程中，灰烬颗粒会在高温条件下结块并粘附在设备的内表面，导致运行效率降低。众所周知，烟灰中少量的Na和K可以促进附着力。但是，该过程的机械细节尚不清楚。在本文中，提出了一种由SiO 2的基础材料组成的合成灰分策略，其中涉及对简单化学成分的控制添加，这是研究粘附性的一种新颖便捷的方法。合成灰由SiO 2组成作为基础材料，并添加了少量的Na或K作为目标元素，以检查它们在促进粘附过程中的潜在作用。清楚的是，少量的Na和K增加了高温下的粘附性。还研究了将Al 2 O 3纳米颗粒添加到合成灰中的效果，该效果有望防止粘附。因此，发现Al 2 O 3的效果将取决于元素，这可以增加粘附性。预计本研究可以为多种类型的燃烧装置的稳定运行做出贡献。
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