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This study investigates how the particle size of silicon affects its combustion behavior.

June 1, 2026Fuel Processing Technology0 citationsOpen Access

Experimental investigation on combustion behavior of pulverized silicon – part 1: Influence of particle size

CBChristian BaumUniversity of Stuttgart JMJörg MaierUniversity of Stuttgart MRMarkus ReinmöllerUniversity of Stuttgart

Key Points

This study investigates how the particle size of silicon affects its combustion behavior.
Conducted ignition tests at 1300 °C in a drop tube reactor.
Utilized a bowl feeder for consistent silicon powder dosing.
Measured temperature changes and electric heater activity during combustion.
Finer silicon particles ignite and oxidize more quickly, leading to higher local temperatures.
NOx levels increase with smaller particle sizes due to faster oxidation rates.
Formation of a SiO₂ layer and agglomeration impacts oxidation progression.

Abstract

• Stable silicon powder ignition at 1300 °C in a drop tube reactor for minutes. • Finer particles oxidise faster, raising local temperature and NOx levels. • Bowl feeder ensures homogeneous, clump-free fuel dosing. • Measurements of temperature and electric heater indicate an exothermic reaction. • SiO₂ layer and agglomeration affect the progress of oxidation.

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