Analysis on premixed combustion of H-2-CH4 mixed fuels for SiO2 particle preparation

作者：Nasonova Anna; Kim Kyo Seon^*

来源：Chemical Engineering Journal, 2013, 215: 389-395.

DOI：10.1016/j.cej.2012.11.021

• Premixed combustion
• Mixed H-2 and CH4 fuels
• Preparation of SiO2 particles
• Particle trajectories
• Temperature histories of particles

The combustion of premixed H-2 and CH4 fuels to prepare SiO2 nanoparticles was analyzed numerically. The commercial CFD-code Fluent was used to calculate the profiles of gas velocities, temperature, species concentrations and reaction rates for various process conditions in the premixed flame reactor. To understand the effect of CH4 addition to H-2 fuel, the CH4 mole fraction was changed from 0% to 10%, while keeping the H-2 concentration constant. With the increase of CH4 concentration, flame temperature increases, which will affect the properties of SiO2 particles prepared in premixed flame reactor. Using the data of gas temperatures and velocities extracted from Fluent, the trajectories and temperature histories of SiO2 particles were calculated inside the premixed flame reactor. This study shows that particles starting at different initial positions move inside the reactor with different particle trajectories and have different temperature histories, and the properties of SiO2 nanoparticles prepared in the premixed flame reactor will depend on those process variables significantly.

• 出版日期2013-1-15