Experimental Study of Silica Nano-Powder Synthesis Using a Diffusion Flame Reactor

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
D.P. Mishra ◽  
Anish Upadhaya ◽  
S.S. Panda
Keyword(s):  
Diffusion Flame ◽  
Chemical Reactor ◽  
Tetraethyl Orthosilicate ◽  
Nano Silica ◽  
Powder Synthesis ◽  
Amorphous Form ◽  
Nano Powder ◽  
Flame Reactor ◽  
Flame Burner ◽  
Scanning Electron

A chemical reactor is designed and developed to synthesize silica nano-powders by oxidation of tetraethyl orthosilicate (TEOS) using a three-port diffusion flame burner. Nano-silica powders were successfully synthesized. The particle size of the silica powders were confirmed by AFM and TEM techniques. Scanning electron microscopy (SEM) reveals that as-synthesized silica powders are in agglomerated condition. Phase analysis using XRD shows that the nano-silica in as-prepared condition is in amorphous form. However, during subsequent heat-treatment, it becomes crystalline.

Analysis of preparation of TiO2 particles by diffusion flame reactor for photodegradation of phenol and toluene

2008 ◽  
Vol 34 (4) ◽  
pp. 319-329 ◽  
Author(s):  
Piyabutr Sunsap ◽  
Dong-Joo Kim ◽  
Tawatchai Charinpanitkul ◽  
Kyo-Seon Kim
Keyword(s):  
Diffusion Flame ◽  
Tio2 Particles ◽  
Flame Reactor

Innovative Passive Flame Ameliorator for a Diffusion Flame Burner Using Chevrons

2015 ◽  
Vol 787 ◽  
pp. 732-735
Author(s):  
A. Alaguraja ◽  
S. Balaji ◽  
Inti Sandeep ◽  
M. Karthikeyan ◽  
S. Soma Sundaram
Keyword(s):  
Diffusion Flame ◽  
Acoustic Noise ◽  
Combustion Process ◽  
Ambient Air ◽  
Premixed Flame ◽  
Experimental Investigations ◽  
Exhaust Gas ◽  
Novel Approach ◽  
Flame Burner ◽  
Safety Considerations

Diffusion flame burners are mainly used in industries over premixed flame burners for safety considerations. But the combustion process in a diffusion flame is not complete and the flame is usually in bright yellow in colour in contrast to the premixed flame which gives a bluish flame. To improve the combustion process in a diffusion flame burner a novel approach, using chevrons has been carried out. The chevrons are found to reduce the aero-acoustic noise in the exhaust jets of aircraft engines by allowing better mixing of the exhaust gas with the ambient air. The similar concept is used here where the tips of the burners are cut in the form of chevrons. Experimental investigations are carried out on burners with three and four chevrons in addition to a standard burner using LPG as the fuel. The results indicate that with the introduction of chevrons the diffusion flame becomes more compact. The premixed region, in the diffusion flame, where the air and fuel is mixed well is found to increase by nearly 100 % with the usage of chevrons, indicating better mixing of fuel and air. The results also indicate that increasing the number of chevrons from three to four does not show much variation. Further experiments are to be carried out to determine the improved fuel consumption with the usage of chevrons.

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