Lu Plot and Yao Plot: Models To Analyze Product Distribution of Long-Term Gas-Phase Fischer–Tropsch Synthesis Experimental Data on an Iron Catalyst

2017 ◽  
Vol 31 (5) ◽  
pp. 5682-5690 ◽  
Author(s):  
Joshua Gorimbo ◽  
Adolph Muleja ◽  
Xiaojun Lu ◽  
Yali Yao ◽  
Xinying Liu ◽  
...  
Keyword(s):  
Experimental Data ◽  
Gas Phase ◽  
Iron Catalyst ◽  
Product Distribution ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

Methane Formation in Fischer-Tropsch Synthesis: Role of Nanosized Catalyst Particles

2015 ◽  
Vol 35 ◽  
pp. 39-54 ◽  
Author(s):  
Ali Nakhaei Pour ◽  
Seyed Majed Modaresi
Keyword(s):  
Surface Tension ◽  
Gas Phase ◽  
Iron Catalyst ◽  
Iron Carbide ◽  
Tropsch Synthesis ◽  
Experimental Results ◽  
Methane Formation ◽  
Iron Oxide Particles ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

Concepts of the surface excess energy in the present work have been applied to explain the methane formation in Fischer-Tropsch synthesis by iron catalysts. A series of iron oxide particles doped by adding copper and lanthanum were prepared as a catalyst via precipitation by microemulsion method. Size dependent kinetic expressions for methane formation were derived and evaluated using experimental results. Experimental results show that the methane formation is increased by decreasing the catalyst particle size. The value of surface tension energy (σ) for iron catalyst is calculated in range of 0.047-0.015 J/m2in methane formation mechanism. This value is lower than iron metal and is referred to the presence of iron carbide and gas phase in this catalytic reaction. With a series of complicated mechanisms, methane is produced on the surface of catalyst and in the gas phase as well, this would be elaborated by following paragraphs, thus we can conclude that surface tension of catalyst has less effect on these reactions.

Sign in / Sign up

Export Citation Format

Share Document