首页|Optimization of olefins'yield in Fischer-Tropsch synthesis using carbon nanotubes supported iron catalyst with potassium and molybdenum promoters
Optimization of olefins'yield in Fischer-Tropsch synthesis using carbon nanotubes supported iron catalyst with potassium and molybdenum promoters
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Light olefins'(C2-C4)production from syngas(H2 +CO)through Fischer-Tropsch synthesis(FTS)benefits from Fe-based catalysts supported on carbon nanotubes(CNTs).Two-level full factorial design was applied for K and/or Mo-promoted Fe/CNTs catalyst to investigate the effects of synthesis conditions including Mo/K mass ratio,ultrasonic time,and iron loading on light olefins'yield.These catalysts were characterized to perform an in-depth study of Mo/K binary promoter effects on Fe/CNTs catalyst in Fischer-Tropsch to light olefins.CO chemisorption and TEM revealed that molybdenum plays a significant role in metal dispersion,leaving structural defects on CNTs support.Additionally,H2-TPR confirmed that K as promoter facilitates reducibility of Fe/CNTs catalysts,which promoted CO conversion in FTS.Compared with the un-promoted Fe/CNTs catalysts,addition of molybdenum as a promoter increased light olefins'selectivity by 33.4%,while potassium led to an increase in CO conversion by 96.3%.The optimum formulation(0.5K5Mo10Fe/CNTs)obtained olefins'yield of 35.5%.
Carbon nanotubePotassium and molybdenum promoted ironFischer-Tropsch synthesisLight olefinsOptimizationCatalyst stability
Arash Yahyazadeh、Venu Babu Borugadda、Ajay K.Dalai
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Catalysis and Chemical Reaction Engineering Laboratories,Department of Chemical and Biological Engineering,University of Saskatchewan,Saskatoon SK S7N 5A9,Canada
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