Carbon nanotubes shynthesis in fluidized bed reactor equipped with a cyclone

Quality in Research: International Symposium on Materials, Metallurgy, and Chemical Engineering

材料科学;冶金学;化学工业

Setyopratomo, P.^1 ; Sudibandriyo, M.^1 ; Wulan, P.P.D.K.^1

Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok

16424, Indonesia^1

关键词: Carbon efficiency;    Fluidized bed reactors;    Inner diameters;    Mass percentage;    Metal components;    Reaction temperature;    Total pore volume;    Volumetric flow rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/316/1/012009/pdf
DOI  :  10.1088/1757-899X/316/1/012009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This work aimed to observe the performance of a fluidized bed reactor which was equipped with a cyclone in the synthesis of carbon nanotubes (CNT) by chemical vapor deposition. Liquefied petroleum gas with a constant volumetric flow rate of 1940 cm3/minutes was fed to the reactor as a carbon source, while a combination of metal components of Fe-Co-Mo supported on MgO was used as catalyst. The CNT synthesis was carried out at a reaction temperature which was maintained at around 800 - 850 °C for 1 hour. The CNT yield was decreased sharply when the catalyst feed was increased. The carbon efficiency is directly proportional to the mass of catalyst fed. It was found from the experiment that the mass of as-grown CNT increased in proportion to the increase of the catalyst mass fed. A sharp increase of the mass percentage of carbon nanotubes entrainment happened when the catalyst feed was raised from 3 to 7 grams. Agglomerates of carbon nanotubes have been formed. The agglomerates composed of mutually entangled carbon nanotubes which have an outer diameter range 8 - 14 nm and an inner diameter range 4 - 10 nm, which confirmed that the multi-walled carbon nanotubes were formed in this synthesis. It was found that the mesopores dominate the pore structure of the CNT product and contribute more than 90 % of the total pore volume.