A novel continuous process for synthesis of carbon nanotubes using iron floating catalyst and MgO particles for CVD of methane in a fluidized bed reactor

Sarah Maghsoodi; Abasali Khodadadi; Yadollah Mortazavi

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A novel continuous process for synthesis of carbon nanotubes using iron floating catalyst and MgO particles for CVD of methane in a fluidized bed reactor

机译：在流化床反应器中使用铁浮催化剂和MgO颗粒进行甲烷CVD的新型连续碳纳米管合成方法

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A novel continuous process is used for production of carbon nanotubes (CNTs) by catalytic chemical vapor deposition (CVD) of methane on iron floating catalyst in situ deposited on MgO in a fluidized bed reactor. In the hot zone of the reactor, sublimed ferrocene vapors were contacted with MgO powder fluidized by methane feed to produce Fe/MgO catalyst in situ. An annular tube was used to enhance the ferrocene and MgO contacting efficiency. Multi-wall as well as single-wall CNTs was grown on the Fe/ MgO catalyst while falling down the reactor. The CNTs were continuously collected at the bottom of the reactor, only when MgO powder was used. The annular tube enhanced the contacting efficiency and improved both the quality and quantity of CNTs.rnThe SEM and TEM micrographs of the products reveal that the CNTs are mostly entangled bundles with diameters of about 10-20 nm. Raman spectra show that the CNTs have low amount of amorphous/defected carbon with I_G/I_D ratios as high as 10.2 for synthesis at 900 ℃. The RBM Raman peaks indicate formation of single-walled carbon nanotubes (SWNTs) of 1.0-1.2 nm diameter.

机译：一种新颖的连续工艺用于通过在流化床反应器中原位沉积在MgO上的铁浮式催化剂上甲烷的催化化学气相沉积（CVD）来生产碳纳米管（CNT）。在反应器的热区中，使升华的二茂铁蒸气与通过甲烷进料流化的MgO粉末接触以原位生产Fe / MgO催化剂。使用环形管来提高二茂铁和MgO的接触效率。多壁和单壁CNT在Fe / MgO催化剂上生长，同时从反应器中掉落。仅当使用MgO粉末时，才会在反应器底部连续收集CNT。环形管提高了接触效率，并改善了碳纳米管的质量和数量。产品的SEM和TEM显微照片显示，碳纳米管大多是纠缠在一起的束，直径约为10-20 nm。拉曼光谱表明，碳纳米管具有少量的无定形/挠曲碳，其I_G / I_D比高达10.2，可在900℃下合成。 RBM拉曼峰表明形成直径为1.0-1.2 nm的单壁碳纳米管（SWNT）。

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来源
《Applied Surface Science》 |2010年第9期|2769-2774|共6页
作者
Sarah Maghsoodi; Abasali Khodadadi; Yadollah Mortazavi;
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作者单位

Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, University of Tehran, Tehran, Iran;

Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, University of Tehran, Tehran, Iran;

Nanoelectronics Centre of Excellence, University of Tehran, POB 11365-4563, Tehran, Iran;

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正文语种 eng
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关键词
continuous process; carbon nanotubes; ferrocene; chemical vapor deposition; fluidized bed; floating catalyst;

机译：连续过程碳纳米管;二茂铁化学气相沉积;流化床浮动催化剂;

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1. Growth of single-walled carbon nanotubes on a Co—Mo—MgO supported catalyst by the CVD of methane in a fixed bed reactor: Model setting and parameter estimation [J] . Nosrat Izadi, Ali Morad Rashidi, Bahman Amini Horri Solid state sciences . 2011,第6期

机译：在固定床反应器中通过甲烷的CVD在Co-Mo-MgO负载的催化剂上单壁碳纳米管的生长：模型设置和参数估计
2. Production of single-walled carbon nanotubes from methane over Co-Mo/MgO nanocatalyst: A comparative study of fixed and fluidized bed reactors [J] . Alimorad Rashidi, Roghayeh Lotfi, Ehsaneh Fakhrmosavi, 天然气化学（英文版） . 2011,第004期

机译：在Co-Mo / MgO纳米催化剂上由甲烷生产单壁碳纳米管：固定床和流化床反应器的比较研究
3. Production of single-walled carbon nanotubes from methane over Co-Mo/MgO nanocatalyst：A comparative study of fixed and fluidized bed reactors [J] . Alimorad Rashidi, Roghayeh Lotfi, Ehsaneh Fakhrmosavi, 天然气化学杂志：英文版 . 2011,第004期

机译：Co-Mo / MgO纳米催化剂上甲烷制甲烷制备单壁碳纳米管：固定床和流化床反应器的比较研究
4. A NOVEL CARBON NANOTUBES SYNTHESIS CONTINUOUS PROCESS USING IRON FLOATING CATALYST ON MGO PARTICLES FOR CVD OF METHANE IN A FLUIDIZED BED REACTOR [C] . S. Maghsoodi, Y. Mortazavi, A. Khodadadi International Carbon Conference(Carbon 2007); 20070715-20; Seattle,WA(US) . 2007

机译：在流化床反应器中用MGO颗粒上的铁浮选催化剂进行甲烷合成的新型碳纳米管连续过程
5. Synthesis of carbon nanotubes by microwave plasma enhanced CVD on silicon using iron as catalyst. [D] . Nidadavolu, Anandha G. R. 2005

机译：以铁为催化剂，在硅上通过微波等离子体增强CVD合成碳纳米管。
6. Synthesis of Multi-Walled Carbon Nanotubes from Plastic Waste Using a Stainless-Steel CVD Reactor as Catalyst [O] . Pranav K. Tripathi, Shane Durbach, Neil J. Coville 2017

机译：不锈钢CVD反应器由塑料废料合成多壁碳纳米管
7. Catalyst nanoparticle growth dynamics and their influence on product morphology in a CVD process for continuous carbon nanotube synthesis [O] . Hoecker, C, Smail, F, Bajada, M, 2016

机译：催化剂纳米粒子生长动力学及其在连续碳纳米管合成的CVD工艺中对产物形态的影响

A novel continuous process for synthesis of carbon nanotubes using iron floating catalyst and MgO particles for CVD of methane in a fluidized bed reactor

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