Temperature and carbon source effects on methane-air flame synthesis of CNTs

T. X. Li; K. Kuwana; K. Saito; H. Zhang; Z. Chen

doi:10.1016/j.proci.2008.06.143

Temperature and carbon source effects on methane-air flame synthesis of CNTs

T. X. Li, K. Kuwana, K. Saito, H. Zhang, Z. Chen

Research output: Contribution to journal › Conference article › peer-review

41 Scopus citations

Abstract

We have conducted experimental and numerical studies on flame synthesis of carbon nanotubes (CNTs) to investigate the effects of three key parameters - selective catalyst, temperature and available carbon sources - on CNT growth. Two different substrates were used to synthesize CNTs: Ni-alloy wire substrates to obtain curved and entangled CNTs and Si-substrates with porous anodic aluminum oxide (AAO) nanotemplates to grow well-aligned, self-assembled and size-controllable CNTs, each using two different types of laminar flames, co-flow and counter-flow methane-air diffusion flames. An appropriate temperature range in the synthesis region is essential for CNTs to grow on the substrates. Possible carbon sources for CNT growth were found to be the major species CO and those intermediate species C₂H₂, C ₂H₄, C₂H₆, and methyl radical CH₃. The major species H₂, CO₂ and H ₂O in the synthesis region are expected to activate the catalyst and help to promote catalyst reaction.

Original language	English
Pages (from-to)	1855-1861
Number of pages	7
Journal	Proceedings of the Combustion Institute
Volume	32 II
Issue number	2
DOIs	https://doi.org/10.1016/j.proci.2008.06.143
State	Published - 2009
Event	32nd International Symposium on Combustion - Montreal, QC, Canada Duration: Aug 3 2008 → Aug 8 2008

Bibliographical note

Funding Information:
This research was supported in part by the Kentucky Science and Technology Corp. (KSEF-148-502-04097), in part by the National Science Foundation (ECS 0304129), and in part by the Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171).

Keywords

Carbon nanotubes (CNTs)
Carbon sources
Flame synthesis
Temperature effect

ASJC Scopus subject areas

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

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10.1016/j.proci.2008.06.143

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title = "Temperature and carbon source effects on methane-air flame synthesis of CNTs",

abstract = "We have conducted experimental and numerical studies on flame synthesis of carbon nanotubes (CNTs) to investigate the effects of three key parameters - selective catalyst, temperature and available carbon sources - on CNT growth. Two different substrates were used to synthesize CNTs: Ni-alloy wire substrates to obtain curved and entangled CNTs and Si-substrates with porous anodic aluminum oxide (AAO) nanotemplates to grow well-aligned, self-assembled and size-controllable CNTs, each using two different types of laminar flames, co-flow and counter-flow methane-air diffusion flames. An appropriate temperature range in the synthesis region is essential for CNTs to grow on the substrates. Possible carbon sources for CNT growth were found to be the major species CO and those intermediate species C2H2, C 2H4, C2H6, and methyl radical CH3. The major species H2, CO2 and H 2O in the synthesis region are expected to activate the catalyst and help to promote catalyst reaction.",

keywords = "Carbon nanotubes (CNTs), Carbon sources, Flame synthesis, Temperature effect",

author = "Li, {T. X.} and K. Kuwana and K. Saito and H. Zhang and Z. Chen",

note = "Funding Information: This research was supported in part by the Kentucky Science and Technology Corp. (KSEF-148-502-04097), in part by the National Science Foundation (ECS 0304129), and in part by the Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171).; 32nd International Symposium on Combustion ; Conference date: 03-08-2008 Through 08-08-2008",

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doi = "10.1016/j.proci.2008.06.143",

language = "English",

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T1 - Temperature and carbon source effects on methane-air flame synthesis of CNTs

AU - Li, T. X.

AU - Kuwana, K.

AU - Saito, K.

AU - Zhang, H.

AU - Chen, Z.

N1 - Funding Information: This research was supported in part by the Kentucky Science and Technology Corp. (KSEF-148-502-04097), in part by the National Science Foundation (ECS 0304129), and in part by the Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171).

PY - 2009

Y1 - 2009

N2 - We have conducted experimental and numerical studies on flame synthesis of carbon nanotubes (CNTs) to investigate the effects of three key parameters - selective catalyst, temperature and available carbon sources - on CNT growth. Two different substrates were used to synthesize CNTs: Ni-alloy wire substrates to obtain curved and entangled CNTs and Si-substrates with porous anodic aluminum oxide (AAO) nanotemplates to grow well-aligned, self-assembled and size-controllable CNTs, each using two different types of laminar flames, co-flow and counter-flow methane-air diffusion flames. An appropriate temperature range in the synthesis region is essential for CNTs to grow on the substrates. Possible carbon sources for CNT growth were found to be the major species CO and those intermediate species C2H2, C 2H4, C2H6, and methyl radical CH3. The major species H2, CO2 and H 2O in the synthesis region are expected to activate the catalyst and help to promote catalyst reaction.

AB - We have conducted experimental and numerical studies on flame synthesis of carbon nanotubes (CNTs) to investigate the effects of three key parameters - selective catalyst, temperature and available carbon sources - on CNT growth. Two different substrates were used to synthesize CNTs: Ni-alloy wire substrates to obtain curved and entangled CNTs and Si-substrates with porous anodic aluminum oxide (AAO) nanotemplates to grow well-aligned, self-assembled and size-controllable CNTs, each using two different types of laminar flames, co-flow and counter-flow methane-air diffusion flames. An appropriate temperature range in the synthesis region is essential for CNTs to grow on the substrates. Possible carbon sources for CNT growth were found to be the major species CO and those intermediate species C2H2, C 2H4, C2H6, and methyl radical CH3. The major species H2, CO2 and H 2O in the synthesis region are expected to activate the catalyst and help to promote catalyst reaction.

KW - Carbon nanotubes (CNTs)

KW - Carbon sources

KW - Flame synthesis

KW - Temperature effect

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AN - SCOPUS:61849090234

SN - 1540-7489

VL - 32 II

SP - 1855

EP - 1861

JO - Proceedings of the Combustion Institute

JF - Proceedings of the Combustion Institute

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Y2 - 3 August 2008 through 8 August 2008

ER -

Temperature and carbon source effects on methane-air flame synthesis of CNTs

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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