A time-dependent multiphysics, multiphase modeling framework for carbon nanotube synthesis using chemical vapor deposition

Authors

  • Mahmoud Reza Hosseini,

    1. Smart Structures and Nanoelectromechanical Systems Laboratory, Dept. of Mechanical Engineering, Clemson University, Clemson, SC 29634
    Search for more papers by this author
  • Nader Jalili,

    Corresponding author
    1. Smart Structures and Nanoelectromechanical Systems Laboratory, Dept. of Mechanical Engineering, Clemson University, Clemson, SC 29634
    • Smart Structures and Nanoelectromechanical Systems Laboratory, Dept. of Mechanical Engineering, Clemson University, Clemson, SC 29634
    Search for more papers by this author
  • David A. Bruce

    1. Dept. of Chemical and Biomolecular Engineering, Clemson University, Clemson, SC 29634
    Search for more papers by this author

Abstract

A time-dependent multiphysics, multiphase model is proposed and fully developed here to describe carbon nanotubes (CNTs) fabrication using chemical vapor deposition (CVD). The fully integrated model accounts for chemical reaction as well as fluid, heat, and mass transport phenomena. The feed components for the CVD process are methane (CH4), as the primary carbon source, and hydrogen (H2). Numerous simulations are performed for a wide range of fabrication temperatures (973.15–1273.15 K) as well as different CH4 (500–1000 sccm) and H2 (250–750 sccm) flow rates. The effect of temperature, total flow rate, and feed mixture ratio on CNTs growth rate as well as the effect of amorphous carbon formation on the final product are calculated and compared with experimental results. The outcomes from this study provide a fundamental understanding and basis for the design of an efficient CNT fabrication process that is capable of producing a high yield of CNTs, with a minimum amount of amorphous carbon. © 2009 American Institute of Chemical Engineers AIChE J, 2009

Ancillary