Kinetic model of carbon nanotube production from carbon dioxide in a floating catalytic chemical vapour deposition reactor

摘要: The production of carbon nanostructures, including nanotubes (CNTs), by chemical vapour deposition (CVD) occurs thermally induced decomposition carbon-containing precursors. the feedstock leading to intermediate reaction products is an important step, but rarely incorporated in rate equations, since it generally assumed that diffusion through or over catalyst nanoparticles rate-limiting step CNTs. Furthermore, there no kinetic model date for CNTs from dioxide. These aspects are addressed this study with aid a series experiments conducted floating catalytic CVD reactor which effects temperature, concentration and flow CO2 were investigated. A simple equation reductive adsorption onto surface followed proposed as follows: d[CNT]/dt = K[CO2], where K proportional coefficient carbon. derived used calculate amount given CO2, experimentally measured data fits very well at low dioxide concentration.