Kinetics of Carbon Nanotube Aerogel Synthesis using Floating Catalyst Chemical Vapor Deposition

Kinetics of formation of carbon nanotube aerogel (CNT-a) by floating catalyst chemical vapor deposition (FC–CVD) has been studied for the first time by thermocatalytic decomposition of ethanol using ferrocene and thiophene as the catalyst and promoter, respectively. Effects of temperature (1423–1573...

Full description

Saved in:
Bibliographic Details
Published in:Industrial & engineering chemistry research 2021-02, Vol.60 (5), p.2187-2196
Main Authors: Yadav, Manishkumar D, Dasgupta, Kinshuk
Format: Article
Language:English
Subjects:
Materials and Interfaces
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Kinetics of formation of carbon nanotube aerogel (CNT-a) by floating catalyst chemical vapor deposition (FC–CVD) has been studied for the first time by thermocatalytic decomposition of ethanol using ferrocene and thiophene as the catalyst and promoter, respectively. Effects of temperature (1423–1573 K), catalyst concentration (1.2–6.5 Pa), and partial pressure of ethanol (120–300 kPa) on the rate of formation of CNT-a have been investigated. The activation energy for the formation of CNT-a was calculated to be 38.5 kJ mol–1. Various kinetic models were used to determine the rate limiting step(s). Irreversible dissociation of adsorbed ethanol followed by decomposition of the adsorbed ethyl group was found to be rate controlling step for the formation of CNT-a. The atomic ratios of Fe/S and Fe/C were found to have profound effects on the type of CNTs present in CNT-a as characterized by the scanning electron microscopy and Raman spectroscopy.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.0c05742