|Table of Contents|

Effect of CO2 on the Preparation of Carbon Nanotubesby Catalytic Cracking of CH4(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年02期
Page:
66-71
Research Field:
化学工程与技术
Publishing date:

Info

Title:
Effect of CO2 on the Preparation of Carbon Nanotubesby Catalytic Cracking of CH4
Author(s):
Liu Yuying1; 2; Wang Xiaoqi1; 2; Zhai Maojing1; 2; Zhu Xiaowei1; 2; Yang Anyu1; 2; Dong Yi1; 2; Cai Bingyu1; 2; Piao Guilin1; 2; Wang Xinye1; 2
(1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China)(2.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control,Nanjing Normal University,Nanjing 210023,China)
Keywords:
biogas; methane; carbon dioxide; catalytic cracking; nickel; carbon nanotube
PACS:
TQ546
DOI:
10.3969/j.issn.1672-1292.2020.02.010
Abstract:
Biogas contains high concentrations of CH4,so it has a potential to produce carbon nanotubes. However,the high concentration of CO2 in it has a potential impact on the preparation. In this paper,we investigate the effect of CO2 on the preparation of carbon nanotubes by catalytic cracking of methane. The carbon nanotube preparation experiments are carried out by using the commercial nickel-based catalyst and the horizontal tube furnace apparatus. The catalysts and carbon nanotubes are characterized by TPR,TPO,SEM,TEM,etc. The highest catalytic cracking efficiency is obtained at 650 ℃ with the maximum mass of carbon products which are 4 times as much as that of the catalyst. The main product is multi-walled carbon nanotubes. CO2 has no effect on the best temperature for catalytic cracking,the highest efficiency of catalytic cracking and the production of multi-wall carbon nanotubes. However,CO2 increases the inner diameter,length and smoothness of the carbon nanotubes,which may be due to the deposited amorphous carbon from CH4 inhibition of catalytic cracking,that hindered the growth of carbon can nanotubes. However,the reaction of CO2 and deposited carbon removes the deposited carbon,resulting in the enhancement of the carbon nanotubes growth. From the perspective of the impact of CO2,it is feasible to prepare carbon nanotubes from biogas.

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Last Update: 2020-05-15