Carbon Dioxide Methanation Over Nickel Catalysts Supported on Activated Carbon at Low Temperature

Author(s)
Cam, Le Minh
Thi Thu Ha, Nguyen
Khu, Le Van
Ha, Nguyen Ngoc
Brown, Trevor C
Publication Date
2019-11-20
Abstract
The methanation of carbon over nickel catalysts supported on activated carbon was investigated using a continuous flow microreactor. Catalysts with nickel loadings of 5, 7, and 10% were synthesised by incipient wetness impregnation methods and characterised using Brunauer–Emmett–Teller (BET), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), H₂-temperature-programmed reduction (TPR), BET, XRD, SEM, TEM and H₂-TPR. The methanation reaction was studied over the temperature range 200–500°C with a H₂ to CO₂ ratio of 4 : 1 in He and at 1 atm. With an increase in Ni content from 5 to 7 % both conversion of CO₂ and CH₄ selectivity increased. Increasing the nickel content to 10 %, however decreased conversion and selectivity due to the larger crystallite size and lower surface area of the catalyst. The most active catalyst with 7 % Ni does not deactivate during 15 h time on stream at 350°C. The high catalytic activity and stability of the studied catalysts is a consequence of the reducibility of Ni and a synergetic effect between the nickel active sites and the activated carbon surface.
Citation
Australian Journal of Chemistry, 72(12), p. 969-977
ISSN
1445-0038
0004-9425
Link
Publisher
CSIRO Publishing
Rights
CC0 1.0 Universal
Title
Carbon Dioxide Methanation Over Nickel Catalysts Supported on Activated Carbon at Low Temperature
Type of document
Journal Article
Entity Type
Publication

Files:

NameSizeformatDescriptionLink