Open AccessHighly Active Ce- and Mg-Promoted Ni Catalysts Supported on Cellulose-Derived Carbon for Low-Temperature CO2 Methanation
Author(s) -
P. Tarifa,
Cristina MegíasSayago,
F. Cazaña,
Miguel González-Martín,
N. Latorre,
E. Romeo,
Juan J. Delgado,
A. Μοnzόn
Publication year - 2021
Publication title -
energy and fuels
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.861
H-Index - 186
eISSN - 1520-5029
pISSN - 0887-0624
DOI - 10.1021/acs.energyfuels.1c01682
Subject(s) - methanation , catalysis , selectivity , methane , chemistry , yield (engineering) , metal , carbon fibers , inorganic chemistry , atmospheric temperature range , mineralization (soil science) , chemical engineering , materials science , metallurgy , organic chemistry , composite number , nitrogen , physics , meteorology , engineering , composite material
The CO 2 methanation performance of Mg- and/or Ce-promoted Ni catalysts supported on cellulose-derived carbon (CDC) was investigated. The samples, prepared by biomorphic mineralization techniques, exhibit pore distributions correlated to the particle sizes, revealing a direct effect of the metal content in the textural properties of the samples. The catalytic performance, evaluated as CO 2 conversion and CH 4 selectivity, reveals that Ce is a better promoter than Mg, reaching higher conversion values in all of the studied temperature range (150-500 °C). In the interval of 350-400 °C, Ni-Mg-Ce/CDC attains the maximum yield to methane, 80%, reaching near 100% CH 4 selectivity. Ce-promoted catalysts were highly active at low temperatures (175 °C), achieving 54% CO 2 conversion with near 100% CH 4 selectivity. Furthermore, the large potential stability of the Ni-Mg-Ce/CDC catalyst during consecutive cycles of reaction opens a promising route for the optimization of the Sabatier process using this type of catalyst.