Catalytic methanation of carbon dioxide captured from ambient air

Janna V. Veselovskaya, Pavel D. Parunin, Olga V. Netskina, Lidiya S. Kibis, Anton I. Lysikov and Aleksey G. Okunev

Energy, 2018, vol. 159, issue C, 766-773

Abstract: A novel process, combining direct CO2 capture from ambient air using K2CO3/Al2O3 composite sorbent and CO2 methanation in the presence of 4% Ru/Al2O3 catalyst, has been developed and tested in a cyclic mode. The thermal regeneration of the composite sorbent in these cycles has been carried out in H2 atmosphere at T = 325 °C with the gas flow going straight from the adsorber outlet to the preheated catalytic reactor. Performance of the ruthenium catalyst in CO2 methanation process has improved upon cycling, apparently due to in situ activation of the supported component. Activation of the catalyst has been studied in a gaseous mixture of CO2 and H2 (1:4) at 300 °C. The activation of the catalyst in reductive atmosphere leads to transformation of Ru4+ surface species to Ru0 particles, identified by means of X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. It has been demonstrated that it is possible to transform the desorbed carbon dioxide to methane with conversion >98% at T = 325–400 °C using the activated Ru/Al2O3 catalyst.

Keywords: Carbon dioxide; Direct air capture; Sabatier reaction; Heterogeneous catalysis; Power-to-gas (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544218312453
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:159:y:2018:i:c:p:766-773

DOI: 10.1016/j.energy.2018.06.180

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().