Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 8, Issue 4, Pages 1016-1027Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cy02099f
Keywords
-
Categories
Funding
- SINCHEM, a Joint Doctorate program selected under the Erasmus Mundus Action 1 program [FPA 2013-0037]
- German federal and state governments to promote science and research at German universities
Ask authors/readers for more resources
It is essential for mankind to address greenhouse gas emission, depletion of fossil resources and development of efficient storage and transportation of renewable energy. By using the atmospheric gas CO2 as raw material for the value-added chain, an overall CO2 neutral circular economy is imaginable. The power to gas (PtG) concept tackles all three topics by producing methane as energy carrier using renewable hydrogen and capture of CO2. Methanation has been known for decades; however, the preparation of noble metal free catalysts possessing high activity, selectivity and stability remains challenging. Bimetallic FexNix-1 alloy catalysts have shown synergistic effects for methanation as they can be tailored to the CO dissociation energy. Multicomponent hydrotalcite precursors allow close proximity of the individual metals enabling high dispersion and continuous variation of the composition. Herein, we studied Ni-Fe/(Mg, Al)O-x bimetallic catalysts derived via mixed hydrotalcite precursors. Iron has a significant influence on both activity and selectivity due to small particle sizes, facilitated CO dissociation, and tailored surface basicity. For the best catalyst (Fe/Ni = 0.1), the CO2 conversion rate reaches about 6.96 mmol CO2 mol(Fe+Ni)(-1) s(-1) at 335 degrees C with a selectivity of 99.3% to CH4, remaining constant for at least 24 h time on stream.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available