Supported nickel nanoparticles are promising catalysts for the methanation of CO2 . The role particle size on activity and selectivity in this reaction is a matter debate. We present study metal effects catalytic stability, selectivity, using graphitic carbon catalysts. Increasing Ni from 4 to 8 nm led higher activity, both per gram normalized surface area. However, apparent activation energy r...

Sorption-enhanced methanation (SEM) is one of the solutions proposed for production high quality synthetic natural gas (SNG) under mild conditions temperature and pressure. In this novel process, reaction performed in presence an adsorbent that retains water produced as by-product. The SEM potential a Rh-based catalyst zeolite 5A has been demonstrated both CO CO2 hydrogenation. Pure CH4 was pos...

Methanation of both CO and CO2 with electrolysis-sourced hydrogen is a key step in power-to-gas technologies nickel as the most prominent catalyst. Here, detailed, thermodynamically consistent reaction mechanism for methanation reactions over Ni-based catalysts presented. This microkinetic model based on mean-field approximation comprises 42 among 19 species. The was developed experiments from ...

In this study, a pilot-scale reactor was designed and compared using computational fluid dynamics (CFD) for high-efficiency CO2 methanation reaction. The trends of the catalyst efficiency at pilot or industrial scale could be lower than those measured laboratory scale, owing to flow characteristics. Therefore, based on results CFD analysis minimize above phenomenon. Ni–Ce–Zr used manufacture in...

Power-to-gas-to-power technologies incorporating electrolysis, methanation, SNG-fired Allam cycles and subsurface storages allow for a confined circular use of CO 2 /CH 4 thus an emission-free seasonal storage intermittent renewable energy.

Woody biomass, a renewable energy resource, accumulates solar energy in form of carbon hydrates produced from atmospheric CO2 and H2O. It is, therefore, a means of CO2 mitigation for society as long as the biogenic carbon released to the atmosphere when delivering its energy content by oxidation can be accumulated again during growth of new woody biomass. Even when considering the complete life...