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Experimental Investigation on CO 2 Methanation Process for Solar Energy Storage Compared to CO 2-Based Methanol Synthesis
| Content Provider | Semantic Scholar |
|---|---|
| Author | Castellani, Beatrice Gambelli, Alberto Maria Morini, Elena Nastasi, Benedetto Presciutti, Andrea Filipponi, Mirko Nicolini, Andrea Rossi, Federico |
| Copyright Year | 2017 |
| Abstract | The utilization of the captured CO2 as a carbon source for the production of energy storage media offers a technological solution for overcoming crucial issues in current energy systems. Solar energy production generally does not match with energy demand because of its intermittent and non-programmable nature, entailing the adoption of storage technologies. Hydrogen constitutes a chemical storage for renewable electricity if it is produced by water electrolysis and is also the key reactant for CO2 methanation (Sabatier reaction). The utilization of CO2 as a feedstock for producing methane contributes to alleviate global climate changes and sequestration related problems. The produced methane is a carbon neutral gas that fits into existing infrastructure and allows issues related to the aforementioned intermittency and non-programmability of solar energy to be overcome. In this paper, an experimental apparatus, composed of an electrolyzer and a tubular fixed bed reactor, is built and used to produce methane via Sabatier reaction. The objective of the experimental campaign is the evaluation of the process performance and a comparison with other CO2 valorization paths such as methanol production. The investigated pressure range was 2–20 bar, obtaining a methane volume fraction in outlet gaseous mixture of 64.75% at 8 bar and 97.24% at 20 bar, with conversion efficiencies of, respectively, 84.64% and 99.06%. The methanol and methane processes were compared on the basis of an energy parameter defined as the spent energy/stored energy. It is higher for the methanol process (0.45), with respect to the methane production process (0.41–0.43), which has a higher energy storage capability. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.mdpi.com/1996-1073/10/7/855/pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Carbon Dioxide Carbon dioxide:PPres:Pt:BldC:Qn:Transcutaneous CO2 monitor Dual-Energy X-Ray Absorptiometry Efficiency Electrolysis FITS Hydrogen Methanol Microscopy, Energy-Filtering Transmission Electron Neutral monism Population Parameter Reactor (software) Reactor Device Component Storage Medium Volume fraction methanol-CoM methyltransferase complex |
| Content Type | Text |
| Resource Type | Article |
