Renewable Energy Storage System Based on a Power-to-Gas Conversion Process

Ancona, Maria Alessandra; Antonioni, Giacomo; Branchini, L.; Pascale, Andrea De; Melino, F.; Orlandini, V.; Ferraro, M.

doi:10.1016/j.egypro.2016.11.108

Cited by 28 publications

(11 citation statements)

References 8 publications

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“…e mixture ¼ e chem þ e phys (19) The total increase in the exergy ΔE, and consequently, the total amount of energy which can be stored is the difference of product and educt-specific exergies multiplied with the mass. Table 1.…”

Section: Modelingmentioning

confidence: 99%

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Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Rudolph

Atakan

2021

Energy Tech

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The production of chemical energy carriers utilizing electrical energy from renewable sources is essential for the future energy system. A motored piston engine may be used as a reactor to convert mechanical to chemical energy by the pyrolysis of methane and ethane; this is analyzed here. The piston engine is modeled as a compression–expansion cycle with detailed chemical kinetics. The main products are hydrogen and high‐energy hydrocarbons such as acetylene, ethylene, and benzene. To reach the required high temperatures for conversion after compression, the educt is diluted with argon. The influence of the operating conditions (temperature, pressure, dilution) on the product gas composition, the stored exergy, and the ratio of exergy gain to work input (efficiency) is investigated. A conversion of >80% is predicted for an argon dilution of 93 mol% at inlet temperatures of 573 K (methane) and 473 K (ethane), respectively. A storage power of 7.5 kW (methane) and 6 kW (ethane) for a 400 ccm four‐stroke single‐cylinder is predicted with an efficiency of 75% (methane) and 70% (ethane), respectively. Conditions are identified, where high yields of the target species are achieved, and soot formation can be avoided.

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Section: Modelingmentioning

confidence: 99%

“…Although the efficiencies are similar to SMR, they are not competitive as the large‐scale plants are technically not matured. [ 19,20 ] A carbon‐dioxide‐free method to produce hydrogen with very low costs is the decomposition of methane, according to (Equation (2)).

{CH}_{4} ⇆ {normalC}_{normalS} + 2 {normalH}_{2} Δ g^{0} = 50.8 \times 10^{3} J {mol}^{- 1}

…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Rudolph

Atakan

2021

Energy Tech

View full text Add to dashboard Cite

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“…Indeed, the current European Energy Roadmap is aiming to cut the EU greenhouse gas emissions by at least 80% by 2050 [2]. In this scenario, the role of gas and P2G (i.e., the process of converting the surplus of renewable electrical energy into a gaseous fuel) can be fundamental [3]. Complementary to green power, this technology could produce green or clean gases contributing to reach the climate targets.…”

Section: Introductionmentioning

confidence: 99%

Parametric Thermo-Economic Analysis of a Power-to-Gas Energy System with Renewable Input, High Temperature Co-Electrolysis and Methanation

et al. 2022

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A complete thermo-economic analysis on a cutting-edge Power-to-Gas system that comprises innovative technologies (a Solid Oxide Electrolyte Cell co-electrolyzer and an experimental methanator) and coupled with a renewable generator is provided in this study. The conducted economic analysis (which has never been applied to this typology of system) is aimed at the estimation of the synthetic natural gas cost of a product through a cash flow analysis. Various plant configurations—with different operating temperatures and pressure levels of the key components (electrolyzer: 600–850 °C; 1–8 bar)—are compared to identify possible thermal synergies. Parametric investigations are performed, to assess both the effect of the thermodynamic arrangements and of the economic boundary conditions. Results show that the combination of a system at ambient pressure and with a thermal synergy between the co-electrolyzer and the high-temperature methanator presents the best economic performance (up to 8% lower synthetic natural gas value). The production cost of the synthetic natural gas obtained by the Power-to-Gas solutions in study (up to 80% lower than the natural gas price) could become competitive in the natural gas market, if some techno-economic driving factors (proper size ratio of the storage system and the renewable generation, electrolytic cell cost developments and introduction of a carbon tax) are considered.

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“…A promising solution in order to reduce operational related costs is remarked in the possibility of producing hydrogen from renewable energy sources (RES) [8]. Solar energy and biomass are of in great interest, showing potential also for enabling the reaction conditions, supplying the energy for heating the reactants or cooling for water vapor condensation [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Defining of criteria for flue gas decarbonization efficiency in methanation reactors with membrane technology

et al. 2021

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The paper presents an investigation on the conditions for implementing a methanation membrane decarbonator coupled to an energy installation that generates flue gases. The retention of the carbon dioxide content in the flue gases and its conversion to methane is envisaged. For start, low thermal power installations, employing natural gas as main fuel supply, are considered. Internal combustion engines (also working with natural gas fuel) are taken into account for the testing of the carbon dioxide retention process. For this, a classification of the flue gas composition by fuel categories is initially carried out. The decarbonation efficiency is defined and clarifications are made withal regarding the connection between the decarbonation installation and the energy plant. The first practical achievements are also presented, resulting from a decarbonator with a volume of 940 cm3 (having the inner diameter of 12 cm and a height of 50 cm). The results prove that the proposed solution has great potential for practical applications, further research being however necessary. In terms of operating costs (including hydrogen consumption), it is remarked that they can be reduced by exploiting the methane production and eliminating the carbon tax, extending the integration perspective form economic point of view.

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Renewable Energy Storage System Based on a Power-to-Gas Conversion Process

Cited by 28 publications

References 8 publications

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Parametric Thermo-Economic Analysis of a Power-to-Gas Energy System with Renewable Input, High Temperature Co-Electrolysis and Methanation

Defining of criteria for flue gas decarbonization efficiency in methanation reactors with membrane technology

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