Small scale bio-LNG plant: Comparison of different biogas upgrading techniques

Baccioli, Andrea; Antonelli, Marco; Frigo, Stefano; Desideri, Umberto; Pasini, Gianluca

doi:10.1016/j.apenergy.2018.02.149

Cited by 102 publications

(35 citation statements)

References 26 publications

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“…However, many countries are now using governmental subsides to promote the production of biomethane to be injected in the natural gas grid and eventually be used as a fuel for the transportation sector [19]. Biomethane produced from biogas upgrading is an attractive biofuel as it is mostly made up of methane (more than 97%) [20,21]. The adoption of biomethane does not require any conversion of traditional natural gas-fueled engines and can be easily stored on board as compressed gas [22] or in a liquid state after a liquefaction process [23,24].…”

Section: Introductionmentioning

confidence: 99%

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

et al. 2020

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Biogas is a fuel obtained from organic waste fermentation and can be an interesting solution for producing electric energy, heat and fuel. Recently, many European countries have incentivized the production of biomethane to be injected into natural gas grids or compressed and used as biofuel in vehicles. The introduction of an upgrading unit into an existing anaerobic digestion plant to convert biogas to biomethane may have a strong impact on the overall energy balance of the systems. The amount of biomethane produced may be optimized from several points of view (i.e., energy, environmental and economic). In this paper, the mass and energy fluxes of an anaerobic digestion plant were analyzed as a function of the biogas percentage sent to the upgrading system and the amount of biomethane produced. A numerical model of an anaerobic digestion plant was developed by considering an existing case study. The mass and energy balance of the digesters, cogeneration unit, upgrading system and auxiliary boiler were estimated when the amount of produced biomethane was varied. An internal combustion engine was adopted as the cogeneration unit and a CO 2 absorption system was assumed for biogas upgrading. Results demonstrated that the energy balance of the plant is strictly dependent on the biomethane production and that an excess of biomethane production makes the plant totally dependent on external energy sources. As for the environmental impact, an optimal level of biomethane production exists that minimizes the emissions of equivalent CO 2 . However, high biomethane subsides can encourage plant managers to increase biomethane production and thus reduce CO 2 savings.

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Section: Introductionmentioning

confidence: 99%

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

et al. 2020

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“…Also, different physical models, "Refprop" alongside with Peng-Robinson, were used. The liquefaction process presented in [21] In Figure 5a, it can be observed that the NPVs have the form of a quadratic function of the discount rate. As mentioned above, the industry's discount rate is around 10%.…”

Section: Discussionmentioning

confidence: 99%

“…The authors used the same physical model as Peng-Robinson. In the paper [21], a small bio-LNG plant was designed. The removal of CO 2 was also discussed there.…”

Section: Discussionmentioning

confidence: 99%

“…Natural gas obtained this way is cheaper and produces a sustainable and competitive alternative to conventional fuels, alongside with an improvement of the environment and contribution to fulfilling the EU demands of lowering CO 2 emissions [19]. Small-scale LNG could be a better alternative to large-scale factories [20,21]. This kind of decentralization of LNG plants and use of biogas produced locally brings many benefits to the region itself, as well as to the entire European Union [20].…”

Section: Introductionmentioning

confidence: 99%

“…This kind of decentralization of LNG plants and use of biogas produced locally brings many benefits to the region itself, as well as to the entire European Union [20]. Local LNG plants were also discussed in other scientific papers [21][22][23][24]. Authors agree that the usage of local sources is an integral part of LNG plant sustainability.…”

Section: Introductionmentioning

confidence: 99%

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Economic and Technological Analysis of Commercial LNG Production in the EU

et al. 2019

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There is a global need to increase the production of alternative sources of energy due to many issues related to conventional sources, such as environmental degradation or energy security. In this paper, decentralized liquefied natural gas production is analyzed. Liquefied natural gas, according to the analysis, can be considered a viable alternative even for decentralized applications Design and economic analysis of a small-scale biogas LNG plan together with the necessary technology and economic evaluation are presented in the paper. The results show that a project of the proposed size (EUR 3 million) offers a relatively good profitability level. Specifically, the net present value of the project is mostly positive (around EUR 0.1 million up to EUR 0.8 million). Therefore, based on the research, small LNG plants operating across the continent can be recommended for the processing of local sources of biogas.

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Ionic Liquid Assessment as Suitable Solvent for Biogas Upgrading Technology Based on the Process System Engineering Perspective

2021

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Biogas requires specific processing in terms of upgradation to remove acid gas contents, making it a profitable fuel with higher energy content. This is conventionally attained through physical or chemical absorption due to the higher selectivity towards CO2 and H2S. The conventional processing technology impacts the process with higher energy content for solvent regeneration, solvent loss causing a threat to the environment with its toxicity, and damaging the equipment by corrosion. In this view, ionic liquids (ILs) emerged as potential candidates providing a favorable facet in terms of both processing and ecological aspects. Hence, herein the potential of IL and deep eutectic solvent (DES) in comparison to the conventional solvents and technologies used for biogas upgrading based on process system engineering perspective that showcases techno‐economic, energy‐economic, and environmental aspects and opportunities that may lead towards establishing sustainable and effective processing of biogas is shown and a comprehensive review on the opportunities, prospects, and challenges to make IL and DES as future solvent for biogas upgrading on the commercial scale is provided.

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Small scale bio-LNG plant: Comparison of different biogas upgrading techniques

Cited by 102 publications

References 26 publications

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

Economic and Technological Analysis of Commercial LNG Production in the EU

Ionic Liquid Assessment as Suitable Solvent for Biogas Upgrading Technology Based on the Process System Engineering Perspective

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