Advances, challenges, and perspectives of biogas cleaning, upgrading, and utilisation

Golmakani, Ayub; Nabavi, Seyed Ali; Wadi, Basil; Manović, Vasilije

doi:10.1016/j.fuel.2021.123085

Cited by 94 publications

(34 citation statements)

References 376 publications

(447 reference statements)

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“…Table 4 Impact of biogas contaminations on biogas utilisation (Golmakani et al 2022;Muñoz et al 2015;Franco-Morgado et al 2018;Angelidaki et al 2019) Impurities in biogas, such as carbon dioxide, water vapour, hydrogen sulphide, nitrogen gas, oxygen, ammonia, and siloxanes, may present difficulties, including toxicity, corrosion, and a decrease in the heating value of generated biogas. Corrosion is frequently triggered by hydrogen sulphide.…”

Section: Discussionmentioning

confidence: 99%

“…In terms of emissions, the carbon dioxide removed from biogas during many conventional upgrading processes is frequently released into the environment, which not only emits the greenhouse gas but also wastes a valuable byproduct that could be converted into other chemicals (Golmakani et al 2022;). As a result, additional technologies to benefit biogas and biogas byproducts must be developed to ensure that no waste is released into the environment.…”

Section: Drawbacks Of Traditional Biogas Upgrading Methodsmentioning

confidence: 99%

“…Numerous countries recognise the critical role of biogas system expansion due to the sustainability transition, energy demand, and climate change mitigation. Nonetheless, global biogas production is still relatively low, with only 5% of generated biogas being used to generate biomethane, whereas complete utilisation of organic wastes for biomethane generation could meet 20% of global gas demand (Golmakani et al 2022;IEA 2020). Indeed, this sector faces several major obstacles limiting the biogas sector's ability to achieve the objectives mentioned above.…”

Section: Challenges Facing Biogas Systemsmentioning

confidence: 99%

“…The siloxanes are converted to silica during biogas ignition, which initiates abrasion of the vehicle's spark plugs, cylinder heads, and valve heads. Water vapour in biogas causes severe corrosion when water reacts with hydrogen sulphide, ammonia, and carbon dioxide, resulting in the formation of acid (Golmakani et al 2022;Muñoz et al 2015). Besides, the presence of carbon dioxide in the biogas produced is another major challenge.…”

Section: Challenges Facing Biogas Systemsmentioning

confidence: 99%

“…Methane is the bioenergy-rich element in biogas, whereas other undesirable components reduce the sophisticated biogas utilisation as follows: (1) The presence of biogas contaminants, particularly the carbon dioxide, reduces the calorific value of biogas (around 20-25 MJ/cubic metre compared to 30-35 MJ/cubic metre of the natural gas), and substantially reduces the gas cylinder's volumetric capacity, thereby allowing the generated biogas to be used for low energy utilisation applications, e.g. cooking (Golmakani et al 2022;Muñoz et al 2015;Angelidaki et al 2019).…”

Section: Biogas Upgradingmentioning

confidence: 99%

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Integration of biogas systems into a carbon zero and hydrogen economy: a review

et al. 2022

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The Ukraine conflict has put critical pressure on gas supplies and increased the price of fertilisers. As a consequence, biogas has gained remarkable attention as a local source of both gas for energy and biofertiliser for agriculture. Moreover, climate change-related damage incentivises all sectors to decarbonise and integrate sustainable practices. For instance, anaerobic digestion allows decarbonisation and optimal waste management. Incorporating a biogas system in each country would limit global warming to 2 °C. If suitable policies mechanisms are implemented, the biogas industry could reduce global greenhouse gas emissions by 3.29–4.36 gigatonnes carbon dioxide equivalent, which represent about 10–13% of global emissions. Here, we review the role of the biogas sector in capturing methane and mitigating carbon emissions associated with biogas outputs. Since biogas impurities can cause severe practical difficulties in biogas storing and gas grid delivering systems, we present upgrading technologies that remove or consume the carbon dioxide in raw biogas, to achieve a minimum of 95% methane content. We discuss the role of hydrogen-assisted biological biogas upgrading in carbon sequestration by converting carbon dioxide to biomethane via utilising hydrogen generated primarily through other renewable energy sources such as water electrolysis and photovoltaic solar facilities or wind turbines. This conceptual shift of 'power to gas' allows storing and utilising the excess of energy generated in grids. By converting carbon dioxide produced during anaerobic digestion into additional biomethane, biogas has the potential to meet 53% of the demand for fossil natural gas. We also evaluate the role of digestate from biogas systems in producing biochar, which can be used directly as a biofertiliser or indirectly as a biomethanation enhancement, upgrading, and cleaning material.

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Section: Discussionmentioning

confidence: 99%

Section: Drawbacks Of Traditional Biogas Upgrading Methodsmentioning

confidence: 99%

Section: Challenges Facing Biogas Systemsmentioning

confidence: 99%

Section: Challenges Facing Biogas Systemsmentioning

confidence: 99%

Section: Biogas Upgradingmentioning

confidence: 99%

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