A review of recent developments in application of low cost natural materials in purification and upgrade of biogas

Mulu, Elshaday; M’Arimi, Milton M.; Ramkat, Rose C.

doi:10.1016/j.rser.2021.111081

Cited by 98 publications

(45 citation statements)

References 177 publications

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“…In practice, organic solvent regeneration requires an additional energy input of 0.1-0.15 kW-h/normal cubic metre of biogas from the solvent heating to 40-80 °C. This process can upgrade biomethane to a concentration of 93-98% (Nguyen et al 2021;Mulu et al 2021;Singhal et al 2017).…”

Section: Drawbacks Of Traditional Biogas Upgrading Methodsmentioning

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: Drawbacks Of Traditional Biogas Upgrading Methodsmentioning

confidence: 99%

“…This is a more efficient process than water scrubbing because carbon dioxide dissolves more readily in an organic solvent than in water. This process yields 93-98% biomethane (Nguyen et al 2021;Mulu et al 2021;Singhal et al 2017).…”

Section: Scrubbing Technologiesmentioning

confidence: 99%

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

et al. 2022

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“…Furthermore, one of the trends in science is the investigation of low-cost alternative adsorbents for different purposes [40], such as water cleaning from heavy metals [41,42], pharmaceuticals [43] or dyes [44]. Some applications of alternative adsorbents are targeted for gas purification, e.g., from mercury [45] and carbon dioxide capture [46], and also, eventually, for biogas purification [47,48]. Nevertheless, it is difficult to find publications on the use of waste tire pyrolysis char for gas separation.…”

Section: Introductionmentioning

confidence: 99%

Alternative Materials for the Enrichment of Biogas with Methane

et al. 2021

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Carbonaceous adsorbents have been pointed out as promising adsorbents for the recovery of methane from its mixture with carbon dioxide, including biogas. This is because of the fact that CO2 is more strongly adsorbed and also diffuses faster compared to methane in these materials. Therefore, the present study aimed to test alternative carbonaceous materials for the gas separation process with the purpose of enriching biogas in biomethane and to compare them with the commercial one. Among them was coconut shell activated carbon (AC) as the adsorbent derived from bio-waste, rubber tire pyrolysis char (RPC) as a by-product of waste utilization technology, and carbon molecular sieve (CMS) as the commercial material. The breakthrough experiments were conducted using two mixtures, a methane-rich mixture (consisting of 75% CH4 and 25% CO2) and a carbon dioxide-rich mixture (containing 25% CH4 and 75% CO2). This investigation showed that the AC sample would be a better candidate material for the CH4/CO2 separation using a fixed-bed adsorption column than the commercial CMS sample. It is worth mentioning that due to its poorly developed micropore structure, the RPC sample exhibited limited adsorption capacity for both compounds, particularly for CO2. However, it was observed that for the methane-rich mixture, it was possible to obtain an instantaneous concentration of around 93% CH4. This indicates that there is still much potential for the use of the RPC, but this raw material needs further treatment. The Yoon–Nelson model was used to predict breakthrough curves for the experimental data. The results show that the data for the AC were best fitted with this model.

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“…Biodujose metano koncentracija lemia degalų šiluminę vertę ir priklausomai nuo žaliavos bei gamybos proceso parametrų kinta nuo 45 % iki 80 % pagal tūrį. Anglies dioksido koncentracija svyruoja nuo 55 % iki 30 % pagal tūrį (Mulu et al, 2021). Biodujose taip pat galima aptikti vandenilio sulfido, vandenilio, amoniako, deguonies, anglies monoksido, azoto ir vandens garų pėdsakų (Capa et al, 2020;Khan et al, 2017).…”

Section: Biodujų Sudėtis Ir Savybėsunclassified

“…The composition of BG varies depending on the parameters of the biogas production process and feedstock, but in all cases, the two main components of biogas are CH4 and CO2. Methane content determines the lower heating value of biogas and varies from 45% to 80% by volume, depending on the raw material and process parameters (Mulu et al, 2021). Traces of hydrogen sulfide, hydrogen, ammonia, oxygen, carbon monoxide, nitrogen, and water vapor can also be detected in biogas (Capa et al, 2020;Khan et al, 2017).…”

Section: Overview Of Biogas and Hydrogen Properties And Application I...mentioning

confidence: 99%

Biodujomis veikiančio kibirkštinio uždegimo variklio ekologinių ir energinių rodiklių gerinimas

Kriaučiūnas¹

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Vadovas doc. dr. Saugirdas PUKALSKAS (Vilniaus Gedimino technikos universitetas, transporto inžinerija -T 003). Vilniaus Gedimino technikos universiteto Transporto inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkas prof. dr. Gintautas BUREIKA (Vilniaus Gedimino technikos universitetas, transporto inžinerija -T 003). Nariai: prof. dr. Stasys SLAVINSKAS (Vytauto Didžiojo universitetas, transporto inžinerija -T 003), dr. Nerijus STRIŪGAS (Lietuvos energetikos institutas, energetika ir termoinžinerija -T 006), prof. habil. dr. Stanislaw SZWAJA (Čenstakavos technologijos universitetas, Lenkija, energetika ir termoinžinerija -T 006), doc. dr. Gediminas VAIČIŪNAS (Vilniaus Gedimino technikos universitetas, transporto inžinerija -T 003). Disertacija bus ginama viešame Transporto inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2022 m. rugpjūčio 31 d. 10 val. Vilniaus Gedimino technikos universiteto senato posėdžių salėje.

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A review of recent developments in application of low cost natural materials in purification and upgrade of biogas

Cited by 98 publications

References 177 publications

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

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

Alternative Materials for the Enrichment of Biogas with Methane

Biodujomis veikiančio kibirkštinio uždegimo variklio ekologinių ir energinių rodiklių gerinimas

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