Analysis and selection of optimal solvent-based technologies for biogas upgrading

Carranza-Abaíd, Andrés; Wanderley, Ricardo Ramos; Knuutila, Hanna; Jakobsen, Jana P.

doi:10.1016/j.fuel.2021.121327

Cited by 35 publications

(16 citation statements)

References 126 publications

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“…methanol, N-methyl pyrrolidone), while chemical scrubbing process (CSP) exploits the reversible reaction of solvent (e.g. mono-and diethanolamine) and the absorbed substances [15,18]. By HPWS and OPS, efficient H 2 S removal can also be managed.…”

Section: Biogas Composition and Conventional Physicochemical Upgradin...mentioning

confidence: 99%

Current Status of Biological Biogas Upgrading Technologies

Lóránt

Tardy

2022

Period. Polytech. Chem. Eng.

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To limit global warming, ratio of renewable sources in the energy mix has to be considerably raised in the following years. While application of e.g. wind and solar power usually generates fluctuations in the electric grid, biogas produced in anaerobic processes is an easy-to-store renewable energy source. Raw biogas contains generally ~55–70% methane and ~30–45% carbon-dioxide. Although raw biogas can be utilized directly for combustion or combined heat and power generation (CHP), its methane content can be raised to >95% by upgrading technologies, thus it can be valorized. By upgrading and cleaning, the quality of the upgraded biogas may reach the quality of the natural gas and it may be injected to the gas grid or used as fuel for devices optimized for natural gas. Several physico-chemical upgrading methods are available on the market (e.g. high pressure water scrubbing, pressure swing adsorption, membrane technology, etc.) to remove the carbon-dioxide content of the biogas. Opposite to the physico-chemical methods, where basically the CO2 removal is the main goal, in biological biogas upgrading technologies microorganisms are applied to convert the carbon-dioxide content of the biogas to methane (chemoautotrophic upgrading), or algal biomass (photoautotrophic upgrading). The expectations are high towards biological biogas upgrading technologies in the field of energy storage linked with carbon-dioxide capture. In this paper, latest research results concerning biological biogas upgrading are summarized, viability and competitiveness of this technology is discussed together with the most important future development directions.

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Section: Biogas Composition and Conventional Physicochemical Upgradin...mentioning

confidence: 99%

Current Status of Biological Biogas Upgrading Technologies

Lóránt

Tardy

2022

Period. Polytech. Chem. Eng.

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“…9 This significantly overshadows chemical absorption, the state-ofthe-art technology for CO 2 capture, as bio-CH 4 is delivered at low pressures requiring high bio-CH 4 -compression duty before its injection into the natural gas grid, along with excessive thermal energy demand for solvent regeneration. 10 The T h i s c o n t e n t i s preference for water-scrubbing over membranes is attributed to its lower bio-CH 4 slip (i.e., 2% vs 20%), lower operating pressure (P abs < 1.0 MPa), and the absence of feed pretreatment stages, added to protect membranes from biogas impurities (i.e., H 2 S, siloxane, NH 3 ). As mature as it may seem at this stage, water-scrubbing remains lacking in several aspects.…”

Section: Introductionmentioning

confidence: 99%

“…From a total of 606 commissioned biogas upgrading plants in IEA-Bioenergy European member countries, ∼30% employ water-scrubbing, closely followed by membrane technology (28%) . This significantly overshadows chemical absorption, the state-of-the-art technology for CO 2 capture, as bio-CH 4 is delivered at low pressures requiring high bio-CH 4 -compression duty before its injection into the natural gas grid, along with excessive thermal energy demand for solvent regeneration . The preference for water-scrubbing over membranes is attributed to its lower bio-CH 4 slip (i.e., 2% vs 20%), lower operating pressure ( P abs < 1.0 MPa), and the absence of feed pretreatment stages, added to protect membranes from biogas impurities (i.e., H 2 S, siloxane, NH 3 ).…”

Section: Introductionmentioning

confidence: 99%

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Molecular Thermodynamic Modeling of Hybrid Ionic Liquids for Biogas Upgrading

Alkhatib

Bahamón

Hajaj

et al. 2022

Ind. Eng. Chem. Res.

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This work focuses on the use of hybrid ionic liquids (ILs) solvents from mixtures of ILs with physical diluents as potential low viscosity solvents for biogas upgrading. The thermodynamic and thermal properties of hybrid solvents composed of [C 4 mim][BF 4 ] mixed with several diluents such as water, methanol, acetone, or N-Methyl-2-pyrrolidone (NMP) were quantified using polar soft-SAFT. Results revealed that all diluents contributed equally to reducing the solvents viscosity of the pure IL, however, at the expense of increased isobaric heat capacity, vaporization enthalpy, and sometimes, reduced solubility in the case of water addition. We find that acetone is good a diluent, yielding an acceptable increase in CH 4 and CO 2 solubility and with favorable decreases in viscosity and the heat of absorption among selected solvents. The collection of acquired results confirmed the reliability of polar soft-SAFT as an attractive and valuable platform toward the rational design of hybrid solvents for biogas upgrading.

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“…In order to obtain biomethane, biogas upgrading-a process of removing CO 2 -is required. Currently, six main upgrading techniques are used: water scrubbing, physical scrubbing, chemical scrubbing, pressure swing adsorption, membrane technology, and cryogenic separation, all well-analyzed by Carranza-Abid et al [6]. Further, when CO 2 is separated from biomethane, various carbon capture and storage techniques and more sustainable carbon capture and utilization techniques have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Lignocellulosic Corn Stover Biomass Pre-Treatment by Deep Eutectic Solvents (DES) for Biomethane Production Process by Bioresource Anaerobic Digestion

et al. 2021

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The valorization study of the largely available corn stover waste biomass after pretreatment with deep eutectic solvent (DES) for biomethane production in one-liter glass bioreactors by anaerobic digestion for 21 days was presented. Ammonium thiocyanate and urea deep eutectic solvent pretreatments under different conditions in terms of the components ratio and temperature were examined on corn stover waste biomass. The lignocellulose biomass was characterized in detail for its chemistry and morphology to determine the effect of the pretreatment on the natural biocomposite. Furthermore, the implications on biomethane production through anaerobic digestion with different loadings of corn stover biomass at 35 g/L and 50 g/L were tested. The results showed an increase of 48% for a cumulative biomethane production for a DES-pretreated biomass, using a solid-to-liquid ratio of 1:2 at 100 °C for 60 min, which is a strong indication that DES-pretreatment significantly enhanced biomethane production.

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Analysis and selection of optimal solvent-based technologies for biogas upgrading

Cited by 35 publications

References 126 publications

Current Status of Biological Biogas Upgrading Technologies

Current Status of Biological Biogas Upgrading Technologies

Molecular Thermodynamic Modeling of Hybrid Ionic Liquids for Biogas Upgrading

Lignocellulosic Corn Stover Biomass Pre-Treatment by Deep Eutectic Solvents (DES) for Biomethane Production Process by Bioresource Anaerobic Digestion

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