Methanation potential: Suitable catalyst and optimized process conditions for upgrading biogas to reach gas grid requirements

Boggula, Rajeev Reddy; Fischer, D.D.; Casaretto, René; Born, Jens

doi:10.1016/j.biombioe.2019.105447

Cited by 16 publications

(8 citation statements)

References 19 publications

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“…Due to the spatial proximity of the activated species, the methanation reaction can proceed more easily at this interface. The introduction of one or more additional metals as promoters can improve both the dispersion of the active metal and the catalytic performance in general [45]. Besides the selection of the active metal, a suitable support, and optional promoters, the concentrations of the respective components play a major role [42,45].…”

Section: Catalysts For Biogas Methanationmentioning

confidence: 99%

“…The introduction of one or more additional metals as promoters can improve both the dispersion of the active metal and the catalytic performance in general [45]. Besides the selection of the active metal, a suitable support, and optional promoters, the concentrations of the respective components play a major role [42,45]. Likewise, the preparation method can influence the catalytic activity, as it affects the particle size of the active component and the metal-support interactions [42,46].…”

Section: Catalysts For Biogas Methanationmentioning

confidence: 99%

“…Supports influence the adsorption capacity and morphology of the active phase, which can increase the catalytic activity [45]. Acidic or basic sites are often provided by supports rather than the metals.…”

Section: Support Materialsmentioning

confidence: 99%

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Recent Advances in Catalysis for Methanation of CO2 from Biogas

et al. 2022

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Biogas, with its high carbon dioxide content (30–50 vol%), is an attractive feed for catalytic methanation with green hydrogen, and is suitable for establishing a closed carbon cycle with methane as energy carrier. The most important questions for direct biogas methanation are how the high methane content influences the methanation reaction and overall efficiency on one hand, and to what extent the methanation catalysts can be made more resistant to various sulfur-containing compounds in biogas on the other hand. Ni-based catalysts are the most favored for economic reasons. The interplay of active compounds, supports, and promoters is discussed regarding the potential for improving sulfur resistance. Several strategies are addressed and experimental studies are evaluated, to identify catalysts which might be suitable for these challenges. As several catalyst functionalities must be combined, materials with two active metals and binary oxide support seem to be the best approach to technically applicable solutions. The high methane content in biogas appears to have a measurable impact on equilibrium and therefore CO2 conversion. Depending on the initial CH4/CO2 ratio, this might lead to a product with higher methane content, and, after work-up, to a drop in-option for existing natural gas grids.

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Section: Catalysts For Biogas Methanationmentioning

confidence: 99%

Section: Catalysts For Biogas Methanationmentioning

confidence: 99%

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Recent Advances in Catalysis for Methanation of CO2 from Biogas

et al. 2022

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“…The wastewater was slightly alkaline in nature and higher value of BOD indicates that the wastewater is rich in degradable organic substances, which has proven its utility as a feedstock for biogas production. High load of inorganic nutrient in wastewater is due to the presence of cleaning agent (soap/detergent) in wastewater, which may cause inhibition to the growth of methanogens (Boggula et al, 2020).…”

Section: Physicochemical Properties Of Diwwmentioning

confidence: 99%

Experimental studies on co-digestion of KOH pretreated wheat straw and dairy industry wastewater for enhanced biogas production

Rani

Pathak

Bansal

2022

Preprint

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The dairy industry is one of the biggest industries in the world due to tremendous demand for milk and milk products, thereby produces huge amount of waste water as well. This wastewater contains various nutrients, high chemical oxygen demand (COD) and biological oxygen demand (BOD), in addition to organic and inorganic substances. Among the various methods of treatment of wastewater, anaerobic digestion is considered to be one of the best methods, as it contributes to energy production to resolve the energy crisis. To attain maximum production of biomethane co-digestion of substrates containing rich amount of carbohydrates and essential nutrients is beneficial. Thus, in the present experiment untreated and alkaline pretreated samples of wheat straw were co-digested with dairy wastewater. The results showed that biomethane production from slurry containing dairy wastewater co-digested with KOH pretreated wheat straw inoculated with cow dung has maximum yield (624 ml/g VS). To study the experimental data of biogas production, Gompertz model was applied and resulted that the rate of biogas production (µmmld−1) was found highest with dairy wastewater co-digested with 2% KOH pretreated wheat straw, while rate of biogas production was found lowest with untreated wheat straw.

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“…CO2 reduced under H2 gas at atmospheric pressure to form methane in the presence of metal catalysts. In order to overcome the thermodynamic of the reaction, investigation is carried out to synthesis catalysts with high methanation potential [2]. Modification of metal oxide with metal nanoparticles increases the hy-drogenation potential [3] and the surface oxygen vacancy [4].…”

Section: Introductionmentioning

confidence: 99%

Ni Nanoparticles on Reducible Metal Oxides (Sm2O3, CeO2, ZnO) as Catalysts for CO2 Methanation

Ayub

Bahruji

Mahadi

2021

Bull. Chem. React. Eng. Catal.

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The activity of reducible metal oxide Sm2O3, CeO2, and ZnO as Ni nanoparticles support was investigated for CO2 methanation reaction. CO2 methanation was carried out between 200 °C to 450 °C with the optimum catalytic activity was observed at 450 °C. The reducibility of the catalysts has been comparatively studied using H2-Temperature Reduction Temperature (TPR) method. The H2-TPR analysis also elucidated the formation of surface oxygen vacancies at temperature above 600 °C for 5Ni/Sm2O3 and 5Ni/CeO2. The Sm2O3 showed superior activity than CeO2 presumably due to the transition of the crystalline phases under reducing environment. However, the formation of NiZn alloy in 5Ni/ZnO reduced the ability of Ni to catalyze methanation reaction. A highly dispersed Ni on Sm2O3 created a large metal/support interfacial interaction to give 69% of CO2 conversion with 100% selectivity at 450 °C. The 5Ni/Sm2O3 exhibited superior catalytic performances with an apparent phase transition from cubic to a mixture of cubic and monoclinic phases over a long reaction, presumably responsible for the enhanced conversion after 10 h of reaction. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Methanation potential: Suitable catalyst and optimized process conditions for upgrading biogas to reach gas grid requirements

Cited by 16 publications

References 19 publications

Recent Advances in Catalysis for Methanation of CO2 from Biogas

Recent Advances in Catalysis for Methanation of CO2 from Biogas

Experimental studies on co-digestion of KOH pretreated wheat straw and dairy industry wastewater for enhanced biogas production

Ni Nanoparticles on Reducible Metal Oxides (Sm2O3, CeO2, ZnO) as Catalysts for CO2 Methanation

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