Experimental investigation and energy considerations on hydrate-based biogas upgrading with CO 2  valorization

Castellani, Beatrice; Morini, Elena; Bonamente, E.; Rossi, Federico

doi:10.1016/j.biombioe.2017.07.022

Cited by 28 publications

(6 citation statements)

References 34 publications

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“…Gas uptake and normalized methane gas uptake. At time t, the moles of the methane gas consumed ((Dn H,Y ) t ) were determined by eqn (3): [42][43][44] 15024 | RSC Adv., 2019, 9, 15022-15032…”

Section: Methodsmentioning

confidence: 99%

Investigation on methane hydrate formation in silica gel particles below the freezing point

Liu

Liang

2019

RSC Adv.

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Section: Methodsmentioning

confidence: 99%

Investigation on methane hydrate formation in silica gel particles below the freezing point

Liu

Liang

2019

RSC Adv.

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“…In [5] it was assessed that PtG systems are competitive economically with conventional gas production systems when other services, such as heat and oxygen supply are provided and bring environmental benefits only when supplied with renewable sources. Castellani et al [6] studied experimentally the integration of PtG technology with hydrate-based biogas upgrading, concluding that there are benefits in terms of net energy stored, as gaseous CH 4, passing from raw biogas utilization to the integration of biogas upgrading with CO 2 methanation. The energy content improvement is 41.2%.…”

Section: Introductionmentioning

confidence: 99%

Flue gas treatment by power-to-gas integration for methane and ammonia synthesis – Energy and environmental analysis

Castellani

Rinaldi

Morini

et al. 2018

Energy Conversion and Management

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The present paper aims at assessing the carbon and energy footprint of an innovative process for carbon dioxide recycling, with flue gas as feedstock of nitrogen and carbon dioxide. Nitrogen is converted into ammonia through the Haber-Bosch process and carbon dioxide into methane via Sabatier reaction using hydrogen produced by renewable electricity excess. Carbon and energy footprint analysis of the process was assessed based on experimental data related to hydrogen production by electrolysis, methane synthesis via Sabatier reaction, energy consumption and energy output of the process units for flue gas separation, carbon dioxide methanation and ammonia synthesis. A Life Cycle Assessment method is applied, based on the experimental and computational data, both in case of renewable electricity excess and electricity from the grid. Results show that in case of renewable electricity excess, for a functional unit of 1 kg of treated flue gas, the specific carbon footprint is 0.7819 kg CO2eq and energy footprint is 50.73 MJ, which correspond to 4.012 kg and 260.3 MJ per 1 kg of produced hydrogen. In case of electricity from the grid, the specific carbon footprint is 1.550 kg CO2eq and energy footprint is 59.12 MJ per flue gas mass unit. If the carbon footprint is positive, the process indirectly leads to avoided emissions, ranging from 0.673 to 0.844 kg CO2eq kg −1 fluegas , thus proving the sustainability of the proposed pathway.

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“…The CO 2 in the hydrate phase would be disposed of in the methanation section, and it would be converted into methane. Therefore, the final volume friction would arrive at 97.24%. , …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the final volume friction would arrive at 97.24%. 31,32 The related researches have shown that, although these additives could reduce hydrate formation pressure, they also occupied big caves of hydrate cages at the same time. The storage of the hydrate was influenced, and the CO 2 separation efficiency declined greatly.…”

Section: ■ Introductionmentioning

confidence: 99%

Study of Selected Factors Influencing Carbon Dioxide Separation from Simulated Biogas by Hydrate Formation

et al. 2018

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CH 4 concentration and CO 2 separation from biogas (CH 4 /CO 2 ) by an one-stage hydrate formation was supposed to be a prospective and economical practicable technology compared with traditional gas separation methods. We investigated the influence of 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM] PF 6 ) on simulated biogas (64.0 mol %CH 4 /CO 2 ) hydrate separation in this work. The thermodynamic promoter TBAB was combined with [BMIM] PF 6 to investigate binary gas hydrate formation and separation efficiency. Different parameters which affected hydrate formation were investigated. The concentration of [BMIM] PF 6 was 1000/2000/3000 ppm, and the optimized concentration of TBAB was 4 wt %. With respect to the hydrate gas separation results, the addition of TBAB can decrease CH 4 /CO 2 hydrate formation pressure greatly and the hydrate formation induction time. CH 4 in the remaining gas can be increased from 64.0 to 79.90 mol %, and CH 4 recovery can arrive at 95.83%. Meanwhile, the addition of [BMIM] PF 6 could increase the CO 2 mole friction in hydrate from 36.0 to 58.63 mol %. So it was demonstrated that the combination of TBAB + [BMIM] PF 6 would have a great application prospect on biogas purification technology.

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Experimental investigation and energy considerations on hydrate-based biogas upgrading with CO 2 valorization

Cited by 28 publications

References 34 publications

Investigation on methane hydrate formation in silica gel particles below the freezing point

Investigation on methane hydrate formation in silica gel particles below the freezing point

Flue gas treatment by power-to-gas integration for methane and ammonia synthesis – Energy and environmental analysis

Study of Selected Factors Influencing Carbon Dioxide Separation from Simulated Biogas by Hydrate Formation

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