Layered Vacuum Pressure-Swing Adsorption for Biogas Upgrading

Grande, Carlos A.; Rodrigues, Alı́rio E.

doi:10.1021/ie070942d

Cited by 58 publications

(46 citation statements)

References 11 publications

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“…This approach has also been applied in other separations [66,70,79,[154][155][156][157][158][159][160]. Consecutive layers of adsorbents can also be used to improve the productivity of kinetic adsorbents by adding a material that can be easily regenerated after the kinetic adsorbent [161,162].…”

Section: The Role Of the Adsorbent In Psamentioning

confidence: 99%

Advances in Pressure Swing Adsorption for Gas Separation

Grande

2012

ISRN Chemical Engineering

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186

108

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Pressure swing adsorption (PSA) is a well-established gas separation technique in air separation, gas drying, and hydrogen purification separation. Recently, PSA technology has been applied in other areas like methane purification from natural and biogas and has a tremendous potential to expand its utilization. It is known that the adsorbent material employed in a PSA process is extremely important in defining its properties, but it has also been demonstrated that process engineering can improve the performance of PSA units significantly. This paper aims to provide an overview of the fundamentals of PSA process while focusing specifically on different innovative engineering approaches that contributed to continuous improvement of PSA performance.

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Section: The Role Of the Adsorbent In Psamentioning

confidence: 99%

Advances in Pressure Swing Adsorption for Gas Separation

Grande

2012

ISRN Chemical Engineering

Self Cite

186

108

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“…Amine scrubbing is the most economical upgrading process, but only for high flowrates. VPSA seems to be a suitable process for locations with small and medium flowrates and with mild temperatures [5].…”

Section: Introductionmentioning

confidence: 99%

Response surface methodology as an efficient tool for optimizing carbon adsorbents for CO2 capture

Gil

Martinez

García

et al. 2013

Fuel Processing Technology

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Phenol-formaldehyde resins and a low-cost biomass residue, olive stones (OS), were used to prepare five activated carbons for CO 2 separation at atmospheric pressure, i.e., in post-combustion processes or from biogas and bio-hydrogen streams. Two phenolformaldehyde resins were synthesized: Resol, obtained by using alkaline environment, and Novolac, synthesized in the presence of an acid catalyst. Carbon precursors were prepared by mixing both resins with KCl or by mixing the Novolac resin with OS. The precursors were carbonized under an inert atmosphere of N 2 at different temperatures.The last stage in the synthesis of the adsorbents involved physical activation with carbon dioxide, which was carried out at different temperatures and burn-off degrees.Response surface methodology (RSM) is proposed as a tool for rapidly optimizing the activation parameters in order to obtain the highest possible CO 2 capture capacity of activated carbons. The optimum values of activation temperature and burn-off degree that maximize CO 2 uptake by the activated carbons at 35 ºC and atmospheric pressure were obtained within the experimental region. A value of CO 2 adsorption capacity of 9.3 wt.% was achieved. Activated carbons derived from Novolac phenol-formaldehyde * Corresponding author. Tel.: +34 985 119 090; Fax: +34 985 297 662 E-mail address: cpevida@incar.csic.es (C. Pevida) 2 resin type and from OS showed great potential as adsorbents for CO 2 capture at atmospheric pressure.

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“…For smaller size plants, pressure swing adsorption (PSA) technologies using solid adsorbents are proposed [25]. Vacuum pressure-swing adsorption (VPSA) also seems to be a suitable process for locations with small to medium flow rates under mild temperatures [26].…”

Section: Introductionmentioning

confidence: 99%

Carbon adsorbents for CO2 capture from bio-hydrogen and biogas streams: Breakthrough adsorption study

Gil

Álvarez-Gutiérrez

Martinez

et al. 2015

Chemical Engineering Journal

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The biological production of H 2 by dark fermentation is being extensively investigated due to the great potential of the two-phase hydrogen/methane fermentation process for recovering energy from carbohydrate-rich wastes. However, the purification of the bio-hydrogen and biogas obtained is needed to produce high-purity H 2 and CH 4 streams appropriate for industrial application. In this study, the performance of three activated carbons (No1KCla-600, No1KClb-1000 and No2OS-1000), synthesized from phenol-formaldehyde resins, as potential adsorbents for CO 2 capture from bio-hydrogen and biogas streams has been evaluated under dynamic conditions. Adsorptiondesorption cycles by means of temperature swings were conducted at ambient temperature and atmospheric pressure with CO 2 /H 2 (40/60 and 70/30 vol.% at normal conditions) and CO 2 /CH 4 (50/50 vol.% at normal conditions) binary gas mixtures in a purpose-built fixed-bed set-up. The performance of the resin-derived carbons to separate CO 2 was superior to that of reference commercial carbons in terms of CO 2 uptake, breakthrough time and column efficiency. These adsorbents presented high * Corresponding author.

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Layered Vacuum Pressure-Swing Adsorption for Biogas Upgrading

Cited by 58 publications

References 11 publications

Advances in Pressure Swing Adsorption for Gas Separation

Advances in Pressure Swing Adsorption for Gas Separation

Response surface methodology as an efficient tool for optimizing carbon adsorbents for CO2 capture

Carbon adsorbents for CO2 capture from bio-hydrogen and biogas streams: Breakthrough adsorption study

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