Study on a numerical model and PSA (pressure swing adsorption) process experiment for CH4/CO2 separation from biogas

Kim, Young Jun; Nam, Young Suk; Kang, Yong Tae

doi:10.1016/j.energy.2015.08.086

Cited by 84 publications

(28 citation statements)

References 26 publications

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“…CO 2 content in biogas as produced in anaerobic digestion varies between 35%-45% [16,17]. To remove CO 2 , very diverse techniques have been studied: Pressure Swing Adsorption (PSA) [18,19], Water Scrubbing (WS) [20,21], Organic Physical Scrubbing (OPS) [22,23], Chemical Absorption Scrubbing (CAS) [13,24], Membrane Separation (MS) [25,26] and Cryogenic Separation (CS) [27,28]. CAS is one of the most promising technique [29,30], both with amines (monoethanolamine (MEA) or Piperazine (PZ)) and caustic solvents (NaOH or potassium hydroxide (KOH)).…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Sodium Hydroxide from a Biogas Upgrading Unit through the Synthesis of Precipitated Calcium Carbonate: An Experimental Influence Study of Reaction Parameters

Baena‐Moreno¹,

Rodríguez‐Galán²,

Vega³

et al. 2018

Processes

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This article presents a regeneration method of a sodium hydroxide (NaOH) solution from a biogas upgrading unit through calcium carbonate (CaCO3) precipitation as a valuable by-product, as an alternative to the elevated energy consumption employed via the physical regeneration process. The purpose of this work was to study the main parameters that may affect NaOH regeneration using an aqueous sodium carbonate (Na2CO3) solution and calcium hydroxide (Ca(OH)2) as reactive agent for regeneration and carbonate slurry production, in order to outperform the regeneration efficiencies reported in earlier works. Moreover, Raman spectroscopy and Scanning Electron Microscopy (SEM) were employed to characterize the solid obtained. The studied parameters were reaction time, reaction temperature, and molar ratio between Ca(OH)2 and Na2CO3. In addition, the influence of small quantities of NaOH at the beginning of the precipitation process was studied. The results indicate that regeneration efficiencies between 53%–97% can be obtained varying the main parameters mentioned above, and also both Raman spectroscopy and SEM images reveal the formation of a carbonate phase in the obtained solid. These results confirmed the technical feasibility of this biogas upgrading process through CaCO3 production.

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Section: Introductionmentioning

confidence: 99%

Regeneration of Sodium Hydroxide from a Biogas Upgrading Unit through the Synthesis of Precipitated Calcium Carbonate: An Experimental Influence Study of Reaction Parameters

Baena‐Moreno¹,

Rodríguez‐Galán²,

Vega³

et al. 2018

Processes

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“…The pressure and purge gas ratio helps in the adsorption and plays an important role to improve the purity of biogas. A stepwise PSA process helps to recover pure methane from a mixture of CH 4 and CO 2 [11]. Zeolites are such materials which don't harm environment and hence are of utmost important for biogas purification.…”

Section: A Brief Literature Reviewmentioning

confidence: 99%

A Retrospection on Current Trends in Biogas Purification

Patil*¹,

Barjibhe²,

Chopade³

et al. 2019

IJITEE

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As the non-renewable resources are depleting at a lighting speed there will be crisis for requirement of energy in near future. The only alternative is to go for renewable resources. It has been proven that biogas and gasoline can be used with association to reduce the energy demand. As even though electric vehicles are booming in the market, it will take more than a decade to move towards electric world, especially in India. The reason behind that is, the raw material required to make batteries is not at all available with India, so the only option is to export, which imposes additional cost on the country's financial books. And also the tendency of common Indian pupils to shift from IC engine to electric vehicles will incur a high debt. So to reduce the dependency on electric vehicle and also to reduce cost, biogas in the form of compressed natural gas is the only way to come in near future. The motivation of this review work is to produce biogas from food wastes, to purify and store in cylinder used to run vehicles and to analyze the effect of performance and emission characteristics of an engine

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“…Adsorption is considered an attractive technology for gas separation processes due to its relatively lower energy requirement and higher performance. Pressure swing adsorption (PSA) and temperature swing adsorption (TSA) cycles are well‐known technologies widely applied to separate or purify gas mixtures , . Among the adsorbents used in PSA and TSA processes, activated carbon is one of the most employed and commercialized adsorbent for gas separation due to its favorable textural properties .…”

Section: Introductionmentioning

confidence: 99%

Simple Procedure to Estimate Mass Transfer Coefficients from Uptake Curves on Activated Carbons

et al. 2018

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A method based on the linear driving force (LDF) approximation is described to estimate the mass transfer coefficient of molecules adsorbing onto microporous carbons, by using independently measured uptake data. This parameter was determined from uptake curves derived from pressure increments during the measurement of isotherm data. To validate the method, simulations for batch uptake were performed and compared to the experimental data in order to obtain the values for the LDF constants. Such values were applied to predict breakthrough curves and compared to experimental data. The proposed method to estimate the LDF coefficient can be adequate to obtain a more physically meaningful value of the mass transfer coefficient.

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Study on a numerical model and PSA (pressure swing adsorption) process experiment for CH4/CO2 separation from biogas

Cited by 84 publications

References 26 publications

Regeneration of Sodium Hydroxide from a Biogas Upgrading Unit through the Synthesis of Precipitated Calcium Carbonate: An Experimental Influence Study of Reaction Parameters

Regeneration of Sodium Hydroxide from a Biogas Upgrading Unit through the Synthesis of Precipitated Calcium Carbonate: An Experimental Influence Study of Reaction Parameters

A Retrospection on Current Trends in Biogas Purification

Simple Procedure to Estimate Mass Transfer Coefficients from Uptake Curves on Activated Carbons

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