Vacuum pressure swing adsorption process with carbon molecular sieve for CO2 separation from biogas

Shen, Yuanhui; Niu, Zhaoyang; Zhang, RunYe; Zhang, Donghui

doi:10.1016/j.jcou.2021.101764

Cited by 24 publications

(8 citation statements)

References 55 publications

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“…Another adsorbent namely carbon molecular sieve has been studied in vacuum pressure swing adsorption where the micropore size of the molecular sieve was in the rage of 0.25-0.6 nm. Raw biogas containing ~50% methane when passed through it, upgrades biogas with 98% pure Bio-CH 4 gas [54] by silica gel employed as an adsorbent [55]. Absorbents with significant absorption potentials, enhanced selectivity, and presumably high thermal resistance may be likely to be used for improved separation efficiency as well as a greater level of process integration.…”

Section: Pressure Swing Methods Of Adsorptionmentioning

confidence: 99%

Recent Development in Physical, Chemical, Biological and Hybrid Biogas Upgradation Techniques

et al. 2022

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Energy driven technologies and enhanced per-capita waste production have led to the establishment of novel technologies to simultaneously produce fuels as well as treat the wastes. Anaerobic digestion is cost-effective and sustainable process to produce biogas. Biogas is a mixture of CO2, CH4, H2S, is an eco-friendly and inexpensive renewable biofuel. This mixture of gases restricts biogas utilization in vehicular fuel, CHPs, therefore, biogas upgradation becomes a necessary step. Conventional upgradation technologies for example water scrubbing, physical adsorption, chemical adsorption, amine scrubbing, etc. are cost intensive and require high maintenance. Novel technologies like biological methods of biogas upgradation are being investigated and new improvements are made in the conventional methods. This review aims to give a close insight about various technologies of upgradation including, pressure swing, amine scrubbing, membrane separation, cryogenic separation, biological methods, etc., along with the major challenges and limitations. The study also intends to provide an overview about the future perspective and scope of these technologies.

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Section: Pressure Swing Methods Of Adsorptionmentioning

confidence: 99%

Recent Development in Physical, Chemical, Biological and Hybrid Biogas Upgradation Techniques

et al. 2022

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“…In response to this problem, China has introduced policies to achieve carbon peak by 2030 and carbon neutrality by 2060 [2] . At present, the main gas separation technologies in use are amine‐scrubbing, [3] pressure swing adsorption (PSA), [4] vacuum swing adsorption (VSA), [5] temperature swing adsorption (TSA), [6] membrane separation techniques, [7] whereby the amine‐scrubbing is the most widely used. However, aqueous amine solutions are corrosive and volatile, and the thermal desorption requires high energy consumption (60–70 kJ mol −1 ) [3b] .…”

Section: Introductionmentioning

confidence: 99%

Supercapacitive Swing Adsorption of Carbon Dioxide: Current Status and Perspectives

Wang,

Zhang,

Feng

et al. 2023

Batteries & Supercaps

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Supercapacitive swing adsorption (SSA) is a newly discovered electrochemically driven carbon dioxide capture method using the principle of electric double‐layer capacitor, which achieves the purpose of adsorption and desorption of CO2 by charging and discharging the supercapacitive electrodes. Based on this method, gas separation devices were designed which could adsorb CO2 from a mixture of carbon dioxide and nitrogen, and a series of factors affecting the CO2 adsorption capacity were explored. This review briefly introduces the SSA mechanism and the structural design of SSA modules, and analyzes the factors influencing the performance of SSA from multiple aspects, with emphasis on electrode materials, in order to find ways to improve the CO2 adsorption capacity of SSA modules.

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“…Similar cycle schedules have been used in the literature for this binary separation. [35][36][37]39,41 The LDF and KLLDF models, in conjunction with the dual process Langmuir (DPL) model for mixed gas adsorption equilibrium predictions, were executed in the dynamic adsorption process simulator (DAPS). The required LDF mass transfer coefficients were measured independently of the PSA experiments with the same coefficients used in both the LDF and KLLDF models.…”

Section: ■ Introductionmentioning

confidence: 99%

Assessment of the New Kinetically Limited LDF Model for Diffusion-Limited Separations by PSA

Adegunju,

Amalraj,

Holland

et al. 2023

Ind. Eng. Chem. Res.

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The new kinetically limited linear driving force (KLLDF) model was assessed against the traditional LDF model for predicting the behavior of diffusion-limited separation by pressure swing adsorption (PSA). Carbon molecular sieve MSC 3K-172 was utilized to kinetically separate 85 vol % methane (CH 4 ) from 15 vol % carbon dioxide (CO 2 ) using two different 1-bed 6step PSA cycle schedules, A and B. They were identical except that A utilized an idle (I) step, while B instead utilized a light reflux (LR) step, with these steps having the same durations to keep the total cycle times the same. The cycle step sequences were feed pressurization (FP), feed (F), equalization down (EqD), countercurrent depressurization (CnD), LR (B), Eq up (EqU), and I (A). The Eq steps were bed-to-tank-to-bed. The LDF and KLLDF models and the mixed gas dual process Langmuir (DPL) model were executed in the dynamic adsorption process simulator (DAPS). The LDF mass transfer coefficients were measured independently, with the same ones used in both kinetic models, making the assessment predictive and fair. Eleven PSA experiments were carried out (5 with the LR cycle) at 295 K, and 345 and 101 kPa as the high and low pressures. Two cycle times (48 and 192 s) and six feed flow rates (2−15 SLPM) were evaluated, with corresponding changes in the FP and F step times, while the other steps shared two different step times. The PSA process performance results from the 11 PSA runs unequivocally showed that the KLLDF model provided nearly quantitative predictions of the experimental purities and recoveries of CH 4 and CO 2 , respectively, in the light and heavy products. The LDF model provided only qualitative predictions of the trends with extremely poor performance predictions. The weakness of the LDF model was due to its driving force being based on the partial pressure of each component in the gas mixture. In contrast, the LDF driving force of the KLLDF model depends on the actual adsorbed phase loading of each component inside the pore structure instead of its partial pressure outside of it.

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Vacuum pressure swing adsorption process with carbon molecular sieve for CO2 separation from biogas

Cited by 24 publications

References 55 publications

Recent Development in Physical, Chemical, Biological and Hybrid Biogas Upgradation Techniques

Recent Development in Physical, Chemical, Biological and Hybrid Biogas Upgradation Techniques

Supercapacitive Swing Adsorption of Carbon Dioxide: Current Status and Perspectives

Assessment of the New Kinetically Limited LDF Model for Diffusion-Limited Separations by PSA

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