Biogas separation using a membrane gas separator: Focus on CO2 upgrading without CH4 loss

Shin, Myung Seop; Jung, Kwang-Hwa; Kwag, Jung-Hoon; Jeon, Yong-Woo

doi:10.1016/j.psep.2019.07.020

Cited by 36 publications

(9 citation statements)

References 29 publications

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“…Lastly, a comparison of the performance of the main membranes selected in this study to that of other CO 2 /CH 4 mentioned by other researchers in some recent publications was carried out [49][50][51]. These referenced membranes were a generic polymeric blend membrane, an asymmetric polysulfone membrane and a polysulfone coated with a PDMS membrane, respectively.…”

Section: Module Optimizationmentioning

confidence: 99%

Multiobjective Optimization Based on “Distance-to-Target” Approach of Membrane Units for Separation of CO2/CH4

2021

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The effective separation of CO2 and CH4 mixtures is essential for many applications, such as biogas upgrading, natural gas sweetening or enhanced oil recovery. Membrane separations can contribute greatly in these tasks, and innovative membrane materials are being developed for this gas separation. The aim of this work is the evaluation of the potential of two types of highly CO2-permeable membranes (modified commercial polydimethylsiloxane and non-commercial ionic liquid–chitosan composite membranes) whose selective layers possess different hydrophobic and hydrophilic characteristics for the separation of CO2/CH4 mixtures. The study of the technical performance of the selected membranes can provide a better understanding of their potentiality. The optimization of the performance of hollow fiber modules for both types of membranes was carried out by a “distance-to-target” approach that considered multiple objectives related to the purities and recovery of both gases. The results demonstrated that the ionic liquid–chitosan composite membranes improved the performance of other innovative membranes, with purity and recovery percentage values of 86 and 95%, respectively, for CO2 in the permeate stream, and 97 and 92% for CH4 in the retentate stream. The developed multiobjective optimization allowed for the determination of the optimal process design and performance parameters, such as the membrane area, pressure ratio and stage cut required to achieve maximum values for component separation in terms of purity and recovery. Since the purities and recoveries obtained were not enough to fulfill the requirements imposed on CO2 and CH4 streams to be directly valorized, the design of more complex multi-stage separation systems was also proposed by the application of this optimization methodology, which is considered as a useful tool to advance the implementation of the membrane separation processes.

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Section: Module Optimizationmentioning

confidence: 99%

Multiobjective Optimization Based on “Distance-to-Target” Approach of Membrane Units for Separation of CO2/CH4

2021

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“…Even though CO 2 can play a useful role as a chemical reactant, pressuring agent, refrigerant, or neutralizing agent, it must be removed to improve the quality of biogas and make it more methane-rich. 13 Previously, various techniques were exploited to capture CO 2 from biogas. Water scrubbing, organic solvent scrubbing, pressure swing adsorption (PSA), membrane separation, cryogenic separation, etc.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, in some countries, biogas is mainly used for the combined heat and power (CHP) generation for several industrial plants. − CO 2 is a major component of biogas, and continuous release of this noncombusting gas results in significant increase of the greenhouse effect in the environment. Even though CO 2 can play a useful role as a chemical reactant, pressuring agent, refrigerant, or neutralizing agent, it must be removed to improve the quality of biogas and make it more methane-rich . Previously, various techniques were exploited to capture CO 2 from biogas.…”

Section: Introductionmentioning

confidence: 99%

A Review on Carbon Dioxide Minimization in Biogas Upgradation Technology by Chemical Absorption Processes

et al. 2022

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With an ever-increasing population and unpredictable climate changes, meeting energy demands and maintaining a sustainable environment on Earth are two of the greatest challenges of the future. Biogas can be a very significant renewable source of energy that can be used worldwide. However, to make it usable, upgrading the gas by removing the unwanted components is a very crucial step. CO 2 being one of the major unwanted components and also being a major greenhouse gas must be removed efficiently. Different methods such as physical adsorption, cryogenic separation, membrane separation, and chemical absorption have been discussed in detail in this review because of their availability, economic value, and lower environmental footprint. Three chemical absorption methods, including alkanolamines, alkali solvents, and amino acid salt solutions, are discussed. Their primary works with simple chemicals along with the latest works with more complex chemicals and different mechanical processes, such as the DECAB process, are discussed and compared. These discussions provide valuable insights into how different processes vary and how one is more advantageous or disadvantageous than the others. However, the best method is yet to be found with further research. Overall, this review emphasizes the need for biogas upgrading, and it discusses different methods of carbon capture while doing that. Methods discussed here can be a basic foundation for future research in carbon capture and green chemistry. This review will enlighten the readers about scientific and technological challenges regarding carbon dioxide minimization in biogas technology.

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“…In many cases, it is displacing other, more classical gas separation processes, such as adsorption, absorption, or cryogenic treatment. Using membrane techniques, good results are obtained in the separation of air components [ 2 , 3 , 4 ], biogas components [ 5 , 6 , 7 ], the separation of helium from natural gas [ 8 , 9 ], hydrogen recovery [ 10 , 11 , 12 ], natural gas sweetening [ 13 , 14 , 15 ], or air dehydration [ 16 ] and natural gas dehydration [ 17 , 18 ]. In order to improve the efficiency of the membrane process and to optimize the energy consumption of such a process, single or multi-stage plants are used, along with recirculation of selected streams [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Process Parameters on the Properties of Homogeneous and Heterogeneous Membranes for Gas Separation

Polak

Szwast

2022

Membranes

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Heterogeneous membranes, otherwise known as Mixed Matrix Membranes (MMMs), which are used in gas separation processes, are the subject of growing interest. This is due to their potential to improve the process properties of membranes compared to those of homogeneous membranes, i.e., those made of polymer only. Using such membranes in a process involves subjecting them to varying temperatures and pressures. This paper investigates the effects of temperature and feed pressure on the process properties of homogeneous and heterogeneous membranes. Membranes made of Pebax®2533 copolymer and containing additional fillers such as SiO2, ZIF−8, and POSS-Ph were investigated. Tests were performed over a temperature range of 25–55°C and a pressure range of 2–8 bar for N2, CH4, and CO2 gases. It was found that temperature positively influences the increase in permeability, while pressure influences permeability depending on the gas used, which is related to the effect of pressure on the solubility of the gas in the membrane.

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Biogas separation using a membrane gas separator: Focus on CO2 upgrading without CH4 loss

Cited by 36 publications

References 29 publications

Multiobjective Optimization Based on “Distance-to-Target” Approach of Membrane Units for Separation of CO2/CH4

Multiobjective Optimization Based on “Distance-to-Target” Approach of Membrane Units for Separation of CO2/CH4

A Review on Carbon Dioxide Minimization in Biogas Upgradation Technology by Chemical Absorption Processes

Analysis of the Influence of Process Parameters on the Properties of Homogeneous and Heterogeneous Membranes for Gas Separation

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