Hybrid Membrane-absorption CO2 Capture Process

Freeman, Brice; Hao, Pengfei; Baker, Richard W.; Kniep, Jay; Chen, Eric; Ding, Junyuan; Zhang, Yue; Rochelle, Gary T.

doi:10.1016/j.egypro.2014.11.065

Cited by 58 publications

(28 citation statements)

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“…The membrane is characterised by high level of compactness, ability to address thermodynamic limitations [156], high contact area [157] owing to drastic reduction in the size of the unit [158] at the expense however of generally high membrane cost. This technology has been employed for carbon capture [159], in photochemical [160,161], electrochemical [162], and thermochemical [82] CO 2 conversion processes aiming to overcome mass transfer resistance and enhance energy efficiency. With multifunctional units such as these membrane-integrated reactors, combining two functions into one unit should reduce the capital cost of the single unit compared to the individual reactor and membrane separation unit [163].…”

Section: Intensification Using Membrane Separators and Reactorsmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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With the concentration of CO 2 in the atmosphere increasing beyond sustainable limits, much research is currently focused on developing solutions to mitigate this problem. Possible strategies involve sequestering the emitted CO 2 for long-term storage deep underground, and conversion of CO 2 into value-added products. Conventional processes for each of these solutions often have high-capital costs associated and kinetic limitations in different process steps. Additionally, CO 2 is thermodynamically a very stable molecule and difficult to activate. Despite such challenges, a number of methods for CO 2 capture and conversion have been investigated including absorption, photocatalysis, electrochemical and thermochemical methods. Conventional technologies employed in these processes often suffer from low selectivity and conversion, and lack energy efficiency. Therefore, suitable process intensification techniques based on equipment, material and process development strategies can play a key role at enabling the deployment of these processes. In this review paper, the cutting-edge intensification technologies being applied in CO 2 capture and conversion are reported and discussed, with the main focus on the chemical conversion methods.

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Section: Intensification Using Membrane Separators and Reactorsmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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“…A result showed that the higher the membrane CO 2 permeance, the lower the membrane area requirements; while the higher CO 2 /N 2 selectivity, the higher CO 2 purity and the lower energy requirement. Process simulator ChemCAD has been applied to study membrane-based processes in several applications, such as production of oxygen-enriched air [8], CO 2 capture in power plants [9,10], syngas purification [11], and methane enrichment process [12]. For instance, Merkel et al [9] performed a techno-economic comparison of two membrane process designs for 90% CO 2 capture from a 600 MW coal-fired power plant.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of a Two-Stage Membrane System for Hydrogen Separation in Refining Processes

Arias¹,

Scenna

et al. 2018

Processes

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This paper fits into the process system engineering field by addressing the optimization of a two-stage membrane system for H 2 separation in refinery processes. To this end, a nonlinear mathematical programming (NLP) model is developed to simultaneously optimize the size of each membrane stage (membrane area, heat transfer area, and installed power for compressors and vacuum pumps) and operating conditions (flow rates, pressures, temperatures, and compositions) to achieve desired target levels of H 2 product purity and H 2 recovery at a minimum total annual cost. Optimal configuration and process design are obtained from a model which embeds different operating modes and process configurations. For instance, the following candidate ways to create the driving force across the membrane are embedded: (a) compression of both feed and/or permeate streams, or (b) vacuum application in permeate streams, or (c) a combination of (a) and (b). In addition, the potential selection of an expansion turbine to recover energy from the retentate stream (energy recovery system) is also embedded. For a H 2 product purity of 0.90 and H 2 recovery of 90%, a minimum total annual cost of 1.764 M$·year −1 was obtained for treating 100 kmol·h −1 with 0.18, 0.16, 0.62, and 0.04 mole fraction of H 2 , CO, N 2 , CO 2 , respectively. The optimal solution selected a combination of compression and vacuum to create the driving force and removed the expansion turbine. Afterwards, this optimal solution was compared in terms of costs, process-unit sizes, and operating conditions to the following two sub-optimal solutions: (i) no vacuum in permeate stream is applied, and (ii) the expansion turbine is included into the process. The comparison showed that the latter (ii) has the highest total annual cost (TAC) value, which is around 7% higher than the former (i) and 24% higher than the found optimal solution. Finally, a sensitivity analysis to investigate the influence of the desired H 2 product purity and H 2 recovery is presented. Opposite cost-based trade-offs between total membrane area and total electric power were observed with the variations of these two model parameters. This paper contributes a valuable decision-support tool in the process system engineering field for designing, simulating, and optimizing membrane-based systems for H 2 separation in a particular industrial case; and the presented optimization results provide useful guidelines to assist in selecting the optimal configuration and operating mode.

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“…It is therefore necessary to establish a hybrid membrane separation‐chemical absorption system to maximize the intensification for post‐combustion CO 2 capture. There is little research on hybrid carbon capture systems for post‐combustion; most of the studies are at the numerical simulation stage . Thus, a specific experimental study should be implemented to improve research content.…”

Section: Introductionmentioning

confidence: 99%

“…There is little research on hybrid carbon capture systems for post-combustion; most of the studies are at the numerical simulation stage. [28][29][30][31][32][33][34] Thus, a specific experimental study should be implemented to improve research content.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on hybrid MS‐CA system for post‐combustion CO₂ capture

Jiang

Zhang

et al. 2017

Greenhouse Gases

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A lab‐scale hybrid membrane separation‐chemical absorption (MS‐CA) system for a post‐combustion process was implemented by combining a hollow‐fibre membrane module and a packed column in series. A solution‐diffusion model and double‐film theory were adopted to investigate the mass‐transfer performance of membrane separation and the chemical absorption process. To determine optimal operational conditions, experiments were conducted to investigate the mass transfer characteristics and CO2 removal of both mono‐staged systems. A hybrid MS‐CA method was studied to measure coupling characteristics and CO2 removal performance of the system. It was found that increasing the pressure and the temperature of the feed gas enhanced the CO2 diffusion property of the membrane module. For a packed column, mass transfer and carbon capture is affected by the liquid‐to‐gas ratio; TMEA = 40°C is considered the optimal condition. For a hybrid MS‐CA system, the optimal CO2 removal efficiency can reach 99.49% at the condition of Pf = 1 MPa, wMEA = 10 wt%. Improving the feed‐gas pressure will increase the CO2 absorption rate of the overall hybrid system. Compared with the mono‐staged method, the hybrid MS‐CA system has a higher stability and efficiency for the post‐combustion process, especially at a relatively low feed‐gas pressure. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Hybrid Membrane-absorption CO2 Capture Process

Cited by 58 publications

References 1 publication

Process intensification technologies for CO2 capture and conversion – a review

Process intensification technologies for CO2 capture and conversion – a review

Optimal Design of a Two-Stage Membrane System for Hydrogen Separation in Refining Processes

Experimental study on hybrid MS‐CA system for post‐combustion CO₂ capture

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Hybrid Membrane-absorption CO2 Capture Process

Cited by 58 publications

References 1 publication

Process intensification technologies for CO2 capture and conversion – a review

Process intensification technologies for CO2 capture and conversion – a review

Optimal Design of a Two-Stage Membrane System for Hydrogen Separation in Refining Processes

Experimental study on hybrid MS‐CA system for post‐combustion CO2 capture

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Experimental study on hybrid MS‐CA system for post‐combustion CO₂ capture