Assessment of CO2 removal from power station flue gas

Leci, C.L.; Goldthorpe, S.H.

doi:10.1016/0196-8904(92)90046-y

Cited by 10 publications

(4 citation statements)

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“…The actual pressure used should be based on the tradeoff between the capital costs of the membrane and compressor and the operating cost of compression. Matsumiya et al and Leci and Goldthorpe used a feed pressure of 1000 and 3500 kPa, respectively, in evaluating membrane processes for CO 2 removal from coal-fired power plant flue gases. A feed pressure of 790 kPa was used in this work in consideration that such a pressure can be readily achieved with commonly used compressors.…”

Section: Resultsmentioning

confidence: 99%

CO₂/N₂ Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

Liu

Chakma

Feng

2005

Ind. Eng. Chem. Res.

101

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Thin film poly(ether block amide) (PEBA) hollow fiber composite membranes were developed for CO2/N2 separation, which is relevant to CO2 capture from flue gas for greenhouse gas emission control. The membrane was prepared by coating a thin layer of PEBA onto microporous polyetherimide (PEI) hollow fiber substrate membranes. Lab-scale hollow fiber membrane modules were assembled and tested for CO2/N2 separation with various flow configurations using a simulated flue gas (15.3% carbon dioxide, balance N2) as the feed. The shell side feed with counter-current flow was shown to perform better than other configurations over a wide range of stage cuts in terms of product purity, recovery, and productivity. At 23 °C and 790 kPa, a permeate stream containing 62 mol % CO2 was obtained at a CO2 recovery of 20% in a single-stage operation, whereas 99.4 mol % nitrogen could be produced in the residue with a nitrogen recovery of 36%. It was found that the permeance of CO2 in the gas mixture was lower than the permeance of pure CO2 at the same pressure, while there was little difference in nitrogen permeance between pure gas permeation and gas mixture permeation. The PEBA/PEI thin film hollow fiber composite membrane was not suitable for bore side feed operation because of the potential problems associated with concentration polarization in the microporous substrate and the structural integrity of the membrane when a high pressure was applied in the fiber lumen.

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Section: Resultsmentioning

confidence: 99%

CO₂/N₂ Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

Liu

Chakma

Feng

2005

Ind. Eng. Chem. Res.

101

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“…activated carbon and zeolite) (Fuderer and Rudelstorfer 1976;Sircar, 1979Sircar, , 1988Sircar and Kratz 1988;Chue et al 1995), and (c) separation by a membrane (e.g. polymeric) (Koros and Chern 1987;Leci and Goldthorpe 1992;Matsumoto et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Reversible chemisorption of carbon dioxide: simultaneous production of fuel-cell grade H2 and compressed CO2 from synthesis gas

et al. 2007

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One vision of clean energy for the future is to produce hydrogen from coal in an ultra-clean plant. The conventional route consists of reacting the coal gasification product (after removal of trace impurities) with steam in a water gas shift (WGS) reactor to convert CO to CO 2 and H 2 , followed by purification of the effluent gas in a pressure swing adsorption (PSA) unit to produce a high purity hydrogen product. PSA processes can also be designed to produce a CO 2 by-product at ambient pressure. This work proposes a novel concept called "Thermal Swing Sorption Enhanced Reaction (TSSER)" which simultaneously carries out the WGS reaction and the removal of CO 2 from the reaction zone by using a CO 2 chemisorbent in a single unit operation. The concept directly produces a fuel-cell grade H 2 and compressed CO 2 as a by-product gas. Removal of CO 2 from the reaction zone circumvents the equilibrium limitations of the reversible WGS reaction and enhances its forward rate of reaction. Recently measured sorption-desorption characteristics of two novel, reversible CO 2 chemisorbents (K 2 CO 3 promoted hydrotalcite and Na 2 O promoted alumina) are reviewed and the simulated performance of the proposed TSSER concept using the promoted hydrotalcite as the chemisorbent is reported.

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“…The separation mechanism is essentially absorption. The gas flows through one side of the membrane while a CO 2 selective solvent like an amine solution flows through the other side 4, 32, 33. The CO 2 ‐laden solvent leaving the membrane is thermally regenerated in a separate unit to produce the high purity CO 2 gas.…”

Section: Introductionmentioning

confidence: 99%

Removal and recovery of compressed CO₂ from flue gas by a novel thermal swing chemisorption process

Lee

Sircar

2008

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).A synopsis of the published literature on removal of CO 2 from a flue gas is given. A novel thermal swing chemisorption (TSC) process concept is proposed for removal and recovery of compressed CO 2 from a flue gas without precompression, predrying, or precooling. The process uses Na 2 O promoted alumina as a reversible CO 2 selective chemisorbent in conjunction with the principles of rapid thermal swing adsorption for direct production of compressed CO 2 from a flue gas. Several complementary process steps are used in the design to compress the product CO 2 and to achieve high CO 2 recovery and sorbent capacity utilization. Judicious steam purge steps are used for highly efficient sorbent regeneration and to minimize the steam requirement. The CO 2 chemisorption characteristics of the sorbent are reviewed and a model simulation of the TSC process performance is reported.

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Assessment of CO2 removal from power station flue gas

Cited by 10 publications

References 0 publications

CO₂/N₂ Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

CO₂/N₂ Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

Reversible chemisorption of carbon dioxide: simultaneous production of fuel-cell grade H2 and compressed CO2 from synthesis gas

Removal and recovery of compressed CO₂ from flue gas by a novel thermal swing chemisorption process

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Assessment of CO2 removal from power station flue gas

Cited by 10 publications

References 0 publications

CO2/N2 Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

CO2/N2 Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

Reversible chemisorption of carbon dioxide: simultaneous production of fuel-cell grade H2 and compressed CO2 from synthesis gas

Removal and recovery of compressed CO2 from flue gas by a novel thermal swing chemisorption process

Contact Info

Product

Resources

About

CO₂/N₂ Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

CO₂/N₂ Separation by Poly(Ether Block Amide) Thin Film Hollow Fiber Composite Membranes

Removal and recovery of compressed CO₂ from flue gas by a novel thermal swing chemisorption process