Comparative thermodynamic analysis and integration issues of CCS steam power plants based on oxy-combustion with cryogenic or membrane based air separation

Pfaff, Imo; Kather, Alfons

doi:10.1016/j.egypro.2009.01.066

Cited by 164 publications

(74 citation statements)

References 2 publications

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“…In the literature (Pfaff and Kather, 2009;van Hassel, 2004), pressure drop along the membrane is often neglected or assumed to be a fixed value. However, calculation of pressure loss is essential for a proper evaluation of the efficiency of the power plant in which the membrane is integrated (Brinkmann et al, 2015).…”

Section: Fluid-dynamics Modellingmentioning

confidence: 99%

CO 2 capture from natural gas combined cycles by CO 2 selective membranes

Turi

Ferrari

Chiesa

et al. 2017

International Journal of Greenhouse Gas Control

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This paper performs a techno-economic analysis of natural gas-fired combined cycle (NGCC) power plants integrated with CO2 selective membranes for post-combustion CO2 capture. The configuration assessed is based on a two-membrane system: a CO2 capture membrane that separates the CO2 for final sequestration and a CO2 recycle membrane that selectively recycles CO2 to the gas turbine compressor inlet in order to increase the CO2 concentration in the gas turbine flue gas. Three different membrane technologies with different permeability and selectivity have been investigated. The mass and energy balances are calculated by integrating a power plant model, a membrane model and a CO2 purification unit model. An economic model is then used to estimate the cost of electricity and of CO2 avoided. A sensitivity analysis on the main process parameters and economic assumptions is also performed. It was found that a combination of a high permeability membrane with moderate selectivity as a recycle membrane and a very high selectivity membrane with high permeability used for the capture membrane resulted in the lowest CO2 avoided cost of 75 US$/tCO2. This plant features a feed pressure of 1.5 bar and a permeate pressure of 0.2 bar for the capture membrane. This result suggests that membrane systems can be competitive for CO2 capture from NGCC power plants when compared with MEA absorption. However, to achieve significant advantages with respect to benchmark MEA capture, better membrane permeability and lower costs are needed with respect to the state of the art technology. In addition, due to the selective recycle, the gas turbine operates with a working fluid highly enriched with CO2. This requires redesigning gas turbine components, which may represent a major challenge for commercial deployment.

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Section: Fluid-dynamics Modellingmentioning

confidence: 99%

CO 2 capture from natural gas combined cycles by CO 2 selective membranes

Turi

Ferrari

Chiesa

et al. 2017

International Journal of Greenhouse Gas Control

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“…Since only oxygen penetrates the membrane, a high purity can be obtained provided that leaks within the membrane module are avoided. 8,69,70 Basic prerequisites for a large-scale utilization of membrane techniques in power plants are adequate membrane materials, an optimal process design and a sufficient mechanical strength of the membranes.…”

mentioning

confidence: 99%

Worldwide innovations in the development of carbon capture technologies and the utilization of CO2

Markewitz

Kuckshinrichs

Leitner

et al. 2012

Energy Environ. Sci.

1,067

608

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“…These membranes are made of oxygen ion conductors operating at a temperature of 700-900 °C (950 °C). With these materials it is theoretically possible to separate oxygen with a purity of 100% (Pfaff and Kather, 2009). This type of ASU has lower auxiliary power than other types of ASU because of possibility of expander implementation.…”

Section: Introductionmentioning

confidence: 99%

“…This solution greatly reduces the auxiliary power of air separation unit by reducing the flue gas flow rate at the inlet to the cryogenic separation unit. The last and also the least studied method is the use of ion transport membranes (ITM) for air separation (Bredesen et al, 2004;Engels et al, 2010;Gambini and Vellini, 2012;Pfaff and Kather, 2009). These membranes are made of oxygen ion conductors operating at a temperature of 700-900 °C (950 °C).…”

Section: Introductionmentioning

confidence: 99%

Determination of technical and economic parameters of an ionic transport membrane air separation unit working in a supercritical power plant

Kotowicz

Michalski

Balicki

2016

Chemical and Process Engineering

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In this paper an air separation unit was analyzed. The unit consisted of: an ionic transport membrane contained in a four-end type module, an air compressor, an expander fed by gas that remains after oxygen separation and heat exchangers which heat the air and recirculated flue gas to the membrane operating temperature (850 °C). The air separation unit works in a power plant with electrical power equal to 600 MW. This power plant additionally consists of: an oxy-type pulverized-fuel boiler, a steam turbine unit and a carbon dioxide capture unit. Life steam parameters are 30 MPa/650 °C and reheated steam parameters are 6 MPa/670 °C. The listed units were analyzed. For constant electrical power of the power plant technical parameters of the air separation unit for two oxygen recovery rate (65% and 95%) were determined. One of such parameters is ionic membrane surface area. In this paper the formulated equation is presented. The remaining technical parameters of the air separation unit are, among others: heat exchange surface area, power of the air compressor, power of the expander and auxiliary power. Using the listed quantities, the economic parameters, such as costs of air separation unit and of individual components were determined. These quantities allowed to determine investment costs of construction of the air separation unit. In addition, they were compared with investment costs for the entire oxy-type power plant.

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Comparative thermodynamic analysis and integration issues of CCS steam power plants based on oxy-combustion with cryogenic or membrane based air separation

Cited by 164 publications

References 2 publications

CO 2 capture from natural gas combined cycles by CO 2 selective membranes

CO 2 capture from natural gas combined cycles by CO 2 selective membranes

Worldwide innovations in the development of carbon capture technologies and the utilization of CO2

Determination of technical and economic parameters of an ionic transport membrane air separation unit working in a supercritical power plant

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