Considerations for treating impurities in oxy-combustion flue gas prior to sequestration

Sass, Bruce; Farzan, Hamid; Prabhakar, R.; Gerst, Jacqueline; Sminchak, Joel; Bhargava, Mohit; Nestleroth, Bruce; Figueroa, José

doi:10.1016/j.egypro.2009.01.071

Cited by 20 publications

(13 citation statements)

References 2 publications

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“…As flue gas streams emanating from post-combustion coal-fired power plants contain relatively low concentrations of CO 2 (15%) and large quantities of N 2 (75%) 42 , a potential CO 2 capture adsorbent must also be capable of selectively adsorbing the CO 2 component of the gas mixture, such that only pure CO 2 is captured and subjected to sequestration 43 . In fact, the purity of the recovered CO 2 has a significant impact on the technical feasibility of developing an adequate transport and storage infrastructure 44 and is, therefore, critical to CCUS economics. Thus, in this study, the single-component adsorption isotherm for N 2 was measured and compared with the experimental CO 2 isotherm data to evaluate the adsorption selectivity for CO 2 over N 2 ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Holey graphene frameworks for highly selective post-combustion carbon capture

Chowdhury

Balasubramanian

2016

Sci Rep

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Atmospheric CO2 concentrations continue to rise rapidly in response to increased combustion of fossil fuels, contributing to global climate change. In order to mitigate the effects of global warming, development of new materials for cost-effective and energy-efficient CO2 capture is critically important. Graphene-based porous materials are an emerging class of solid adsorbents for selectively removing CO2 from flue gases. Herein, we report a simple and scalable approach to produce three-dimensional holey graphene frameworks with tunable porosity and pore geometry, and demonstrate their application as high-performance CO2 adsorbents. These holey graphene macrostructures exhibit a significantly improved specific surface area and pore volume compared to their pristine counterparts, and can be effectively used in post-combustion CO2 adsorption systems because of their intrinsic hydrophobicity together with good gravimetric storage capacities, rapid removal capabilities, superior cycling stabilities, and moderate initial isosteric heats. In addition, an exceptionally high CO2 over N2 selectivity can be achieved under conditions relevant to capture from the dry exhaust gas stream of a coal burning power plant, suggesting the possibility of recovering highly pure CO2 for long-term sequestration and/or utilization for downstream applications.

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Section: Resultsmentioning

confidence: 99%

Holey graphene frameworks for highly selective post-combustion carbon capture

Chowdhury

Balasubramanian

2016

Sci Rep

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“…The large oxygen value suggests that a further separation step is needed to purify the CO 2 before sequestration. Existing CO 2 pipelines can require less than 40 ppmv oxygen, with moisture less than 650 ppm (Sass et al ., 2009 ;NETL, 2011). A similar purifi cation problem exists in pulverized coal oxy-combustion, and has been addressed with the development of cryogenic purifi cation systems (Darde et al .…”

Section: Requirements For the Oxy-fuel Combustormentioning

confidence: 98%

Novel cycles: oxy-combustion turbine cycle systems

Richards

Williams²,

Casleton

2012

Combined Cycle Systems for Near-Zero Emission Power Generation

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“…The impurities take account of mole fraction of 15-25% to total flue gas (on dry basis). Sass et al (2009) discuss that the impurities in the oxy-fuel combustion flue gas affect the transportation and the storage process including increase of compression pressure, corrosion, and reduction of effective storage capacity.…”

Section: Impurities On Oxy-coal Combustionmentioning

confidence: 99%