The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform

Kevin Bishop - One of the best experts on this subject based on the ideXlab platform.

  • Carbon Dioxide Transport across the hillslope-riparian-stream continuum in a boreal headwater catchment
    Biogeosciences, 2015
    Co-Authors: Fraser Leith, Kerry J. Dinsmore, Marcus B. Wallin, Michael F. Billett, Kate V. Heal, Hjalmar Laudon, Mats G. Öquist, Kevin Bishop
    Abstract:

    Abstract. Headwater streams export CO2 as lateral downstream export and vertical evasion from the stream surface. CO2 in boreal headwater streams generally originates from adjacent terrestrial areas, so determining the sources and rate of CO2 Transport along the hillslope–riparian–stream continuum could improve estimates of CO2 export via the aquatic pathway, especially by quantifying evasion at higher temporal resolutions. Continuous measurements of dissolved CO2 concentrations and water table were made along the hillslope–riparian–stream continuum in the Vastrabacken sub-catchment of the Krycklan catchment, Sweden. Daily water and CO2 export from the hillslope and riparian zone were estimated over one hydrological year (October 2012–September 2013) using a flow-concentration model and compared with measured lateral downstream CO2 export. Total water export over the hydrological year from the hillslope was 230 mm yr−1 compared with 270 mm yr−1 from the riparian zone. This corresponds well (proportional to the relative upslope contributing area) to the annual catchment runoff of 265 mm yr−1. Total CO2 export from the riparian zone to the stream was 3.0 g CO2-C m−2 yr−1. A hotspot for riparian CO2 export was observed at 30–50 cm depth (accounting for 71 % of total riparian export). Seasonal variability was high with export peaks during the spring flood and autumn storm events. Downstream lateral CO2 export (determined from stream water dissolved CO2 concentrations and discharge) was 1.2 g CO2-C m−2 yr−1. Subtracting downstream lateral export from riparian export (3.0 g CO2-C m−2 yr−1) gives 1.8 g CO2-C m−2 yr−1 which can be attributed to evasion losses (accounting for 60 % of export via the aquatic pathway). The results highlight the importance of terrestrial CO2 export, especially from the riparian zone, for determining catchment aquatic CO2 losses and the importance of the CO2 evasion component to Carbon export via the aquatic conduit.

  • Carbon Dioxide Transport across the hillslope–riparian–stream continuum in a boreal headwater catchment
    2014
    Co-Authors: F. I. Leith, Kerry J. Dinsmore, Marcus B. Wallin, Michael F. Billett, Kate V. Heal, Hjalmar Laudon, Mats G. Öquist, Kevin Bishop
    Abstract:

    Abstract. Headwater streams export CO2 as lateral downstream export and vertical evasion from the stream surface. CO2 in boreal headwater streams generally originates from adjacent terrestrial areas, so determining the sources and rate of CO2 Transport along the hillslope–riparian–stream continuum could improve estimates of CO2 export via the aquatic pathway, especially by quantifying evasion at higher temporal resolutions. Continuous measurements of dissolved CO2 concentrations and water table were made along the hillslope–riparian–stream continuum in the Västrabäcken sub-catchment of the Krycklan Catchment, Sweden. Daily water and CO2 export from the hillslope and riparian zone were estimated over one hydrological year (October 2012–September 2013) using a flow-concentration model and compared with measured lateral downstream CO2 export. Total water export over the hydrological year from the hillslope was 230 mm yr-1 compared with 270 mm yr-1 from the riparian zone. This corresponds well (proportional to the relative upslope contributing area) to the annual catchment runoff of 265 mm yr-1. Total CO2 export from the riparian zone to the stream was 3.0 g CO2-C m-2 yr-1. A hotspot for riparian CO2 export was observed at 30–50 cm depth (accounting for 71% of total riparian export). Seasonal variability was high with export peaks during the spring flood and autumn storm events. Downtream lateral CO2 export (determined from stream water dissolved CO2 concentrations and discharge) was 1.2 g CO2-C m-2 yr-1. Subtracting downstream lateral export from riparian export (3.0 g CO2-C m-2 yr-1) gives 1.8 g CO2-C m-2 yr-1 which can be attributed to evasion losses (accounting for 60% of export via the aquatic pathway). The results highlight the importance of terrestrial CO2 export, especially from the riparian zone, for determining catchment aquatic CO2 losses and the importance of the CO2 evasion component to Carbon export via the aquatic conduit.

Stefan Belfroid - One of the best experts on this subject based on the ideXlab platform.

  • Dynamics of Carbon Dioxide Transport in a Multiple Sink Network
    Energy Procedia, 2013
    Co-Authors: Jeremy Veltin, Stefan Belfroid
    Abstract:

    Abstract As Carbon Capture and Storage slowly gets accepted and integrated as a mean for cleaner utilization of fossil fuels, the integration of capture, Transport and storage becomes a key component to properly design a CO2 network. While the boundary conditions set by the capture and storage units have been the subject of much research, less attention has been paid to the challenges presented by the design and operation of full scale Transport networks. Transport can however present a number of operational issues, especially due to the combination of horizontal and vertical flows, and the eventual presence of multiple injection wells. This paper provides an assessment of some issues occurring during Transport of CO2 for injection in multiple sinks.

  • Dynamics of Carbon Dioxide Transport in a multiple sink network (GHGT-11)
    Energy Procedia, 2013
    Co-Authors: Jeremy Veltin, Stefan Belfroid
    Abstract:

    As Carbon Capture and Storage slowly gets accepted and integrated as a mean for cleaner utilization of fossil fuels, the integration of capture, Transport and storage becomes a key component to properly design a CO2 network. While the boundary conditions set by the capture and storage units have been the subject of much research, less attention has been paid to the challenges presented by the design and operation of full scale Transport networks. Transport can however present a number of operational issues, especially due to the combination of horizontal and vertical flows, and the eventual presence of multiple injection wells. This paper provides an assessment of some issues occurring during Transport of CO2 for injection in multiple sinks.

Juan J. Iruin - One of the best experts on this subject based on the ideXlab platform.

  • Miscibility and Carbon Dioxide Transport properties of blends of bacterial poly(3-hydroxybutyrate) and a poly(vinylidene chloride-co-acrylonitrile) copolymer
    Polymer, 2002
    Co-Authors: Alba González, Marian Iriarte, P.j. Iriondo, Juan J. Iruin
    Abstract:

    The purpose of this work is to study the CO2 Transport properties of isotactic poly(3-hydroxybutyrate) (iPHB) blended with a miscible second component, a copolymer of vinylidene chloride (VDC) and acrylonitrile (AN) units. All the investigated blends are rubbery, allowing a reasonable strategy to tough PHB without impairing its original biodegradability. The miscibility required for this purpose was confirmed by differential scanning calorimetry, measuring both the glass transition and melting temperatures of the blends. The melting point depression induced by the copolymer was used to quantify the interactions between the components of the blend. Carbon Dioxide Transport properties of blends having less than 50% by weight of the copolymer were measured by gravimetric sorption experiments in a Cahn electro balance. The effect of the VDC-co-AN copolymer was to decrease the diffusivity and permeability of the pure iPHB due to its well-known high barrier character.

  • Carbon Dioxide Transport properties of composite membranes of a polyetherimide and a liquid crystal polymer
    European Polymer Journal, 1998
    Co-Authors: C. Uriarte, J. Alfageme, Juan J. Iruin
    Abstract:

    Abstract The effect of the addition of a liquid crystal polymer (Rodrun) on the gas sorption and Transport properties of a polyetherimide (PEI, Ultem 1000) was investigated. CO 2 permeation and sorption measurements were made with films of PEI, Rodrun and heterogeneous PEI/Rodrun blends at different pressures and temperatures. In all cases, permeability, diffusion and sorption coefficients decreased when the amount of Rodrun increased. A good agreement was found when permeability data obtained using both a permeability cell and a Cahn electrobalance were compared. Permeabilities of the binary composite material were calculated on the basis of those of the pure components and some theoretical assumptions concerning blend morphology. Results were consistent with a Rodrun structure in the composite intermediate between a fibrillar and a laminar morphology, as electron microscopy evidenced experimentally.

Fraser Leith - One of the best experts on this subject based on the ideXlab platform.

  • Carbon Dioxide Transport across the hillslope-riparian-stream continuum in a boreal headwater catchment
    Biogeosciences, 2015
    Co-Authors: Fraser Leith, Kerry J. Dinsmore, Marcus B. Wallin, Michael F. Billett, Kate V. Heal, Hjalmar Laudon, Mats G. Öquist, Kevin Bishop
    Abstract:

    Abstract. Headwater streams export CO2 as lateral downstream export and vertical evasion from the stream surface. CO2 in boreal headwater streams generally originates from adjacent terrestrial areas, so determining the sources and rate of CO2 Transport along the hillslope–riparian–stream continuum could improve estimates of CO2 export via the aquatic pathway, especially by quantifying evasion at higher temporal resolutions. Continuous measurements of dissolved CO2 concentrations and water table were made along the hillslope–riparian–stream continuum in the Vastrabacken sub-catchment of the Krycklan catchment, Sweden. Daily water and CO2 export from the hillslope and riparian zone were estimated over one hydrological year (October 2012–September 2013) using a flow-concentration model and compared with measured lateral downstream CO2 export. Total water export over the hydrological year from the hillslope was 230 mm yr−1 compared with 270 mm yr−1 from the riparian zone. This corresponds well (proportional to the relative upslope contributing area) to the annual catchment runoff of 265 mm yr−1. Total CO2 export from the riparian zone to the stream was 3.0 g CO2-C m−2 yr−1. A hotspot for riparian CO2 export was observed at 30–50 cm depth (accounting for 71 % of total riparian export). Seasonal variability was high with export peaks during the spring flood and autumn storm events. Downstream lateral CO2 export (determined from stream water dissolved CO2 concentrations and discharge) was 1.2 g CO2-C m−2 yr−1. Subtracting downstream lateral export from riparian export (3.0 g CO2-C m−2 yr−1) gives 1.8 g CO2-C m−2 yr−1 which can be attributed to evasion losses (accounting for 60 % of export via the aquatic pathway). The results highlight the importance of terrestrial CO2 export, especially from the riparian zone, for determining catchment aquatic CO2 losses and the importance of the CO2 evasion component to Carbon export via the aquatic conduit.

Jeremy Veltin - One of the best experts on this subject based on the ideXlab platform.

  • Dynamics of Carbon Dioxide Transport in a Multiple Sink Network
    Energy Procedia, 2013
    Co-Authors: Jeremy Veltin, Stefan Belfroid
    Abstract:

    Abstract As Carbon Capture and Storage slowly gets accepted and integrated as a mean for cleaner utilization of fossil fuels, the integration of capture, Transport and storage becomes a key component to properly design a CO2 network. While the boundary conditions set by the capture and storage units have been the subject of much research, less attention has been paid to the challenges presented by the design and operation of full scale Transport networks. Transport can however present a number of operational issues, especially due to the combination of horizontal and vertical flows, and the eventual presence of multiple injection wells. This paper provides an assessment of some issues occurring during Transport of CO2 for injection in multiple sinks.

  • Dynamics of Carbon Dioxide Transport in a multiple sink network (GHGT-11)
    Energy Procedia, 2013
    Co-Authors: Jeremy Veltin, Stefan Belfroid
    Abstract:

    As Carbon Capture and Storage slowly gets accepted and integrated as a mean for cleaner utilization of fossil fuels, the integration of capture, Transport and storage becomes a key component to properly design a CO2 network. While the boundary conditions set by the capture and storage units have been the subject of much research, less attention has been paid to the challenges presented by the design and operation of full scale Transport networks. Transport can however present a number of operational issues, especially due to the combination of horizontal and vertical flows, and the eventual presence of multiple injection wells. This paper provides an assessment of some issues occurring during Transport of CO2 for injection in multiple sinks.