The Experts below are selected from a list of 1518 Experts worldwide ranked by ideXlab platform

Peter Englezos - One of the best experts on this subject based on the ideXlab platform.

  • medium pressure clathrate hydrate membrane hybrid process for postcombustion capture of carbon dioxide
    Environmental Science & Technology, 2008
    Co-Authors: Praveen Linga, Adebola Adeyemo, Peter Englezos
    Abstract:

    This study presents a medium-pressure CO2 capture process based on hydrate crystallization in the presence of tetrahydrofuran (THF). THF reduces the incipient equilibrium hydrate formation conditions from a CO2/N2 gas mixture. Relevant thermodynamic data at 0.5, 1.0, and 1.5 mol % THF were obtained and reported. In addition, the kinetics of hydrate formation from the CO2/N2/THF system as well as the CO2 recovery and separation efficiency were also determined experimentally at 273.75 K. The above data were utilized to develop the Block Flow Diagram of the proposed process. The process involves three hydrate stages coupled with a membrane-based gas separation process. The there hydrate stages operate at 2.5 MPa and 273.75 K. This operating pressure is substantially less than the pressure required in the absence of THF and hence the compression costs are reduced from 75 to 53% of the power produced for a typical 500 MW power plant.

  • Medium-pressure clathrate hydrate/membrane hybrid process for postcombustion capture of carbon dioxide.
    Environmental science & technology, 2008
    Co-Authors: Praveen Linga, Adebola Adeyemo, Peter Englezos
    Abstract:

    This study presents a medium-pressure CO2 capture process based on hydrate crystallization in the presence of tetrahydrofuran (THF). THF reduces the incipient equilibrium hydrate formation conditions from a CO2/N2 gas mixture. Relevant thermodynamic data at 0.5, 1.0, and 1.5 mol % THF were obtained and reported. In addition, the kinetics of hydrate formation from the CO2/N2/THF system as well as the CO2 recovery and separation efficiency were also determined experimentally at 273.75 K. The above data were utilized to develop the Block Flow Diagram of the proposed process. The process involves three hydrate stages coupled with a membrane-based gas separation process. The there hydrate stages operate at 2.5 MPa and 273.75 K. This operating pressure is substantially less than the pressure required in the absence of THF and hence the compression costs are reduced from 75 to 53% of the power produced for a typical 500 MW power plant.

Praveen Linga - One of the best experts on this subject based on the ideXlab platform.

  • medium pressure clathrate hydrate membrane hybrid process for postcombustion capture of carbon dioxide
    Environmental Science & Technology, 2008
    Co-Authors: Praveen Linga, Adebola Adeyemo, Peter Englezos
    Abstract:

    This study presents a medium-pressure CO2 capture process based on hydrate crystallization in the presence of tetrahydrofuran (THF). THF reduces the incipient equilibrium hydrate formation conditions from a CO2/N2 gas mixture. Relevant thermodynamic data at 0.5, 1.0, and 1.5 mol % THF were obtained and reported. In addition, the kinetics of hydrate formation from the CO2/N2/THF system as well as the CO2 recovery and separation efficiency were also determined experimentally at 273.75 K. The above data were utilized to develop the Block Flow Diagram of the proposed process. The process involves three hydrate stages coupled with a membrane-based gas separation process. The there hydrate stages operate at 2.5 MPa and 273.75 K. This operating pressure is substantially less than the pressure required in the absence of THF and hence the compression costs are reduced from 75 to 53% of the power produced for a typical 500 MW power plant.

  • Medium-pressure clathrate hydrate/membrane hybrid process for postcombustion capture of carbon dioxide.
    Environmental science & technology, 2008
    Co-Authors: Praveen Linga, Adebola Adeyemo, Peter Englezos
    Abstract:

    This study presents a medium-pressure CO2 capture process based on hydrate crystallization in the presence of tetrahydrofuran (THF). THF reduces the incipient equilibrium hydrate formation conditions from a CO2/N2 gas mixture. Relevant thermodynamic data at 0.5, 1.0, and 1.5 mol % THF were obtained and reported. In addition, the kinetics of hydrate formation from the CO2/N2/THF system as well as the CO2 recovery and separation efficiency were also determined experimentally at 273.75 K. The above data were utilized to develop the Block Flow Diagram of the proposed process. The process involves three hydrate stages coupled with a membrane-based gas separation process. The there hydrate stages operate at 2.5 MPa and 273.75 K. This operating pressure is substantially less than the pressure required in the absence of THF and hence the compression costs are reduced from 75 to 53% of the power produced for a typical 500 MW power plant.

Adebola Adeyemo - One of the best experts on this subject based on the ideXlab platform.

  • medium pressure clathrate hydrate membrane hybrid process for postcombustion capture of carbon dioxide
    Environmental Science & Technology, 2008
    Co-Authors: Praveen Linga, Adebola Adeyemo, Peter Englezos
    Abstract:

    This study presents a medium-pressure CO2 capture process based on hydrate crystallization in the presence of tetrahydrofuran (THF). THF reduces the incipient equilibrium hydrate formation conditions from a CO2/N2 gas mixture. Relevant thermodynamic data at 0.5, 1.0, and 1.5 mol % THF were obtained and reported. In addition, the kinetics of hydrate formation from the CO2/N2/THF system as well as the CO2 recovery and separation efficiency were also determined experimentally at 273.75 K. The above data were utilized to develop the Block Flow Diagram of the proposed process. The process involves three hydrate stages coupled with a membrane-based gas separation process. The there hydrate stages operate at 2.5 MPa and 273.75 K. This operating pressure is substantially less than the pressure required in the absence of THF and hence the compression costs are reduced from 75 to 53% of the power produced for a typical 500 MW power plant.

  • Medium-pressure clathrate hydrate/membrane hybrid process for postcombustion capture of carbon dioxide.
    Environmental science & technology, 2008
    Co-Authors: Praveen Linga, Adebola Adeyemo, Peter Englezos
    Abstract:

    This study presents a medium-pressure CO2 capture process based on hydrate crystallization in the presence of tetrahydrofuran (THF). THF reduces the incipient equilibrium hydrate formation conditions from a CO2/N2 gas mixture. Relevant thermodynamic data at 0.5, 1.0, and 1.5 mol % THF were obtained and reported. In addition, the kinetics of hydrate formation from the CO2/N2/THF system as well as the CO2 recovery and separation efficiency were also determined experimentally at 273.75 K. The above data were utilized to develop the Block Flow Diagram of the proposed process. The process involves three hydrate stages coupled with a membrane-based gas separation process. The there hydrate stages operate at 2.5 MPa and 273.75 K. This operating pressure is substantially less than the pressure required in the absence of THF and hence the compression costs are reduced from 75 to 53% of the power produced for a typical 500 MW power plant.

Takayuki Terai - One of the best experts on this subject based on the ideXlab platform.

  • Fundamental study on electrolyte recycle process by phosphates conversion technique
    2007
    Co-Authors: Ippei Amamoto, Munetaka Myochin, Hirohide Kofuji, Takayuki Terai
    Abstract:

    Fission product elements (FP) such as alkali metals, alkaline earth metals and rare-earth elements (REE) are apt to remain in the eutectic medium used in pyro-reprocessing even after treatment at the pyro-contactor step. It is desirable to have the spent electrolyte purified for recycling which in turn, could lead to the reduction of high-level radioactive wastes. This study is carried out to evaluate the feasibility of the electrolyte recycle process by the phosphates conversion technique. First of all, a reference Block Flow Diagram, which consists of three steps, i.e., 'Spent Electrolyte Regeneration Step', 'Phosphates Conversion Step', and 'Phosphates Immobilization Step', was designed based on known developmental results from literature. Subsequently, evaluation was undertaken by comparison with conventional relevant experimental and theoretical analysis results after gathering the essential basic data for thermodynamic calculation. The obtained computational value was then reflected to establish the preliminary conceptual Flow Diagram which would facilitate the next discussion and experiment for the realization of this process. (authors)

Maréchal François - One of the best experts on this subject based on the ideXlab platform.

  • Thermo-economic modeling of fuel decarbonization processes
    2010
    Co-Authors: Tock Laurence, Maréchal François
    Abstract:

    A systematic framework is developed for the thermo-environomic modeling, analysis and optimization of fuel decarbonization processes using precombustion routes to decarbonize the fuel by CO2 removal before burning the purified H2-rich gas in a gas turbine for power generation. For each process step, the different technological options are summarized in a process Block Flow Diagram. For the syngas synthesis coal and biomass gasification, steam and methane reforming, partial oxidation with pure oxygen or air, and autothermal reforming are considered. For the CO2 capture chemical absorption, adsorption and membrane processes are investigated. The different process options are analyzed and optimized with regard to energy efficiency, economic and environmental performances by applying a systematic methodology based on energy-Flow models, process integration techniques, and a multi-objective optimization procedure. The conceptual process design allows assessing the energetic, economic and environmental cost of carbon capture. The influence of process integration on the performance is highlighted based on the optimization of the polygeneration of heat, power and fuel