The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform

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

  • sulfur retention in an oxy fuel bubbling fluidized bed combustor effect of Coal Rank type of sorbent and o 2 co 2 ratio
    Fuel, 2014
    Co-Authors: M De Las Obrasloscertales, F Garcialabiano, P Gayan, L F De Diego, A Rufas, A Abad, Juan Adanez
    Abstract:

    Abstract In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling fluidized bed combustor (∼3 kW th ) operating in oxy-fuel combustion mode is analyzed. Tests were performed at different operating temperatures with three sorbents, two limestones and one dolomite, and with three Coals, ranging from lignite to anthracite, to analyze the influence of Coal Rank, type of sorbent, sorbent particle size, and O 2 /CO 2 feeding ratio on the sulfation process. It was found that the combustor temperature had a strong influence on the limestones sulfur retention with a maximum at 900–925 °C. The behavior of the limestones was qualitatively similar with the three Coals, attaining the highest sulfur retention values working with the lignite and the lowest working with the bituminous Coal. On the contrary, with the dolomite the sulfur retention was hardly affected by the combustion temperature and the sulfur retentions attained were higher than with the limestones. The sulfur retention increased with diminishing the Ca-based sorbent particle size, and it was hardly affected by the O 2 /CO 2 ratio fed into the combustor.

  • Sulfur retention in an oxy-fuel bubbling fluidized bed combustor: Effect of Coal Rank, type of sorbent and O 2 /CO 2 ratio
    Fuel, 2014
    Co-Authors: M. De Las Obras-loscertales, L F De Diego, A Rufas, A Abad, Francisco García-labiano, Pilar Gayán, Juan Adanez
    Abstract:

    Abstract In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling fluidized bed combustor (∼3 kW th ) operating in oxy-fuel combustion mode is analyzed. Tests were performed at different operating temperatures with three sorbents, two limestones and one dolomite, and with three Coals, ranging from lignite to anthracite, to analyze the influence of Coal Rank, type of sorbent, sorbent particle size, and O 2 /CO 2 feeding ratio on the sulfation process. It was found that the combustor temperature had a strong influence on the limestones sulfur retention with a maximum at 900–925 °C. The behavior of the limestones was qualitatively similar with the three Coals, attaining the highest sulfur retention values working with the lignite and the lowest working with the bituminous Coal. On the contrary, with the dolomite the sulfur retention was hardly affected by the combustion temperature and the sulfur retentions attained were higher than with the limestones. The sulfur retention increased with diminishing the Ca-based sorbent particle size, and it was hardly affected by the O 2 /CO 2 ratio fed into the combustor.

  • relevance of the Coal Rank on the performance of the in situ gasification chemical looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, F Garcialabiano, P Gayan, L F De Diego, Juan Adanez
    Abstract:

    In this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e., H2O. This process has been referred as in situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite and the effect of the Coal Rank on the process performance was evaluated. The carbon capture efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.

  • Relevance of the Coal Rank on the performance of the in situ gasification chemical-looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, P Gayan, L F De Diego, F. García-labiano, Juan Adanez
    Abstract:

    12 páginas, figurasIn this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e, H2O. This process has been referred as in-situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite\ud and the effect of the Coal Rank on the process performance was evaluated. The carbon capture\ud efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high\ud carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it\ud was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.This work was partially supported by the Spanish Ministry of Science and Innovation (Project\ud ENE2010-19550). A. Cuadrat thanks CSIC for the JAE Predoc. fellowship belonging to the\ud “Junta para la Ampliación de Estudios” Program and partially supported by the European\ud Social Fund.Peer reviewe

L F De Diego - One of the best experts on this subject based on the ideXlab platform.

  • sulfur retention in an oxy fuel bubbling fluidized bed combustor effect of Coal Rank type of sorbent and o 2 co 2 ratio
    Fuel, 2014
    Co-Authors: M De Las Obrasloscertales, F Garcialabiano, P Gayan, L F De Diego, A Rufas, A Abad, Juan Adanez
    Abstract:

    Abstract In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling fluidized bed combustor (∼3 kW th ) operating in oxy-fuel combustion mode is analyzed. Tests were performed at different operating temperatures with three sorbents, two limestones and one dolomite, and with three Coals, ranging from lignite to anthracite, to analyze the influence of Coal Rank, type of sorbent, sorbent particle size, and O 2 /CO 2 feeding ratio on the sulfation process. It was found that the combustor temperature had a strong influence on the limestones sulfur retention with a maximum at 900–925 °C. The behavior of the limestones was qualitatively similar with the three Coals, attaining the highest sulfur retention values working with the lignite and the lowest working with the bituminous Coal. On the contrary, with the dolomite the sulfur retention was hardly affected by the combustion temperature and the sulfur retentions attained were higher than with the limestones. The sulfur retention increased with diminishing the Ca-based sorbent particle size, and it was hardly affected by the O 2 /CO 2 ratio fed into the combustor.

  • Sulfur retention in an oxy-fuel bubbling fluidized bed combustor: Effect of Coal Rank, type of sorbent and O 2 /CO 2 ratio
    Fuel, 2014
    Co-Authors: M. De Las Obras-loscertales, L F De Diego, A Rufas, A Abad, Francisco García-labiano, Pilar Gayán, Juan Adanez
    Abstract:

    Abstract In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling fluidized bed combustor (∼3 kW th ) operating in oxy-fuel combustion mode is analyzed. Tests were performed at different operating temperatures with three sorbents, two limestones and one dolomite, and with three Coals, ranging from lignite to anthracite, to analyze the influence of Coal Rank, type of sorbent, sorbent particle size, and O 2 /CO 2 feeding ratio on the sulfation process. It was found that the combustor temperature had a strong influence on the limestones sulfur retention with a maximum at 900–925 °C. The behavior of the limestones was qualitatively similar with the three Coals, attaining the highest sulfur retention values working with the lignite and the lowest working with the bituminous Coal. On the contrary, with the dolomite the sulfur retention was hardly affected by the combustion temperature and the sulfur retentions attained were higher than with the limestones. The sulfur retention increased with diminishing the Ca-based sorbent particle size, and it was hardly affected by the O 2 /CO 2 ratio fed into the combustor.

  • relevance of the Coal Rank on the performance of the in situ gasification chemical looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, F Garcialabiano, P Gayan, L F De Diego, Juan Adanez
    Abstract:

    In this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e., H2O. This process has been referred as in situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite and the effect of the Coal Rank on the process performance was evaluated. The carbon capture efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.

  • Relevance of the Coal Rank on the performance of the in situ gasification chemical-looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, P Gayan, L F De Diego, F. García-labiano, Juan Adanez
    Abstract:

    12 páginas, figurasIn this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e, H2O. This process has been referred as in-situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite\ud and the effect of the Coal Rank on the process performance was evaluated. The carbon capture\ud efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high\ud carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it\ud was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.This work was partially supported by the Spanish Ministry of Science and Innovation (Project\ud ENE2010-19550). A. Cuadrat thanks CSIC for the JAE Predoc. fellowship belonging to the\ud “Junta para la Ampliación de Estudios” Program and partially supported by the European\ud Social Fund.Peer reviewe

P Gayan - One of the best experts on this subject based on the ideXlab platform.

  • sulfur retention in an oxy fuel bubbling fluidized bed combustor effect of Coal Rank type of sorbent and o 2 co 2 ratio
    Fuel, 2014
    Co-Authors: M De Las Obrasloscertales, F Garcialabiano, P Gayan, L F De Diego, A Rufas, A Abad, Juan Adanez
    Abstract:

    Abstract In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling fluidized bed combustor (∼3 kW th ) operating in oxy-fuel combustion mode is analyzed. Tests were performed at different operating temperatures with three sorbents, two limestones and one dolomite, and with three Coals, ranging from lignite to anthracite, to analyze the influence of Coal Rank, type of sorbent, sorbent particle size, and O 2 /CO 2 feeding ratio on the sulfation process. It was found that the combustor temperature had a strong influence on the limestones sulfur retention with a maximum at 900–925 °C. The behavior of the limestones was qualitatively similar with the three Coals, attaining the highest sulfur retention values working with the lignite and the lowest working with the bituminous Coal. On the contrary, with the dolomite the sulfur retention was hardly affected by the combustion temperature and the sulfur retentions attained were higher than with the limestones. The sulfur retention increased with diminishing the Ca-based sorbent particle size, and it was hardly affected by the O 2 /CO 2 ratio fed into the combustor.

  • relevance of the Coal Rank on the performance of the in situ gasification chemical looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, F Garcialabiano, P Gayan, L F De Diego, Juan Adanez
    Abstract:

    In this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e., H2O. This process has been referred as in situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite and the effect of the Coal Rank on the process performance was evaluated. The carbon capture efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.

  • Relevance of the Coal Rank on the performance of the in situ gasification chemical-looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, P Gayan, L F De Diego, F. García-labiano, Juan Adanez
    Abstract:

    12 páginas, figurasIn this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e, H2O. This process has been referred as in-situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite\ud and the effect of the Coal Rank on the process performance was evaluated. The carbon capture\ud efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high\ud carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it\ud was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.This work was partially supported by the Spanish Ministry of Science and Innovation (Project\ud ENE2010-19550). A. Cuadrat thanks CSIC for the JAE Predoc. fellowship belonging to the\ud “Junta para la Ampliación de Estudios” Program and partially supported by the European\ud Social Fund.Peer reviewe

Ahmed F Ghoniem - One of the best experts on this subject based on the ideXlab platform.

  • performance of an igcc plant with carbon capture and Coal co2 slurry feed impact of Coal Rank slurry loading and syngas cooling technology
    Industrial & Engineering Chemistry Research, 2012
    Co-Authors: Cristina Botero, Randall P Field, Robert Brasington, Howard J Herzog, Ahmed F Ghoniem
    Abstract:

    The high heat capacity and latent enthalpy of vaporization of water lead to a low gasification efficiency in gasifiers fed with Coal-water slurry. Liquid carbon dioxide, CO2(l), has been suggested as an alternative slurrying medium to improve the efficiency of low-Rank Coal gasification in integrated gasification combined cycle power plants with carbon capture. Steady-state process simulation is used in this work to confirm published findings and present a comprehensive assessment of the impact of the Coal Rank, gasifier cooling technology, and CO2 slurry loading uncertainty on the performance advantage of CO2 slurry-fed plants. A power generation efficiency improvement of up to 25% (5%-points) is predicted, which is shown to increase with decreasing Coal Rank and to be highest for full-quench gasifier cooling technology; the latter is a significant source of capital cost savings and is especially attractive when combined with CO2 slurry feed. Using CO2(l) instead of water slurry reduces the performance p...

  • performance of an igcc plant with carbon capture and Coal co2 slurry feed impact of Coal Rank slurry loading and syngas cooling technology
    Industrial & Engineering Chemistry Research, 2012
    Co-Authors: Cristina Botero, Randall P Field, Robert Brasington, Howard J Herzog, Ahmed F Ghoniem
    Abstract:

    The high heat capacity and latent enthalpy of vaporization of water lead to a low gasification efficiency in gasifiers fed with Coal-water slurry. Liquid carbon dioxide, CO 2(1) , has been suggested as an alternative slurrying medium to improve the efficiency of low-Rank Coal gasification in integrated gasification combined cycle power plants with carbon capture. Steady-state process simulation is used in this work to confirm published findings and present a comprehensive assessment of the impact of the Coal Rank, gasifier cooling technology, and CO 2 slurry loading uncertainty on the performance advantage of CO 2 slurry-fed plants. A power generation efficiency improvement of up to 25% (5%-points) is predicted, which is shown to increase with decreasing Coal Rank and to be highest for full-quench gasifier cooling technology; the latter is a significant source of capital cost savings and is especially attractive when combined with CO 2 slurry feed. Using CO 2(1) instead of water slurry reduces the performance penalty of low-Rank Coal gasification by half, thus substantially improving the feedstock flexibility of the plant. With a single exception, the performance benefit of Coal-CO 2 slurry was found to be outside the uncertainty range of the slurry loading, which is still one of the key unknowns of this alternative feed system.

Ana Cuadrat - One of the best experts on this subject based on the ideXlab platform.

  • relevance of the Coal Rank on the performance of the in situ gasification chemical looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, F Garcialabiano, P Gayan, L F De Diego, Juan Adanez
    Abstract:

    In this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e., H2O. This process has been referred as in situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite and the effect of the Coal Rank on the process performance was evaluated. The carbon capture efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.

  • Relevance of the Coal Rank on the performance of the in situ gasification chemical-looping combustion
    Chemical Engineering Journal, 2012
    Co-Authors: Ana Cuadrat, Alberto Abad, P Gayan, L F De Diego, F. García-labiano, Juan Adanez
    Abstract:

    12 páginas, figurasIn this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e, H2O. This process has been referred as in-situ gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite\ud and the effect of the Coal Rank on the process performance was evaluated. The carbon capture\ud efficiency followed the trend of the Coal Rank, as it was higher for lignite, then for the bituminous Coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high\ud carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H2O:CO2 mixtures as gasification agent with each type of fuel was also assessed and it\ud was seen that in case of bituminous Coals and lignite some of H2O can be replaced by CO2.This work was partially supported by the Spanish Ministry of Science and Innovation (Project\ud ENE2010-19550). A. Cuadrat thanks CSIC for the JAE Predoc. fellowship belonging to the\ud “Junta para la Ampliación de Estudios” Program and partially supported by the European\ud Social Fund.Peer reviewe