The Experts below are selected from a list of 87 Experts worldwide ranked by ideXlab platform
Stefano Brandani - One of the best experts on this subject based on the ideXlab platform.
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Process simulation of a dual stage Selexol Process for 95 carbon capture efficiency at an integrated gasification combined cycle power plant
International Journal of Greenhouse Gas Control, 2015Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:a b s t r a c t It was aimed to simulate a conventional dual-stage Selexol Process for removing CO2 and H2S simultaneously from a synthesis gas (syngas) originated from a typical Integrated Gasification Combined Cycle (IGCC) power plant driven by a dry-coal fed gasifier using Honeywell UniSim R400. The solubilities of syngas components on Selexol were predicted by temperature-dependant Henry’s law constants being newly evaluated in this study based on the experimental data in Xu et al. (1992). The operating conditions of the dual-stage Selexol unit were determined so as to meet simultaneously various performance targets, such as 99+% H2 recovery, 90% CO2 recovery, 99+% H2S recovery, and less than 20 ppm H2S in CO2 product. By and large the resulting energy consumptions of the Selexol Process were in good agreement with those reported in DOE NETL (2010) that this study was based on. It was shown that the integrated dual-stage Selexol unit could achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions. By contrast a CO2 removal Selexol Process having not an input of lean solvent generated by thermal regeneration could not achieve 95% carbon capture rate due to a pinch point formed at the top of the CO2 absorber.
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Process simulation of a dual-stage Selexol Process for 95% carbon capture efficiency at an integrated gasification combined cycle power plant
International Journal of Greenhouse Gas Control, 2015Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:a b s t r a c t It was aimed to simulate a conventional dual-stage Selexol Process for removing CO2 and H2S simultaneously from a synthesis gas (syngas) originated from a typical Integrated Gasification Combined Cycle (IGCC) power plant driven by a dry-coal fed gasifier using Honeywell UniSim R400. The solubilities of syngas components on Selexol were predicted by temperature-dependant Henry’s law constants being newly evaluated in this study based on the experimental data in Xu et al. (1992). The operating conditions of the dual-stage Selexol unit were determined so as to meet simultaneously various performance targets, such as 99+% H2 recovery, 90% CO2 recovery, 99+% H2S recovery, and less than 20 ppm H2S in CO2 product. By and large the resulting energy consumptions of the Selexol Process were in good agreement with those reported in DOE NETL (2010) that this study was based on. It was shown that the integrated dual-stage Selexol unit could achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions. By contrast a CO2 removal Selexol Process having not an input of lean solvent generated by thermal regeneration could not achieve 95% carbon capture rate due to a pinch point formed at the top of the CO2 absorber.
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Process simulation of a dual stage Selexol unit for pre combustion carbon capture at an igcc power plant
Energy Procedia, 2014Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:It is aimed to simulate a dual-stage Selexol Process for removing CO2 as well as H2S from the syngas typically found in the IGCC power plant with a dry-coal fed gasifier. Temperature-dependent Henry’s law is employed in the Process simulation to estimate the solubilities of gas components in Selexol. The operating conditions of dual-stage Selexol unit were found so as to meet simultaneously various specifications such as 99+% H2 recovery, 90% or 95% CO2 recovery and 99+% H2S recovery. The power consumptions for auxiliary units and CO2 compression estimated by the simulation are in good agreement with those reported in the literature [1]. It is shown that the conventional, integrated dual-stage Selexol unit can achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions.
Zoe Kapetaki - One of the best experts on this subject based on the ideXlab platform.
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Process simulation of a dual stage Selexol Process for 95 carbon capture efficiency at an integrated gasification combined cycle power plant
International Journal of Greenhouse Gas Control, 2015Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:a b s t r a c t It was aimed to simulate a conventional dual-stage Selexol Process for removing CO2 and H2S simultaneously from a synthesis gas (syngas) originated from a typical Integrated Gasification Combined Cycle (IGCC) power plant driven by a dry-coal fed gasifier using Honeywell UniSim R400. The solubilities of syngas components on Selexol were predicted by temperature-dependant Henry’s law constants being newly evaluated in this study based on the experimental data in Xu et al. (1992). The operating conditions of the dual-stage Selexol unit were determined so as to meet simultaneously various performance targets, such as 99+% H2 recovery, 90% CO2 recovery, 99+% H2S recovery, and less than 20 ppm H2S in CO2 product. By and large the resulting energy consumptions of the Selexol Process were in good agreement with those reported in DOE NETL (2010) that this study was based on. It was shown that the integrated dual-stage Selexol unit could achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions. By contrast a CO2 removal Selexol Process having not an input of lean solvent generated by thermal regeneration could not achieve 95% carbon capture rate due to a pinch point formed at the top of the CO2 absorber.
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Process simulation of a dual-stage Selexol Process for 95% carbon capture efficiency at an integrated gasification combined cycle power plant
International Journal of Greenhouse Gas Control, 2015Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:a b s t r a c t It was aimed to simulate a conventional dual-stage Selexol Process for removing CO2 and H2S simultaneously from a synthesis gas (syngas) originated from a typical Integrated Gasification Combined Cycle (IGCC) power plant driven by a dry-coal fed gasifier using Honeywell UniSim R400. The solubilities of syngas components on Selexol were predicted by temperature-dependant Henry’s law constants being newly evaluated in this study based on the experimental data in Xu et al. (1992). The operating conditions of the dual-stage Selexol unit were determined so as to meet simultaneously various performance targets, such as 99+% H2 recovery, 90% CO2 recovery, 99+% H2S recovery, and less than 20 ppm H2S in CO2 product. By and large the resulting energy consumptions of the Selexol Process were in good agreement with those reported in DOE NETL (2010) that this study was based on. It was shown that the integrated dual-stage Selexol unit could achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions. By contrast a CO2 removal Selexol Process having not an input of lean solvent generated by thermal regeneration could not achieve 95% carbon capture rate due to a pinch point formed at the top of the CO2 absorber.
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Process simulation of a dual stage Selexol unit for pre combustion carbon capture at an igcc power plant
Energy Procedia, 2014Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:It is aimed to simulate a dual-stage Selexol Process for removing CO2 as well as H2S from the syngas typically found in the IGCC power plant with a dry-coal fed gasifier. Temperature-dependent Henry’s law is employed in the Process simulation to estimate the solubilities of gas components in Selexol. The operating conditions of dual-stage Selexol unit were found so as to meet simultaneously various specifications such as 99+% H2 recovery, 90% or 95% CO2 recovery and 99+% H2S recovery. The power consumptions for auxiliary units and CO2 compression estimated by the simulation are in good agreement with those reported in the literature [1]. It is shown that the conventional, integrated dual-stage Selexol unit can achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions.
Pietro Brandani - One of the best experts on this subject based on the ideXlab platform.
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Process simulation of a dual stage Selexol Process for 95 carbon capture efficiency at an integrated gasification combined cycle power plant
International Journal of Greenhouse Gas Control, 2015Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:a b s t r a c t It was aimed to simulate a conventional dual-stage Selexol Process for removing CO2 and H2S simultaneously from a synthesis gas (syngas) originated from a typical Integrated Gasification Combined Cycle (IGCC) power plant driven by a dry-coal fed gasifier using Honeywell UniSim R400. The solubilities of syngas components on Selexol were predicted by temperature-dependant Henry’s law constants being newly evaluated in this study based on the experimental data in Xu et al. (1992). The operating conditions of the dual-stage Selexol unit were determined so as to meet simultaneously various performance targets, such as 99+% H2 recovery, 90% CO2 recovery, 99+% H2S recovery, and less than 20 ppm H2S in CO2 product. By and large the resulting energy consumptions of the Selexol Process were in good agreement with those reported in DOE NETL (2010) that this study was based on. It was shown that the integrated dual-stage Selexol unit could achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions. By contrast a CO2 removal Selexol Process having not an input of lean solvent generated by thermal regeneration could not achieve 95% carbon capture rate due to a pinch point formed at the top of the CO2 absorber.
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Process simulation of a dual-stage Selexol Process for 95% carbon capture efficiency at an integrated gasification combined cycle power plant
International Journal of Greenhouse Gas Control, 2015Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:a b s t r a c t It was aimed to simulate a conventional dual-stage Selexol Process for removing CO2 and H2S simultaneously from a synthesis gas (syngas) originated from a typical Integrated Gasification Combined Cycle (IGCC) power plant driven by a dry-coal fed gasifier using Honeywell UniSim R400. The solubilities of syngas components on Selexol were predicted by temperature-dependant Henry’s law constants being newly evaluated in this study based on the experimental data in Xu et al. (1992). The operating conditions of the dual-stage Selexol unit were determined so as to meet simultaneously various performance targets, such as 99+% H2 recovery, 90% CO2 recovery, 99+% H2S recovery, and less than 20 ppm H2S in CO2 product. By and large the resulting energy consumptions of the Selexol Process were in good agreement with those reported in DOE NETL (2010) that this study was based on. It was shown that the integrated dual-stage Selexol unit could achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions. By contrast a CO2 removal Selexol Process having not an input of lean solvent generated by thermal regeneration could not achieve 95% carbon capture rate due to a pinch point formed at the top of the CO2 absorber.
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Process simulation of a dual stage Selexol unit for pre combustion carbon capture at an igcc power plant
Energy Procedia, 2014Co-Authors: Zoe Kapetaki, Pietro Brandani, Stefano BrandaniAbstract:It is aimed to simulate a dual-stage Selexol Process for removing CO2 as well as H2S from the syngas typically found in the IGCC power plant with a dry-coal fed gasifier. Temperature-dependent Henry’s law is employed in the Process simulation to estimate the solubilities of gas components in Selexol. The operating conditions of dual-stage Selexol unit were found so as to meet simultaneously various specifications such as 99+% H2 recovery, 90% or 95% CO2 recovery and 99+% H2S recovery. The power consumptions for auxiliary units and CO2 compression estimated by the simulation are in good agreement with those reported in the literature [1]. It is shown that the conventional, integrated dual-stage Selexol unit can achieve 95% carbon capture rate as well as 90% by simply changing the operating conditions.
Dasom Im - One of the best experts on this subject based on the ideXlab platform.
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economic assessment and optimization of the Selexol Process with novel additives
International Journal of Greenhouse Gas Control, 2015Co-Authors: Dasom ImAbstract:Abstract Despite the rising concern with climate change, carbon capture is yet to be implemented widely in industry due to its high cost. In this study, three candidate compounds, dimethyl carbonate (DMC), diethyl carbonate (DEC), and triacetin (TAT), are considered as additives for the solvent, Dimethyl Ethers of Polyethylene Glycol (DEPG), to improve the economics of the Selexol Process. To discuss their economic feasibility, the 1-stage Selexol Process employing each solvent additive is developed, and their operating and equipment costs are compared with those of the reference Process (without the additive). The Process employing the TAT additive is shown to be competitive with the reference Process in terms of both operating and equipment costs, but DMC and DEC showed a serious problem in terms of solvent loss. For reducing the operating cost and CO2 capture cost further, the lean solvent temperature of the Selexol Process with the TAT solvent additive is optimized at various CO2 capture rates.
Eric Liese - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Preanode and Postanode Carbon Dioxide Separation for IGFC Systems
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2010Co-Authors: Eric LieseAbstract:This paper examines the arrangement of a solid oxide fuel cell (SOFC) within a coal gasification cycle, this combination generally being called an integrated gasification fuel cell cycle. This work relies on a previous study performed by the National Energy Technology Laboratory (NETL) that details thermodynamic simulations of integrated gasification combined cycle (IGCC) systems and considers various gasifier types and includes cases for 90% CO2 capture (2007, “Cost and Performance Baseline for Fossil Energy Plants, Vol. 1: Bituminous Coal and Natural Gas to Electricity,” National Energy Technology Laboratory Report No. DOE/NETL-2007/1281). All systems in this study assume a Conoco Philips gasifier and cold-gas clean up conditions for the coal gasification system (Cases 3 and 4 in the NETL IGCC report). Four system arrangements, cases, are examined. Cases 1 and 2 remove the CO2 after the SOFC anode. Case 3 assumes steam addition, a water-gas-shift (WGS) catalyst, and a Selexol Process to remove the CO2 in the gas cleanup section, sending a hydrogen-rich gas to the fuel cell anode. Case 4 assumes Selexol in the cold-gas cleanup section as in Case 3; however, there is no steam addition, and the WGS takes places in the SOFC and after the anode. Results demonstrate more » significant efficiency advantages compared with IGCC with CO2 capture. The hydrogen-rich case (Case 3) has better net electric efficiency compared with typical postanode CO2 capture cases (Cases 1 and 2), with a simpler arrangement but at a lower SOFC power density, or a lower efficiency at the same power density. Case 4 gives an efficiency similar to Case 3 but also at a lower SOFC power density. Carbon deposition concerns are also discussed « less
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Comparison of Pre-Anode and Post-Anode Carbon Dioxide Separation for IGFC Systems
Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine, 2009Co-Authors: Eric LieseAbstract:This paper examines the arrangement of a solid oxide fuel cell (SOFC) within a coal gasification cycle, this combination generally being called an integrated gasification fuel cell cycle (IGFC). This work relies on a previous study performed by the National Energy Technology Laboratory (NETL) that details thermodynamic simulations of IGCC systems and considers various gasifier types and includes cases for 90% CO2 capture [1]. All systems in this study assume a Conoco Philips gasifier and cold gas clean up conditions for the coal gasification system (Cases 3 and 4 in the NETL IGCC report). Four system arrangements, cases, are examined. Cases 1 and 2 remove the CO2 after the SOFC anode. Case 3 assumes steam addition, a water-gas-shift (WGS) catalyst and a Selexol Process to remove the CO2 in the gas cleanup section, sending a hydrogen-rich gas to the fuel cell anode. Case 4 assumes Selexol in the cold-gas cleanup section as in Case 3; however, there is no steam addition and the WGS takes places in the SOFC, and after the anode. Results demonstrate significant efficiency advantages compared to IGCC with CO2 capture. The hydrogen-rich case (Case 3) has better net electric efficiency compared to typical post-anode CO2 capture cases (Cases 1 and 2), with a simpler arrangement and similar SOFC area. Case 4 gives an efficiency similar to Case 3, but at a lower SOFC power density, or a lower efficiency at the same power density. Carbon deposition concerns are also discussed.