The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform

Yongchil Seo - One of the best experts on this subject based on the ideXlab platform.

  • oxidation reemission and mass distribution of mercury in bituminous coal fired power plants with scr cs esp and wet fgd
    Fuel, 2012
    Co-Authors: Deepak Pudasainee, Jeong Hun Kim, Youngsik Yoon, Yongchil Seo
    Abstract:

    Abstract Mercury (Hg) speciation variations in flue gas at the inlet and outlet of various air pollution control devices (APCDs) were studied, including a Selective Catalytic Reactor (SCR), a cold side-electrostatic precipitator (CS-ESP), a wet flue gas desulfurization system (wet FGD) and the stack of bituminous coal-fired power plants. Effects of flue gas temperature, flow rate and selected flue gas components on Hg oxidation were also studied. The association of selected parameters on Hg 0 oxidation and removal by the APCDs and the mass distribution of Hg within the system were estimated. Sampling and analysis were carried out using the Ontario Hydro Method. Solid and liquid samples were analyzed according to US EPA methods 7470A and 7471A, respectively. Hg concentration in the flue gas at the outlet boiler and stack ranged from 4.70 to 27.3 μg/Sm 3 and 3.1 to 0.48 μg/Sm 3 , respectively. The overall Hg removal efficiency in the APCDs ranged from 43.8% to 94.9%, and oxidized Hg in flue gas decreased with increasing temperature. With an increase in HCl concentration, a decrease in flue gas flow rate and decreasing temperature, oxidation of elemental Hg in combustion flue gas increased. The effects of SO x and NO x concentrations on elemental Hg oxidation in flue gas were rather complex. Among the parameters studied, the most significant parameters affecting overall Hg removal in the APCDs, in order, were removal in the ESP, oxidation in the SCR system and removal in the wet FGD. Experimental data and statistical analysis confirmed the promotion of a co-beneficial control of Hg in the SCR, CS-ESP and wet FGD configurations. The mass distribution showed that 43.0% of Hg was collected in ESP fly ash, 49.4% in wet FGD by-products and effluents, 3.9% of Hg was removed in boiler bottom ash and 3.7% was released into the atmosphere. In the SCR + CS-ESP + wet FGD configuration, a major portion of Hg was distributed into the by-products and removed by the APCDs compared to the lower removal levels seen in the CS-ESP + wet FGD configuration.

  • effect of Selective Catalytic Reactor on oxidation and enhanced removal of mercury in coal fired power plants
    Fuel, 2010
    Co-Authors: Deepak Pudasainee, Sung Jun Lee, Sang Hyeob Lee, Jeong Hun Kim, Ha Na Jang, Sung Jin Cho, Yongchil Seo
    Abstract:

    The present study investigated the variation of mercury (Hg) speciation within the air pollution control devices (APCDs) in bituminous coal-fired power plants. The effect of Selective Catalytic reduction (SCR) system, which is mainly installed for NOx removal, on elemental Hg (Hg0) oxidation and enhancement of Hg removal within APCDs, was studied. Hg speciations in flue gas at the inlet and outlet of each APCDs, such as SCR, cold-side electrostatic precipitator (CS-ESP) and flue gas desulphurization (FGD), were analyzed. Sampling and analysis were carried out according to Ontario Hydro Method (OHM). Overall Hg removal efficiency of APCDs, on average, was about 61% and 47% with and without SCR system, respectively. In the flue gas, Hg was mainly distributed in gaseous (elemental and oxidized) form. The oxidized to elemental Hg partitioning coefficient increased due to oxidation of Hg0 across the SCR system and decreased due to the removal of oxidized Hg (Hg2+) across a wet FGD system. Hg0 oxidation across the SCR system varied from 74% to 7% in tested coal-fired power plants. The comparative study shows that the installation of an SCR system increased Hg removal efficiency and suppressed the reemission of captured Hg0 within a wet FGD system.

  • mercury emission trend influenced by stringent air pollutants regulation for coal fired power plants in korea
    Atmospheric Environment, 2009
    Co-Authors: Deepak Pudasainee, Jeong Hun Kim, Yongchil Seo
    Abstract:

    Abstract Regulatory control of mercury emission from anthropogenic sources has become a global concern in the recent past. Coal-fired power plants are one of the largest sources of anthropogenic mercury emission into the atmosphere. This paper summarizes the current reducing trend of mercury emission as co-beneficial effect by more stringent regulation changes to control primary air pollutants with introducing test results from the commercial coal-fired facilities and suggesting a guideline for future regulatory development in Korea. On average, mercury emission concentrations ranged 16.3–2.7 μg Sm−3, 2.4–1.1 μg Sm−3, 3.1–0.7 μg Sm−3 from anthracite coal-fired power plants equipped with electrostatic precipitator (ESP), bituminous coal-fired power plants with ESP + flue gas desulphurization (FGD) and bituminous coal-fired power plants with Selective Catalytic Reactor (SCR) + cold side (CS) − ESP + wet FGD, respectively. Among the existing air pollution control devices, the best configuration for mercury removal in coal-fired power plants was SCR + CS − ESP + wet FGD, which were installed due to the stringent regulation changes to control primary air pollutants emission such as SO2, NOx and dust. It was estimated that uncontrolled and controlled mercury emission from coal-fired power plants as 10.3 ton yr−1 and 3.2 ton yr−1 respectively. After the installation of ESP, FGD and SCR system, following the enforcement of the stringent regulation, 7.1 ton yr−1 of mercury emission has been reduced (nearly 69%) from coal-fired power plants as a co-benefit control. Based on the overall study, a sample guideline including emission limits were suggested which will be applied to develop a countermeasure for controlling mercury emission from coal-fired power plants.

Deepak Pudasainee - One of the best experts on this subject based on the ideXlab platform.

  • oxidation reemission and mass distribution of mercury in bituminous coal fired power plants with scr cs esp and wet fgd
    Fuel, 2012
    Co-Authors: Deepak Pudasainee, Jeong Hun Kim, Youngsik Yoon, Yongchil Seo
    Abstract:

    Abstract Mercury (Hg) speciation variations in flue gas at the inlet and outlet of various air pollution control devices (APCDs) were studied, including a Selective Catalytic Reactor (SCR), a cold side-electrostatic precipitator (CS-ESP), a wet flue gas desulfurization system (wet FGD) and the stack of bituminous coal-fired power plants. Effects of flue gas temperature, flow rate and selected flue gas components on Hg oxidation were also studied. The association of selected parameters on Hg 0 oxidation and removal by the APCDs and the mass distribution of Hg within the system were estimated. Sampling and analysis were carried out using the Ontario Hydro Method. Solid and liquid samples were analyzed according to US EPA methods 7470A and 7471A, respectively. Hg concentration in the flue gas at the outlet boiler and stack ranged from 4.70 to 27.3 μg/Sm 3 and 3.1 to 0.48 μg/Sm 3 , respectively. The overall Hg removal efficiency in the APCDs ranged from 43.8% to 94.9%, and oxidized Hg in flue gas decreased with increasing temperature. With an increase in HCl concentration, a decrease in flue gas flow rate and decreasing temperature, oxidation of elemental Hg in combustion flue gas increased. The effects of SO x and NO x concentrations on elemental Hg oxidation in flue gas were rather complex. Among the parameters studied, the most significant parameters affecting overall Hg removal in the APCDs, in order, were removal in the ESP, oxidation in the SCR system and removal in the wet FGD. Experimental data and statistical analysis confirmed the promotion of a co-beneficial control of Hg in the SCR, CS-ESP and wet FGD configurations. The mass distribution showed that 43.0% of Hg was collected in ESP fly ash, 49.4% in wet FGD by-products and effluents, 3.9% of Hg was removed in boiler bottom ash and 3.7% was released into the atmosphere. In the SCR + CS-ESP + wet FGD configuration, a major portion of Hg was distributed into the by-products and removed by the APCDs compared to the lower removal levels seen in the CS-ESP + wet FGD configuration.

  • effect of Selective Catalytic Reactor on oxidation and enhanced removal of mercury in coal fired power plants
    Fuel, 2010
    Co-Authors: Deepak Pudasainee, Sung Jun Lee, Sang Hyeob Lee, Jeong Hun Kim, Ha Na Jang, Sung Jin Cho, Yongchil Seo
    Abstract:

    The present study investigated the variation of mercury (Hg) speciation within the air pollution control devices (APCDs) in bituminous coal-fired power plants. The effect of Selective Catalytic reduction (SCR) system, which is mainly installed for NOx removal, on elemental Hg (Hg0) oxidation and enhancement of Hg removal within APCDs, was studied. Hg speciations in flue gas at the inlet and outlet of each APCDs, such as SCR, cold-side electrostatic precipitator (CS-ESP) and flue gas desulphurization (FGD), were analyzed. Sampling and analysis were carried out according to Ontario Hydro Method (OHM). Overall Hg removal efficiency of APCDs, on average, was about 61% and 47% with and without SCR system, respectively. In the flue gas, Hg was mainly distributed in gaseous (elemental and oxidized) form. The oxidized to elemental Hg partitioning coefficient increased due to oxidation of Hg0 across the SCR system and decreased due to the removal of oxidized Hg (Hg2+) across a wet FGD system. Hg0 oxidation across the SCR system varied from 74% to 7% in tested coal-fired power plants. The comparative study shows that the installation of an SCR system increased Hg removal efficiency and suppressed the reemission of captured Hg0 within a wet FGD system.

  • mercury emission trend influenced by stringent air pollutants regulation for coal fired power plants in korea
    Atmospheric Environment, 2009
    Co-Authors: Deepak Pudasainee, Jeong Hun Kim, Yongchil Seo
    Abstract:

    Abstract Regulatory control of mercury emission from anthropogenic sources has become a global concern in the recent past. Coal-fired power plants are one of the largest sources of anthropogenic mercury emission into the atmosphere. This paper summarizes the current reducing trend of mercury emission as co-beneficial effect by more stringent regulation changes to control primary air pollutants with introducing test results from the commercial coal-fired facilities and suggesting a guideline for future regulatory development in Korea. On average, mercury emission concentrations ranged 16.3–2.7 μg Sm−3, 2.4–1.1 μg Sm−3, 3.1–0.7 μg Sm−3 from anthracite coal-fired power plants equipped with electrostatic precipitator (ESP), bituminous coal-fired power plants with ESP + flue gas desulphurization (FGD) and bituminous coal-fired power plants with Selective Catalytic Reactor (SCR) + cold side (CS) − ESP + wet FGD, respectively. Among the existing air pollution control devices, the best configuration for mercury removal in coal-fired power plants was SCR + CS − ESP + wet FGD, which were installed due to the stringent regulation changes to control primary air pollutants emission such as SO2, NOx and dust. It was estimated that uncontrolled and controlled mercury emission from coal-fired power plants as 10.3 ton yr−1 and 3.2 ton yr−1 respectively. After the installation of ESP, FGD and SCR system, following the enforcement of the stringent regulation, 7.1 ton yr−1 of mercury emission has been reduced (nearly 69%) from coal-fired power plants as a co-benefit control. Based on the overall study, a sample guideline including emission limits were suggested which will be applied to develop a countermeasure for controlling mercury emission from coal-fired power plants.

Jeong Hun Kim - One of the best experts on this subject based on the ideXlab platform.

  • oxidation reemission and mass distribution of mercury in bituminous coal fired power plants with scr cs esp and wet fgd
    Fuel, 2012
    Co-Authors: Deepak Pudasainee, Jeong Hun Kim, Youngsik Yoon, Yongchil Seo
    Abstract:

    Abstract Mercury (Hg) speciation variations in flue gas at the inlet and outlet of various air pollution control devices (APCDs) were studied, including a Selective Catalytic Reactor (SCR), a cold side-electrostatic precipitator (CS-ESP), a wet flue gas desulfurization system (wet FGD) and the stack of bituminous coal-fired power plants. Effects of flue gas temperature, flow rate and selected flue gas components on Hg oxidation were also studied. The association of selected parameters on Hg 0 oxidation and removal by the APCDs and the mass distribution of Hg within the system were estimated. Sampling and analysis were carried out using the Ontario Hydro Method. Solid and liquid samples were analyzed according to US EPA methods 7470A and 7471A, respectively. Hg concentration in the flue gas at the outlet boiler and stack ranged from 4.70 to 27.3 μg/Sm 3 and 3.1 to 0.48 μg/Sm 3 , respectively. The overall Hg removal efficiency in the APCDs ranged from 43.8% to 94.9%, and oxidized Hg in flue gas decreased with increasing temperature. With an increase in HCl concentration, a decrease in flue gas flow rate and decreasing temperature, oxidation of elemental Hg in combustion flue gas increased. The effects of SO x and NO x concentrations on elemental Hg oxidation in flue gas were rather complex. Among the parameters studied, the most significant parameters affecting overall Hg removal in the APCDs, in order, were removal in the ESP, oxidation in the SCR system and removal in the wet FGD. Experimental data and statistical analysis confirmed the promotion of a co-beneficial control of Hg in the SCR, CS-ESP and wet FGD configurations. The mass distribution showed that 43.0% of Hg was collected in ESP fly ash, 49.4% in wet FGD by-products and effluents, 3.9% of Hg was removed in boiler bottom ash and 3.7% was released into the atmosphere. In the SCR + CS-ESP + wet FGD configuration, a major portion of Hg was distributed into the by-products and removed by the APCDs compared to the lower removal levels seen in the CS-ESP + wet FGD configuration.

  • effect of Selective Catalytic Reactor on oxidation and enhanced removal of mercury in coal fired power plants
    Fuel, 2010
    Co-Authors: Deepak Pudasainee, Sung Jun Lee, Sang Hyeob Lee, Jeong Hun Kim, Ha Na Jang, Sung Jin Cho, Yongchil Seo
    Abstract:

    The present study investigated the variation of mercury (Hg) speciation within the air pollution control devices (APCDs) in bituminous coal-fired power plants. The effect of Selective Catalytic reduction (SCR) system, which is mainly installed for NOx removal, on elemental Hg (Hg0) oxidation and enhancement of Hg removal within APCDs, was studied. Hg speciations in flue gas at the inlet and outlet of each APCDs, such as SCR, cold-side electrostatic precipitator (CS-ESP) and flue gas desulphurization (FGD), were analyzed. Sampling and analysis were carried out according to Ontario Hydro Method (OHM). Overall Hg removal efficiency of APCDs, on average, was about 61% and 47% with and without SCR system, respectively. In the flue gas, Hg was mainly distributed in gaseous (elemental and oxidized) form. The oxidized to elemental Hg partitioning coefficient increased due to oxidation of Hg0 across the SCR system and decreased due to the removal of oxidized Hg (Hg2+) across a wet FGD system. Hg0 oxidation across the SCR system varied from 74% to 7% in tested coal-fired power plants. The comparative study shows that the installation of an SCR system increased Hg removal efficiency and suppressed the reemission of captured Hg0 within a wet FGD system.

  • mercury emission trend influenced by stringent air pollutants regulation for coal fired power plants in korea
    Atmospheric Environment, 2009
    Co-Authors: Deepak Pudasainee, Jeong Hun Kim, Yongchil Seo
    Abstract:

    Abstract Regulatory control of mercury emission from anthropogenic sources has become a global concern in the recent past. Coal-fired power plants are one of the largest sources of anthropogenic mercury emission into the atmosphere. This paper summarizes the current reducing trend of mercury emission as co-beneficial effect by more stringent regulation changes to control primary air pollutants with introducing test results from the commercial coal-fired facilities and suggesting a guideline for future regulatory development in Korea. On average, mercury emission concentrations ranged 16.3–2.7 μg Sm−3, 2.4–1.1 μg Sm−3, 3.1–0.7 μg Sm−3 from anthracite coal-fired power plants equipped with electrostatic precipitator (ESP), bituminous coal-fired power plants with ESP + flue gas desulphurization (FGD) and bituminous coal-fired power plants with Selective Catalytic Reactor (SCR) + cold side (CS) − ESP + wet FGD, respectively. Among the existing air pollution control devices, the best configuration for mercury removal in coal-fired power plants was SCR + CS − ESP + wet FGD, which were installed due to the stringent regulation changes to control primary air pollutants emission such as SO2, NOx and dust. It was estimated that uncontrolled and controlled mercury emission from coal-fired power plants as 10.3 ton yr−1 and 3.2 ton yr−1 respectively. After the installation of ESP, FGD and SCR system, following the enforcement of the stringent regulation, 7.1 ton yr−1 of mercury emission has been reduced (nearly 69%) from coal-fired power plants as a co-benefit control. Based on the overall study, a sample guideline including emission limits were suggested which will be applied to develop a countermeasure for controlling mercury emission from coal-fired power plants.

Mauro Reini - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of gas turbines as alternative energy production systems for a large cruise ship to meet new maritime regulations
    Applied Energy, 2018
    Co-Authors: Alessandro Armellini, S Daniotti, Piero Pinamonti, Mauro Reini
    Abstract:

    Abstract As a consequence of the new and up-coming regulations imposed by the International Maritime Organization (IMO), polluting emissions produced by large ships are now under strict control. Moreover, specific areas called “Emission Controlled Area” (ECA), which request even lower pollutant emissions, will be extended. To face up to this issue, ships propelled by Internal Combustion Engines (ICEs) burning Heavy Fuel Oil (HFO) can be equipped with abatement devices such as scrubbers and Selective Catalytic Reactor systems. Along with these solutions, which seem to be the route ship-owners will prefer, other methods can be considered, such as the use of Marine Gas Oil (MGO): a more expensive fuel, but with lower sulphur content. The use of MGO allows users to consider a further and more drastic modification of the power system, namely the use of Gas Turbines (GTs) in place of ICEs. GTs, despite being less efficient, are much lighter, more compact, and can more easily reach low NOx emissions than ICEs. Even if these aspects are theoretically well known, there are still difficulties in finding studies reporting quantitative analysis (weight, dimensions, fuel consumption) that compare GT and ICE power systems employed on board. The present paper aims to provide these data by analyzing different solutions applied to a real case. Unlike other studies, the work is focused on a cruise ship rather than on a cargo ship, because a cruise ship’s operation profile is more variable during the trip.

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

  • supervisory control of a Selective Catalytic Reactor for nox removal in incineration plants
    Waste Management, 1998
    Co-Authors: M Rovaglio, Davide Manca, F Rusconi
    Abstract:

    The purpose of this work is to present an industrial application of an optimization tool for the supervisory control of the NO{sub x} reduction section. This work does not pretend to address any new technique of NO{sub x} reduction but rather to show the results obtained when a comprehensive on-line optimization tool has been successfully applied. The optimization procedure consists of the search of the best working conditions that satisfy the operating and legal constraints, in terms of emission amounts and combustion quality. This procedure adopts a simulation algorithm and data reconciliation tool to verify and improve the consistency of the calculated values by experimental data. Using such algorithm it is possible to identify all the updated data necessary to optimize the plant`s performance. Specifically, the DeNO{sub x} section optimization, both from an economical and environmental point of view, is strongly related to the estimation of the nitrogen waste mass fraction together with the Catalytic Reactor efficiency. The results obtained in many case studies show that it is possible to achieve the desired performance and to reduce the operating costs by defining the optimal operating temperature and the corresponding amount of ammonia required for the Catalytic reduction of NO{sub x}more » subject to the emission limits. These tools were successfully tested on a municipal waste incineration plant.« less