The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
Qingya Liu - One of the best experts on this subject based on the ideXlab platform.
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kcl induced deactivation of v2o5 wo3 tio2 catalyst during selective catalytic reduction of no by nh3 comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
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KCl-induced deactivation of V2O5–WO3/TiO2 catalyst during selective catalytic reduction of NO by NH3: Comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
Tingyu Lei - One of the best experts on this subject based on the ideXlab platform.
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kcl induced deactivation of v2o5 wo3 tio2 catalyst during selective catalytic reduction of no by nh3 comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
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KCl-induced deactivation of V2O5–WO3/TiO2 catalyst during selective catalytic reduction of NO by NH3: Comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
Shuanbing Zhang - One of the best experts on this subject based on the ideXlab platform.
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a study on the apparent kinetics of h2s removal using a zno mno desulfurizer
Industrial & Engineering Chemistry Research, 1997Co-Authors: Yanxu Li, Chunhu Li, Shuanbing ZhangAbstract:The apparent kinetics of H2S removal by a ZnO−MnO desulfurizer were studied by thermogravimetric analysis. The experimental results show that the reaction is first order with respect to H2S concentration. In the temperature range 200−400 °C, the rate was controlled, at lower temperatures, by the grain surface reaction rate and, at higher temperatures, by the rate of intrapellet Diffusion, respectively. The apparent kinetic behavior could be modeled by the equivalent grain model. The activation energies of surface reaction and Solid Diffusion were determined to be 11.842 and 20.865 kJ/mol, respectively. An optimum reaction temperature was observed. Reasons for this and why the Solid Diffusion activation energy exceeded that of the surface reaction are proposed.
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A Study on the Apparent Kinetics of H2S Removal Using a ZnO−MnO Desulfurizer
Industrial & Engineering Chemistry Research, 1997Co-Authors: Yanxu Li, Chunhu Li, Shuanbing ZhangAbstract:The apparent kinetics of H2S removal by a ZnO−MnO desulfurizer were studied by thermogravimetric analysis. The experimental results show that the reaction is first order with respect to H2S concentration. In the temperature range 200−400 °C, the rate was controlled, at lower temperatures, by the grain surface reaction rate and, at higher temperatures, by the rate of intrapellet Diffusion, respectively. The apparent kinetic behavior could be modeled by the equivalent grain model. The activation energies of surface reaction and Solid Diffusion were determined to be 11.842 and 20.865 kJ/mol, respectively. An optimum reaction temperature was observed. Reasons for this and why the Solid Diffusion activation energy exceeded that of the surface reaction are proposed.
Zhenyu Liu - One of the best experts on this subject based on the ideXlab platform.
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kcl induced deactivation of v2o5 wo3 tio2 catalyst during selective catalytic reduction of no by nh3 comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
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KCl-induced deactivation of V2O5–WO3/TiO2 catalyst during selective catalytic reduction of NO by NH3: Comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
Sifan Chen - One of the best experts on this subject based on the ideXlab platform.
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kcl induced deactivation of v2o5 wo3 tio2 catalyst during selective catalytic reduction of no by nh3 comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
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KCl-induced deactivation of V2O5–WO3/TiO2 catalyst during selective catalytic reduction of NO by NH3: Comparison of poisoning methods
Chemical Engineering Journal, 2016Co-Authors: Tingyu Lei, Sifan Chen, Zhenyu Liu, Qingya LiuAbstract:Abstract Deactivation of V2O5/TiO2 catalysts during selective catalytic reduction (SCR) of NO by NH3, especially the alkali metal-induced deactivation, has received much attention in recent years. Many researches have been done using different poisoning methods to understand the deactivation behavior of catalyst in industry, but the results were somewhat inconsistent. This work compares the poisoning methods – wet impregnation, Solid Diffusion and vapor deposition from the viewpoint of deactivation rate and deactivation mechanism using V2O5–WO3/TiO2 as the catalyst and KCl as the poisoning substance. Results indicate that deactivation extent of the catalyst depends not only on the quantity of KCl but also on how KCl is introduced to the catalyst, following an order of vapor deposition ≫ Solid Diffusion > wet impregnation. The presence of V2O3 species due to interaction of K with oxygen in vanadium oxides is mainly responsible for the catalyst deactivation by wet impregnation. The formation of K2S2O7–V2O5 eutectic is mainly responsible for the catalyst deactivation by Solid Diffusion at a higher K/V ratio and vapor deposition due to the significant decrease of NH3 adsorption and increase in NH3 oxidation activity.
