The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform
Georg Schaub - One of the best experts on this subject based on the ideXlab platform.
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kinetics of selective Catalytic nox reduction in a novel gas particle Filter reactor Catalytic Filter Element and sponge insert
Industrial & Engineering Chemistry Research, 2008Co-Authors: Sebastian Zurcher, Marius Hackel, Georg SchaubAbstract:Multifunctional reactors for the simultaneous filtration and selective Catalytic reduction (SCR) of NOx in high-temperature gas cleaning are of industrial interest. Two configurations have been investigated, using a V2O5/WO3/TiO2-based catalyst: in one configuration, ceramic candle material can be impregnated with a catalyst providing, both efficient particle separation and high activity for the removal of NOx, whereas, in the other configuration, ceramic sponges that have been impregnated with a catalyst are placed inside a ceramic candle. Sponges, which, in the literature, are most commonly called open-cell foams, are highly porous structures and recently have been investigated as novel catalyst supports. For characterization of these catalyst configurations, a kinetic analysis has been performed, supported by additional experimental data obtained in a fixed-bed reactor. The inlet concentrations, modified residence time, and temperature were varied to validate a mathematical reactor model, based on kno...
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Catalytic Filter Elements for combined particle separation and nitrogen oxides removal from gas streams
Powder Technology, 2008Co-Authors: Steffen Heidenreich, M. Nacken, Marius Hackel, Georg SchaubAbstract:Abstract The development of a Catalytically active ceramic Filter Element for the combined removal of particles and nitrogen oxides from gas streams is presented. A special catalyst support layer with a high BET surface followed by optimized Catalytic activation was developed to reach the required nitrogen oxides (NOx) emission levels. The Catalytic properties of the developed Filter Element were studied in detail in a small test rig using cylindrical Filter segments. The Catalytic Filter Elements were tested under different operating conditions, such as filtration velocity, operating temperature, and nitrogen oxide (NO) inlet concentrations. Moreover, the filtration properties of the Filter Elements were determined. As result of these studies, the optimum operating conditions for the Catalytic Filter Element are determined with respect to a minimum differential pressure value in combination with a high Catalytic activity towards NOx removal. The advantages and possibilities of the newly developed Filter Elements are shown and discussed.
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Catalytic activation of ceramic Filter Elements for combined particle separation, NOx removal and VOC total oxidation
Applied Catalysis B-environmental, 2007Co-Authors: M. Nacken, Steffen Heidenreich, Marius Hackel, Georg SchaubAbstract:The development of a Catalytically active Filter Element for combined particle separation and NOx removal or VOC total oxidation, respectively, is presented. For NOx removal by selective Catalytic reduction (SCR) a Catalytic coating based on a TiO2–V2O5–WO3 catalyst system was developed on a ceramic Filter Element. Different TiO2 sols of tailor-made mean particle size between 40 and 190 nm were prepared by the sol–gel process and used for the impregnation of Filter Element cylinders by the incipient wetness technique. The obtained TiO2-impregnated sintered Filter Element cylinders exhibit BET surface areas in the range between 0.5 and 1.3 m2/g. Selected TiO2-impregnated Filter Element cylinders of high BET surface area were Catalytically activated by impregnation with a V2O5 and WO3 precursor solution. The obtained Catalytic Filter Element cylinders show high SCR activity leading to 96% NO conversion at 300 °C, a filtration velocity of 2 cm/s and an NO inlet concentration of 500 vol.-ppm. The corresponding differential pressures fulfill the requirements for typical hot gas filtration applications. For VOC total oxidation, a TiO2-impregnated Filter Element support was Catalytically activated with a Pt/V2O5 system. Complete oxidation of propene with 100% selectivity to CO2 was achieved at 300 °C, a filtration velocity of 2 cm/s and a propene inlet concentration of 300 vol.-ppm.
Marius Hackel - One of the best experts on this subject based on the ideXlab platform.
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kinetics of selective Catalytic nox reduction in a novel gas particle Filter reactor Catalytic Filter Element and sponge insert
Industrial & Engineering Chemistry Research, 2008Co-Authors: Sebastian Zurcher, Marius Hackel, Georg SchaubAbstract:Multifunctional reactors for the simultaneous filtration and selective Catalytic reduction (SCR) of NOx in high-temperature gas cleaning are of industrial interest. Two configurations have been investigated, using a V2O5/WO3/TiO2-based catalyst: in one configuration, ceramic candle material can be impregnated with a catalyst providing, both efficient particle separation and high activity for the removal of NOx, whereas, in the other configuration, ceramic sponges that have been impregnated with a catalyst are placed inside a ceramic candle. Sponges, which, in the literature, are most commonly called open-cell foams, are highly porous structures and recently have been investigated as novel catalyst supports. For characterization of these catalyst configurations, a kinetic analysis has been performed, supported by additional experimental data obtained in a fixed-bed reactor. The inlet concentrations, modified residence time, and temperature were varied to validate a mathematical reactor model, based on kno...
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Catalytic Filter Elements for combined particle separation and nitrogen oxides removal from gas streams
Powder Technology, 2008Co-Authors: Steffen Heidenreich, M. Nacken, Marius Hackel, Georg SchaubAbstract:Abstract The development of a Catalytically active ceramic Filter Element for the combined removal of particles and nitrogen oxides from gas streams is presented. A special catalyst support layer with a high BET surface followed by optimized Catalytic activation was developed to reach the required nitrogen oxides (NOx) emission levels. The Catalytic properties of the developed Filter Element were studied in detail in a small test rig using cylindrical Filter segments. The Catalytic Filter Elements were tested under different operating conditions, such as filtration velocity, operating temperature, and nitrogen oxide (NO) inlet concentrations. Moreover, the filtration properties of the Filter Elements were determined. As result of these studies, the optimum operating conditions for the Catalytic Filter Element are determined with respect to a minimum differential pressure value in combination with a high Catalytic activity towards NOx removal. The advantages and possibilities of the newly developed Filter Elements are shown and discussed.
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Catalytic activation of ceramic Filter Elements for combined particle separation, NOx removal and VOC total oxidation
Applied Catalysis B-environmental, 2007Co-Authors: M. Nacken, Steffen Heidenreich, Marius Hackel, Georg SchaubAbstract:The development of a Catalytically active Filter Element for combined particle separation and NOx removal or VOC total oxidation, respectively, is presented. For NOx removal by selective Catalytic reduction (SCR) a Catalytic coating based on a TiO2–V2O5–WO3 catalyst system was developed on a ceramic Filter Element. Different TiO2 sols of tailor-made mean particle size between 40 and 190 nm were prepared by the sol–gel process and used for the impregnation of Filter Element cylinders by the incipient wetness technique. The obtained TiO2-impregnated sintered Filter Element cylinders exhibit BET surface areas in the range between 0.5 and 1.3 m2/g. Selected TiO2-impregnated Filter Element cylinders of high BET surface area were Catalytically activated by impregnation with a V2O5 and WO3 precursor solution. The obtained Catalytic Filter Element cylinders show high SCR activity leading to 96% NO conversion at 300 °C, a filtration velocity of 2 cm/s and an NO inlet concentration of 500 vol.-ppm. The corresponding differential pressures fulfill the requirements for typical hot gas filtration applications. For VOC total oxidation, a TiO2-impregnated Filter Element support was Catalytically activated with a Pt/V2O5 system. Complete oxidation of propene with 100% selectivity to CO2 was achieved at 300 °C, a filtration velocity of 2 cm/s and a propene inlet concentration of 300 vol.-ppm.
M. Nacken - One of the best experts on this subject based on the ideXlab platform.
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New DeTar Catalytic Filter with integrated Catalytic ceramic foam: Catalytic activity under model and real bio syngas conditions
Fuel Processing Technology, 2015Co-Authors: M. Nacken, Sergio Rapagna, Katia Gallucci, Steffen Heidenreich, Andria D'orazio, Gino V Baron, Joeri F. M. Denayer, Pier Ugo FoscoloAbstract:Abstract The Catalytic activity of a new Catalytic Filter of combined design consisting of a Catalytic Filter candle with an integrated Catalytic ceramic foam was calculated under model gas conditions at 800 and 850 °C in the absence and presence of 100 ppmv H 2 S on the basis of separate and combined measurements of appropriate Catalytic Filter Element and ceramic foam disk samples. Real gas validation of the determined model gas activity of the Catalytic Filter of combined design in a bench-scale gasifier was performed to check-up, if model gas conversions can be used as bases for the prediction of real tar conversions. A calculation of the model gas activity of the Catalytic Filter at a superficial velocity of 2 cm/s based on the disk measurements results to 99% naphthalene conversion at 850 °C in the absence of H 2 S and 94% in the presence of 100 ppmv H 2 S. At 800 °C, the calculated conversion is 95% in the absence and 70% in the presence of 100 ppmv H 2 S resulting in an estimated conversion of 85% at an H 2 S content of 40 ppmv. This value is comparable with the measured real tar conversion of 81% at 790 °C and a superficial velocity of 2.5 cm/s.
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Catalytic Filter Elements for combined particle separation and nitrogen oxides removal from gas streams
Powder Technology, 2008Co-Authors: Steffen Heidenreich, M. Nacken, Marius Hackel, Georg SchaubAbstract:Abstract The development of a Catalytically active ceramic Filter Element for the combined removal of particles and nitrogen oxides from gas streams is presented. A special catalyst support layer with a high BET surface followed by optimized Catalytic activation was developed to reach the required nitrogen oxides (NOx) emission levels. The Catalytic properties of the developed Filter Element were studied in detail in a small test rig using cylindrical Filter segments. The Catalytic Filter Elements were tested under different operating conditions, such as filtration velocity, operating temperature, and nitrogen oxide (NO) inlet concentrations. Moreover, the filtration properties of the Filter Elements were determined. As result of these studies, the optimum operating conditions for the Catalytic Filter Element are determined with respect to a minimum differential pressure value in combination with a high Catalytic activity towards NOx removal. The advantages and possibilities of the newly developed Filter Elements are shown and discussed.
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Catalytic activation of ceramic Filter Elements for combined particle separation, NOx removal and VOC total oxidation
Applied Catalysis B-environmental, 2007Co-Authors: M. Nacken, Steffen Heidenreich, Marius Hackel, Georg SchaubAbstract:The development of a Catalytically active Filter Element for combined particle separation and NOx removal or VOC total oxidation, respectively, is presented. For NOx removal by selective Catalytic reduction (SCR) a Catalytic coating based on a TiO2–V2O5–WO3 catalyst system was developed on a ceramic Filter Element. Different TiO2 sols of tailor-made mean particle size between 40 and 190 nm were prepared by the sol–gel process and used for the impregnation of Filter Element cylinders by the incipient wetness technique. The obtained TiO2-impregnated sintered Filter Element cylinders exhibit BET surface areas in the range between 0.5 and 1.3 m2/g. Selected TiO2-impregnated Filter Element cylinders of high BET surface area were Catalytically activated by impregnation with a V2O5 and WO3 precursor solution. The obtained Catalytic Filter Element cylinders show high SCR activity leading to 96% NO conversion at 300 °C, a filtration velocity of 2 cm/s and an NO inlet concentration of 500 vol.-ppm. The corresponding differential pressures fulfill the requirements for typical hot gas filtration applications. For VOC total oxidation, a TiO2-impregnated Filter Element support was Catalytically activated with a Pt/V2O5 system. Complete oxidation of propene with 100% selectivity to CO2 was achieved at 300 °C, a filtration velocity of 2 cm/s and a propene inlet concentration of 300 vol.-ppm.
Steffen Heidenreich - One of the best experts on this subject based on the ideXlab platform.
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New DeTar Catalytic Filter with integrated Catalytic ceramic foam: Catalytic activity under model and real bio syngas conditions
Fuel Processing Technology, 2015Co-Authors: M. Nacken, Sergio Rapagna, Katia Gallucci, Steffen Heidenreich, Andria D'orazio, Gino V Baron, Joeri F. M. Denayer, Pier Ugo FoscoloAbstract:Abstract The Catalytic activity of a new Catalytic Filter of combined design consisting of a Catalytic Filter candle with an integrated Catalytic ceramic foam was calculated under model gas conditions at 800 and 850 °C in the absence and presence of 100 ppmv H 2 S on the basis of separate and combined measurements of appropriate Catalytic Filter Element and ceramic foam disk samples. Real gas validation of the determined model gas activity of the Catalytic Filter of combined design in a bench-scale gasifier was performed to check-up, if model gas conversions can be used as bases for the prediction of real tar conversions. A calculation of the model gas activity of the Catalytic Filter at a superficial velocity of 2 cm/s based on the disk measurements results to 99% naphthalene conversion at 850 °C in the absence of H 2 S and 94% in the presence of 100 ppmv H 2 S. At 800 °C, the calculated conversion is 95% in the absence and 70% in the presence of 100 ppmv H 2 S resulting in an estimated conversion of 85% at an H 2 S content of 40 ppmv. This value is comparable with the measured real tar conversion of 81% at 790 °C and a superficial velocity of 2.5 cm/s.
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Catalytic Filter Elements for combined particle separation and nitrogen oxides removal from gas streams
Powder Technology, 2008Co-Authors: Steffen Heidenreich, M. Nacken, Marius Hackel, Georg SchaubAbstract:Abstract The development of a Catalytically active ceramic Filter Element for the combined removal of particles and nitrogen oxides from gas streams is presented. A special catalyst support layer with a high BET surface followed by optimized Catalytic activation was developed to reach the required nitrogen oxides (NOx) emission levels. The Catalytic properties of the developed Filter Element were studied in detail in a small test rig using cylindrical Filter segments. The Catalytic Filter Elements were tested under different operating conditions, such as filtration velocity, operating temperature, and nitrogen oxide (NO) inlet concentrations. Moreover, the filtration properties of the Filter Elements were determined. As result of these studies, the optimum operating conditions for the Catalytic Filter Element are determined with respect to a minimum differential pressure value in combination with a high Catalytic activity towards NOx removal. The advantages and possibilities of the newly developed Filter Elements are shown and discussed.
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Catalytic activation of ceramic Filter Elements for combined particle separation, NOx removal and VOC total oxidation
Applied Catalysis B-environmental, 2007Co-Authors: M. Nacken, Steffen Heidenreich, Marius Hackel, Georg SchaubAbstract:The development of a Catalytically active Filter Element for combined particle separation and NOx removal or VOC total oxidation, respectively, is presented. For NOx removal by selective Catalytic reduction (SCR) a Catalytic coating based on a TiO2–V2O5–WO3 catalyst system was developed on a ceramic Filter Element. Different TiO2 sols of tailor-made mean particle size between 40 and 190 nm were prepared by the sol–gel process and used for the impregnation of Filter Element cylinders by the incipient wetness technique. The obtained TiO2-impregnated sintered Filter Element cylinders exhibit BET surface areas in the range between 0.5 and 1.3 m2/g. Selected TiO2-impregnated Filter Element cylinders of high BET surface area were Catalytically activated by impregnation with a V2O5 and WO3 precursor solution. The obtained Catalytic Filter Element cylinders show high SCR activity leading to 96% NO conversion at 300 °C, a filtration velocity of 2 cm/s and an NO inlet concentration of 500 vol.-ppm. The corresponding differential pressures fulfill the requirements for typical hot gas filtration applications. For VOC total oxidation, a TiO2-impregnated Filter Element support was Catalytically activated with a Pt/V2O5 system. Complete oxidation of propene with 100% selectivity to CO2 was achieved at 300 °C, a filtration velocity of 2 cm/s and a propene inlet concentration of 300 vol.-ppm.
Sebastian Zurcher - One of the best experts on this subject based on the ideXlab platform.
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kinetics of selective Catalytic nox reduction in a novel gas particle Filter reactor Catalytic Filter Element and sponge insert
Industrial & Engineering Chemistry Research, 2008Co-Authors: Sebastian Zurcher, Marius Hackel, Georg SchaubAbstract:Multifunctional reactors for the simultaneous filtration and selective Catalytic reduction (SCR) of NOx in high-temperature gas cleaning are of industrial interest. Two configurations have been investigated, using a V2O5/WO3/TiO2-based catalyst: in one configuration, ceramic candle material can be impregnated with a catalyst providing, both efficient particle separation and high activity for the removal of NOx, whereas, in the other configuration, ceramic sponges that have been impregnated with a catalyst are placed inside a ceramic candle. Sponges, which, in the literature, are most commonly called open-cell foams, are highly porous structures and recently have been investigated as novel catalyst supports. For characterization of these catalyst configurations, a kinetic analysis has been performed, supported by additional experimental data obtained in a fixed-bed reactor. The inlet concentrations, modified residence time, and temperature were varied to validate a mathematical reactor model, based on kno...