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Huiping Zhang - One of the best experts on this subject based on the ideXlab platform.
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stability and deactivation of fe zsm 5 zeolite Catalyst for catalytic wet peroxide oxidation of phenol in a membrane reactor
RSC Advances, 2015Co-Authors: Songshan Jiang, Huiping Zhang, Ying Yan, Xinya ZhangAbstract:Stability and deactivation of Fe-ZSM-5 zeolite Catalyst for catalytic wet peroxide oxidation (CWPO) of phenol were studied in a membrane reactor. Firstly, the Fe-ZSM-5 zeolite membrane Catalyst was prepared by a paper-making/sintering process, secondary growth process and incipient wetness impregnation method. And the influence of residence time on the CWPO of phenol was evaluated by modifying the Catalyst Bed height. Then, stability of the Fe-ZSM-5 zeolite membrane Catalyst was studied by the long-term experiment (40 hours). Finally, the deactivation mechanisms of the Fe-ZSM-5 zeolite membrane Catalyst were investigated by N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermal gravimetric (TG) analysis, Fourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy, respectively. The results of CWPO of phenol showed that complete phenol conversion with a high TOC conversion (about 60%) was obtained at the Catalyst Bed height of 4 cm. Meanwhile, good stability with low Fe leaching concentration (about 0.5 mg L−1) and high phenol conversion (above 85%) were obtained after continuously running for 40 hours. Furthermore, the loss of active component, the partial phase change of Fe2O3, the crystallinity change of the ZSM-5 zeolite membrane and the coke formation on the surface of the Catalyst were found to be responsible for the deactivation of the Catalyst.
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efficient catalytic wet peroxide oxidation of phenol over fe zsm 5 Catalyst in a fixed Bed reactor
Separation and Purification Technology, 2014Co-Authors: Ying Yan, Songshan Jiang, Huiping ZhangAbstract:Abstract Fe-ZSM-5 Catalyst was prepared for catalytic wet peroxide oxidation (CWPO) of phenol in a fixed Bed reactor. The Catalyst was prepared by incipient wetness impregnation and characterized by using N 2 adsorption–desorption and X-ray diffraction (XRD). The optimum operation conditions for catalytic wet peroxide oxidation of phenol over Fe-ZSM-5 Catalyst were determined by investigating the effects of feed flow rate and Catalyst Bed height on the conversion of phenol, H 2 O 2 and total organic carbon (TOC). In addition, stability and reusability of the Fe-ZSM-5 Catalyst was studied by measuring the iron concentration leached out from the Catalyst. Finally, the probable reaction mechanism of phenol oxidation over Fe-ZSM-5 Catalyst in the fixed Bed reactor was considered by analyzing the HPLC patterns. The experimental results showed that the Fe-ZSM-5 Catalyst achieved the highest activity (99.2% phenol conversion and 77.7% TOC conversion, respectively) with remarkable low iron leaching concentration closed to zero at the temperature of 80 °C, feed flow rate of 2 mL/min and Catalyst Bed height of 3.8 cm. The Fe-ZSM-5 Catalyst showed a perfect stability with low iron leaching concentration (about 1.0 mg/L) and high phenol conversion (above 95.0%) after three successive runs. Meanwhile, few intermediate products with low concentration were observed by the analysis of HPLC patterns for the CWPO of phenol in the fixed Bed reactor.
Ying Yan - One of the best experts on this subject based on the ideXlab platform.
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stability and deactivation of fe zsm 5 zeolite Catalyst for catalytic wet peroxide oxidation of phenol in a membrane reactor
RSC Advances, 2015Co-Authors: Songshan Jiang, Huiping Zhang, Ying Yan, Xinya ZhangAbstract:Stability and deactivation of Fe-ZSM-5 zeolite Catalyst for catalytic wet peroxide oxidation (CWPO) of phenol were studied in a membrane reactor. Firstly, the Fe-ZSM-5 zeolite membrane Catalyst was prepared by a paper-making/sintering process, secondary growth process and incipient wetness impregnation method. And the influence of residence time on the CWPO of phenol was evaluated by modifying the Catalyst Bed height. Then, stability of the Fe-ZSM-5 zeolite membrane Catalyst was studied by the long-term experiment (40 hours). Finally, the deactivation mechanisms of the Fe-ZSM-5 zeolite membrane Catalyst were investigated by N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermal gravimetric (TG) analysis, Fourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy, respectively. The results of CWPO of phenol showed that complete phenol conversion with a high TOC conversion (about 60%) was obtained at the Catalyst Bed height of 4 cm. Meanwhile, good stability with low Fe leaching concentration (about 0.5 mg L−1) and high phenol conversion (above 85%) were obtained after continuously running for 40 hours. Furthermore, the loss of active component, the partial phase change of Fe2O3, the crystallinity change of the ZSM-5 zeolite membrane and the coke formation on the surface of the Catalyst were found to be responsible for the deactivation of the Catalyst.
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efficient catalytic wet peroxide oxidation of phenol over fe zsm 5 Catalyst in a fixed Bed reactor
Separation and Purification Technology, 2014Co-Authors: Ying Yan, Songshan Jiang, Huiping ZhangAbstract:Abstract Fe-ZSM-5 Catalyst was prepared for catalytic wet peroxide oxidation (CWPO) of phenol in a fixed Bed reactor. The Catalyst was prepared by incipient wetness impregnation and characterized by using N 2 adsorption–desorption and X-ray diffraction (XRD). The optimum operation conditions for catalytic wet peroxide oxidation of phenol over Fe-ZSM-5 Catalyst were determined by investigating the effects of feed flow rate and Catalyst Bed height on the conversion of phenol, H 2 O 2 and total organic carbon (TOC). In addition, stability and reusability of the Fe-ZSM-5 Catalyst was studied by measuring the iron concentration leached out from the Catalyst. Finally, the probable reaction mechanism of phenol oxidation over Fe-ZSM-5 Catalyst in the fixed Bed reactor was considered by analyzing the HPLC patterns. The experimental results showed that the Fe-ZSM-5 Catalyst achieved the highest activity (99.2% phenol conversion and 77.7% TOC conversion, respectively) with remarkable low iron leaching concentration closed to zero at the temperature of 80 °C, feed flow rate of 2 mL/min and Catalyst Bed height of 3.8 cm. The Fe-ZSM-5 Catalyst showed a perfect stability with low iron leaching concentration (about 1.0 mg/L) and high phenol conversion (above 95.0%) after three successive runs. Meanwhile, few intermediate products with low concentration were observed by the analysis of HPLC patterns for the CWPO of phenol in the fixed Bed reactor.
Songshan Jiang - One of the best experts on this subject based on the ideXlab platform.
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stability and deactivation of fe zsm 5 zeolite Catalyst for catalytic wet peroxide oxidation of phenol in a membrane reactor
RSC Advances, 2015Co-Authors: Songshan Jiang, Huiping Zhang, Ying Yan, Xinya ZhangAbstract:Stability and deactivation of Fe-ZSM-5 zeolite Catalyst for catalytic wet peroxide oxidation (CWPO) of phenol were studied in a membrane reactor. Firstly, the Fe-ZSM-5 zeolite membrane Catalyst was prepared by a paper-making/sintering process, secondary growth process and incipient wetness impregnation method. And the influence of residence time on the CWPO of phenol was evaluated by modifying the Catalyst Bed height. Then, stability of the Fe-ZSM-5 zeolite membrane Catalyst was studied by the long-term experiment (40 hours). Finally, the deactivation mechanisms of the Fe-ZSM-5 zeolite membrane Catalyst were investigated by N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermal gravimetric (TG) analysis, Fourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy, respectively. The results of CWPO of phenol showed that complete phenol conversion with a high TOC conversion (about 60%) was obtained at the Catalyst Bed height of 4 cm. Meanwhile, good stability with low Fe leaching concentration (about 0.5 mg L−1) and high phenol conversion (above 85%) were obtained after continuously running for 40 hours. Furthermore, the loss of active component, the partial phase change of Fe2O3, the crystallinity change of the ZSM-5 zeolite membrane and the coke formation on the surface of the Catalyst were found to be responsible for the deactivation of the Catalyst.
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efficient catalytic wet peroxide oxidation of phenol over fe zsm 5 Catalyst in a fixed Bed reactor
Separation and Purification Technology, 2014Co-Authors: Ying Yan, Songshan Jiang, Huiping ZhangAbstract:Abstract Fe-ZSM-5 Catalyst was prepared for catalytic wet peroxide oxidation (CWPO) of phenol in a fixed Bed reactor. The Catalyst was prepared by incipient wetness impregnation and characterized by using N 2 adsorption–desorption and X-ray diffraction (XRD). The optimum operation conditions for catalytic wet peroxide oxidation of phenol over Fe-ZSM-5 Catalyst were determined by investigating the effects of feed flow rate and Catalyst Bed height on the conversion of phenol, H 2 O 2 and total organic carbon (TOC). In addition, stability and reusability of the Fe-ZSM-5 Catalyst was studied by measuring the iron concentration leached out from the Catalyst. Finally, the probable reaction mechanism of phenol oxidation over Fe-ZSM-5 Catalyst in the fixed Bed reactor was considered by analyzing the HPLC patterns. The experimental results showed that the Fe-ZSM-5 Catalyst achieved the highest activity (99.2% phenol conversion and 77.7% TOC conversion, respectively) with remarkable low iron leaching concentration closed to zero at the temperature of 80 °C, feed flow rate of 2 mL/min and Catalyst Bed height of 3.8 cm. The Fe-ZSM-5 Catalyst showed a perfect stability with low iron leaching concentration (about 1.0 mg/L) and high phenol conversion (above 95.0%) after three successive runs. Meanwhile, few intermediate products with low concentration were observed by the analysis of HPLC patterns for the CWPO of phenol in the fixed Bed reactor.
Michael D P Mingos - One of the best experts on this subject based on the ideXlab platform.
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carbon dioxide reforming of methane with pt Catalysts using microwave dielectric heating
Catalysis Letters, 2003Co-Authors: Xunli Zhang, Michael D P Mingos, David O. HaywardAbstract:Microwave heating was applied to the catalytic reforming reaction of methane with carbon dioxide over platinum Catalysts. It was found that CO2 and CH4 conversions and the product selectivity (H2/CO) were generally higher under microwave conditions than that obtained with conventional heating at the same measured temperature. The effect of microwave heating was attributed to the formation of hot spots with higher temperature than that measured in the bulk Catalyst Bed.
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effects of microwave dielectric heating on heterogeneous catalysis
Catalysis Letters, 2003Co-Authors: Xunli Zhang, David O. Hayward, Michael D P MingosAbstract:The effect of microwave dielectric heating on both endothermic and exothermic reactions was investigated. Apparent equilibrium shifts for both reactions were observed which were attributed to the formation of spatial hot spots in the Catalyst Bed. The possible location of remarkable temperature gradients was examined experimentally and theoretically.
Xinya Zhang - One of the best experts on this subject based on the ideXlab platform.
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stability and deactivation of fe zsm 5 zeolite Catalyst for catalytic wet peroxide oxidation of phenol in a membrane reactor
RSC Advances, 2015Co-Authors: Songshan Jiang, Huiping Zhang, Ying Yan, Xinya ZhangAbstract:Stability and deactivation of Fe-ZSM-5 zeolite Catalyst for catalytic wet peroxide oxidation (CWPO) of phenol were studied in a membrane reactor. Firstly, the Fe-ZSM-5 zeolite membrane Catalyst was prepared by a paper-making/sintering process, secondary growth process and incipient wetness impregnation method. And the influence of residence time on the CWPO of phenol was evaluated by modifying the Catalyst Bed height. Then, stability of the Fe-ZSM-5 zeolite membrane Catalyst was studied by the long-term experiment (40 hours). Finally, the deactivation mechanisms of the Fe-ZSM-5 zeolite membrane Catalyst were investigated by N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermal gravimetric (TG) analysis, Fourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy, respectively. The results of CWPO of phenol showed that complete phenol conversion with a high TOC conversion (about 60%) was obtained at the Catalyst Bed height of 4 cm. Meanwhile, good stability with low Fe leaching concentration (about 0.5 mg L−1) and high phenol conversion (above 85%) were obtained after continuously running for 40 hours. Furthermore, the loss of active component, the partial phase change of Fe2O3, the crystallinity change of the ZSM-5 zeolite membrane and the coke formation on the surface of the Catalyst were found to be responsible for the deactivation of the Catalyst.