The Experts below are selected from a list of 59325 Experts worldwide ranked by ideXlab platform
Huijuan Gong - One of the best experts on this subject based on the ideXlab platform.
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Oxidative degradation stability and hydrogen sulfide removal performance of dual-ligand iron chelate of Fe-EDTA/CA
Environmental Technology (United Kingdom), 2018Co-Authors: Xinmei Miao, Yiwen Ma, Zezhi Chen, Huijuan GongAbstract:© 2017 Informa UK Limited, trading as Taylor & Francis Group Catalytic oxidation Desulfurization using chelated iron catalyst is an effective method to remove H 2 S from various gas streams including biogas. However, the ligand of ethylenediaminetetraacetic acid (EDTA), which is usually adopted to prepare chelated iron catalyst, is liable to be oxidative degraded, and leads to the loss of Desulfurization performance. In order to improve the degradation stability of the iron chelate, a series of iron chelates composed of two ligands including citric acid (CA) and EDTA were prepared and the oxidative degradation stability as well as Desulfurization performance of these chelated iron catalysts were studied. Results show that the iron chelate of Fe-CA is more stable than Fe-EDTA, while for the Desulfurization performance, the situation is converse. For the dual-ligand iron chelates of Fe-EDTA/CA, with the increase of mol ratio of CA to EDTA in the iron chelate solution, the oxidative degradation stability increased while the Desulfurization performance decreased. The results of this work showed that Fe-EDTA/CA with a mol ratio of CA:EDTA = 1:1 presents a relative high oxidative degradation stability and an acceptable Desulfurization performance with over 90% of H 2 S removal efficiency.
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Study on selective hydrogen sulfide removal over carbon dioxide by catalytic oxidative absorption method with chelated iron as the catalyst
Renewable Energy, 2016Co-Authors: Yiwen Ma, Zezhi Chen, Huijuan GongAbstract:H2S is a detrimental impurity that must be removed for upgrading biogas to biomethane. H2S removal selectivity over CO2 employing catalytic oxidative absorption method and its influence factors were studied in this work. The Desulfurization experiments were performed in a laboratory apparatus using EDTA-Fe as the catalyst and metered mixture of 60% (v/v) CH4, 33% (v/v) CO2 and 2000-3000 ppmv H2S balanced by N2 as the simulated biogas. It was found that for a given catalytic oxidative Desulfurization system, it exists a critical pH, at which Desulfurization selectivity achieves the highest. It was also observed that Desulfurization selectivity increased along with the increase of chelated iron concentration, gas flow rate, and ratio of gas flow rate to liquid flow rate (G/L). This demonstrated that high selectivity and high efficiency for biogas Desulfurization could both be achieved through optimizing these parameters. Specific to the Desulfurization system of this work, when the gas flow rate was set as 1.1 L/min, after optimizing the above mentioned parameters, i.e. EDTA-Fe concentration of 0.084 mol/L, absorption solution pH of 7.8, and G/L of 55, the Desulfurization selectivity factor reached 142.1 with H2S removal efficiency attained 96.7%.
Ji-hong Zhou - One of the best experts on this subject based on the ideXlab platform.
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Discussion about Desulfurization Technology and Management
Key Engineering Materials, 2010Co-Authors: Ji-hong Zhou, Yu Lian, Bin WangAbstract:Hydrogen sulfide is a kind of poisonous and harmful gas. There are a lot of Desulfurization methods. The presents condition, features and application of Desulfurization technology are introduced in this paper. It also point out that we should pay more attention to the Desulfurization technology which will be introduced. Meanwhile several kinds of Desulfurization technology and management methods are presented especially. The merit and fault of all kinds of Desulfurization methods are proposed in this paper too.
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Study on Desulfurization (H2S) Technology Trend
2010 International Conference on Challenges in Environmental Science and Computer Engineering, 2010Co-Authors: Ji-hong ZhouAbstract:Hydrogen sulfide is a kind of poisonous and harmful gas. There are a lot of Desulfurization methods. Because the traditional desulphurization technology have some shortcomings, some new Desulfurization methods that make people pay more attention to environmental pollution control and with the development and application of some high-new technology are introduced in this paper. Meantime the Desulfurization technology trend is studied in this paper. The results show that different Desulfurization technologies have their own characteristics. But regardless of what new technology replaces the traditional Desulfurization technology, efficient low-input, resource-based, no secondary pollution will be the main stream of the development of Desulfurization technology in the future.
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Experimental Study on Desulfurization Performance of Pocket-Fly Gas
2009 Third International Symposium on Intelligent Information Technology Application Workshops, 2009Co-Authors: Ji-hong Zhou, Biao Zhang, Jun-guang Zhao, Ping LiAbstract:Sulfur dioxide is a kind of poisonous and harmful gas, and will pollute atmosphere environment if exhaust it directly. There are a lot of Desulfurization methods so far. The Desulfurization efficiency of dry-Desulfurization agent that is made under the same proportion, hydration temperature and hydration time is studied in this paper. The results indicate that the Desulfurization efficiency of the pocket-fly ash increase while the Desulfurization time and hydration time increase, and the Desulfurization efficiency of the pocket-fly ash decrease while the Desulfurization time and hydration temperature increase, and The Desulfurization efficiency of pocket-fly ash is little lower than activity carbon, at the same time introduce the Desulfurization mechanism.
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Reaction mechanism and experimental research about Load Zinc-Activated Carbon
2009 2nd International Conference on Power Electronics and Intelligent Transportation System (PEITS), 2009Co-Authors: Ping Li, Ji-hong ZhouAbstract:Hydrogen sulfide is a kind of poisonous and harmful gas, and will pollute atmosphere environment if exhaust it directly. There are a lot of Desulfurization methods. The Desulfurization experiment and reaction mechanism in which the activated carbon is soaked with zinc nitrate solution is researched on the basis of dry- Desulfurization. The experimental results indicate the Desulfurization efficiency of the desulfurizer of Load Zinc-Activated Carbon is better than that of the activated carbon, and the higher the high of the Desulfurization agent is, the better the Desulfurization efficiency is. The Desulfurization mechanism have physical and chemical absorption.
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Study on Desulfurization(H2S) capacity of activated carbon
2009 2nd International Conference on Power Electronics and Intelligent Transportation System (PEITS), 2009Co-Authors: Ping Li, Ji-hong ZhouAbstract:Hydrogen sulfide is a kind of toxic and harmful gas and will pollute atmosphere environment if exhaust it directly. There are a lot of Desulfurization methods so far, and the Desulfurization by activated carbon is a kind of better method. The Desulfurization capacity of activated carbon fiber(ACF), granular activated carbon(GAC)and power activated carbon(PAC) are studied in this paper. The results indicate that the Desulfurization efficiency is ACF>powder activated carbon >granular activated carbon, the higher the packing height of ACF is, the better the Desulfurization capacity of ACF. Meanwhile, the desulphurization mechanism is analyzed briefly in this paper.
Chunshan Song - One of the best experts on this subject based on the ideXlab platform.
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deep Desulfurization of gasoline by selective adsorption over nickel based adsorbent for fuel cell applications
Industrial & Engineering Chemistry Research, 2005Co-Authors: Michael Sprague, Chunshan SongAbstract:Adsorptive Desulfurization of model gasoline fuels and a real gasoline over a nickel-based adsorbent Ni−Al was conducted in a flowing adsorption system at a temperature range of 25−200 °C under ambient pressure without using H2 gas in order to evaluate the Desulfurization performance of the adsorbent for producing ultra-low-sulfur gasoline for fuel cell applications. Adsorptive capacity and selectivity of the Ni−Al adsorbent for various sulfur compounds and the effects of coexisting olefin in gasoline as well as adsorptive conditions on the adsorptive performance were examined. It was found that the nickel-based adsorbent shows high capacity and selectivity for the adsorptive Desulfurization of gasoline. Olefins in gasoline have a strong inhibiting effect on the Desulfurization performance of the nickel-based adsorbent at room temperature. Increasing the temperature to 200 °C can significantly improve the Desulfurization performance of the nickel-based adsorbent for real gasoline. The adsorption mechanism...
Yiwen Ma - One of the best experts on this subject based on the ideXlab platform.
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Oxidative degradation stability and hydrogen sulfide removal performance of dual-ligand iron chelate of Fe-EDTA/CA
Environmental Technology (United Kingdom), 2018Co-Authors: Xinmei Miao, Yiwen Ma, Zezhi Chen, Huijuan GongAbstract:© 2017 Informa UK Limited, trading as Taylor & Francis Group Catalytic oxidation Desulfurization using chelated iron catalyst is an effective method to remove H 2 S from various gas streams including biogas. However, the ligand of ethylenediaminetetraacetic acid (EDTA), which is usually adopted to prepare chelated iron catalyst, is liable to be oxidative degraded, and leads to the loss of Desulfurization performance. In order to improve the degradation stability of the iron chelate, a series of iron chelates composed of two ligands including citric acid (CA) and EDTA were prepared and the oxidative degradation stability as well as Desulfurization performance of these chelated iron catalysts were studied. Results show that the iron chelate of Fe-CA is more stable than Fe-EDTA, while for the Desulfurization performance, the situation is converse. For the dual-ligand iron chelates of Fe-EDTA/CA, with the increase of mol ratio of CA to EDTA in the iron chelate solution, the oxidative degradation stability increased while the Desulfurization performance decreased. The results of this work showed that Fe-EDTA/CA with a mol ratio of CA:EDTA = 1:1 presents a relative high oxidative degradation stability and an acceptable Desulfurization performance with over 90% of H 2 S removal efficiency.
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Study on selective hydrogen sulfide removal over carbon dioxide by catalytic oxidative absorption method with chelated iron as the catalyst
Renewable Energy, 2016Co-Authors: Yiwen Ma, Zezhi Chen, Huijuan GongAbstract:H2S is a detrimental impurity that must be removed for upgrading biogas to biomethane. H2S removal selectivity over CO2 employing catalytic oxidative absorption method and its influence factors were studied in this work. The Desulfurization experiments were performed in a laboratory apparatus using EDTA-Fe as the catalyst and metered mixture of 60% (v/v) CH4, 33% (v/v) CO2 and 2000-3000 ppmv H2S balanced by N2 as the simulated biogas. It was found that for a given catalytic oxidative Desulfurization system, it exists a critical pH, at which Desulfurization selectivity achieves the highest. It was also observed that Desulfurization selectivity increased along with the increase of chelated iron concentration, gas flow rate, and ratio of gas flow rate to liquid flow rate (G/L). This demonstrated that high selectivity and high efficiency for biogas Desulfurization could both be achieved through optimizing these parameters. Specific to the Desulfurization system of this work, when the gas flow rate was set as 1.1 L/min, after optimizing the above mentioned parameters, i.e. EDTA-Fe concentration of 0.084 mol/L, absorption solution pH of 7.8, and G/L of 55, the Desulfurization selectivity factor reached 142.1 with H2S removal efficiency attained 96.7%.
Zezhi Chen - One of the best experts on this subject based on the ideXlab platform.
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Oxidative degradation stability and hydrogen sulfide removal performance of dual-ligand iron chelate of Fe-EDTA/CA
Environmental Technology (United Kingdom), 2018Co-Authors: Xinmei Miao, Yiwen Ma, Zezhi Chen, Huijuan GongAbstract:© 2017 Informa UK Limited, trading as Taylor & Francis Group Catalytic oxidation Desulfurization using chelated iron catalyst is an effective method to remove H 2 S from various gas streams including biogas. However, the ligand of ethylenediaminetetraacetic acid (EDTA), which is usually adopted to prepare chelated iron catalyst, is liable to be oxidative degraded, and leads to the loss of Desulfurization performance. In order to improve the degradation stability of the iron chelate, a series of iron chelates composed of two ligands including citric acid (CA) and EDTA were prepared and the oxidative degradation stability as well as Desulfurization performance of these chelated iron catalysts were studied. Results show that the iron chelate of Fe-CA is more stable than Fe-EDTA, while for the Desulfurization performance, the situation is converse. For the dual-ligand iron chelates of Fe-EDTA/CA, with the increase of mol ratio of CA to EDTA in the iron chelate solution, the oxidative degradation stability increased while the Desulfurization performance decreased. The results of this work showed that Fe-EDTA/CA with a mol ratio of CA:EDTA = 1:1 presents a relative high oxidative degradation stability and an acceptable Desulfurization performance with over 90% of H 2 S removal efficiency.
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Study on selective hydrogen sulfide removal over carbon dioxide by catalytic oxidative absorption method with chelated iron as the catalyst
Renewable Energy, 2016Co-Authors: Yiwen Ma, Zezhi Chen, Huijuan GongAbstract:H2S is a detrimental impurity that must be removed for upgrading biogas to biomethane. H2S removal selectivity over CO2 employing catalytic oxidative absorption method and its influence factors were studied in this work. The Desulfurization experiments were performed in a laboratory apparatus using EDTA-Fe as the catalyst and metered mixture of 60% (v/v) CH4, 33% (v/v) CO2 and 2000-3000 ppmv H2S balanced by N2 as the simulated biogas. It was found that for a given catalytic oxidative Desulfurization system, it exists a critical pH, at which Desulfurization selectivity achieves the highest. It was also observed that Desulfurization selectivity increased along with the increase of chelated iron concentration, gas flow rate, and ratio of gas flow rate to liquid flow rate (G/L). This demonstrated that high selectivity and high efficiency for biogas Desulfurization could both be achieved through optimizing these parameters. Specific to the Desulfurization system of this work, when the gas flow rate was set as 1.1 L/min, after optimizing the above mentioned parameters, i.e. EDTA-Fe concentration of 0.084 mol/L, absorption solution pH of 7.8, and G/L of 55, the Desulfurization selectivity factor reached 142.1 with H2S removal efficiency attained 96.7%.
