Study on the Stability and Efficiency of Supported Catalysts
發(fā)布時(shí)間：2021-08-08 05:46
清潔安全的水資源是除空氣以外的最重要的資源,然而由于人口的過(guò)度增長(zhǎng)、城市化發(fā)展、工業(yè)以及其他行業(yè)對(duì)水資源的利用,導(dǎo)致水的持續(xù)利用成為一個(gè)很大的挑戰(zhàn)。水污染問(wèn)題很令人擔(dān)憂,因?yàn)槿蛞呀?jīng)有11億人面臨飲用水不足的問(wèn)題,而25億人甚至使用污染水。為了解決這個(gè)問(wèn)題,已經(jīng)有很多傳統(tǒng)的和先進(jìn)的處理系統(tǒng)應(yīng)用于水處理。然而,由于廢水的復(fù)雜的化學(xué)性質(zhì),還沒(méi)有一種處理技術(shù)能將難降解污染物高效地處理成法律可以接受的水平。雙氧水是一種資源豐富、清潔、具有活性的氧化劑,這使它與具有緩沖能力的碳酸氫鹽的聯(lián)合使用處理廢水具有很強(qiáng)的吸引力。本文中,我們應(yīng)用碳酸氫鹽活化過(guò)氧化氫的理念,主要集中于對(duì)已應(yīng)用的處理方法在穩(wěn)定和效率上的提高和改進(jìn)。我們使用固定床降解氯酚和染料,評(píng)估這兩項(xiàng)參數(shù)（效率和穩(wěn)定性）。結(jié)果表明,碳酸氫鹽不僅可以提高降解效率也可以使負(fù)載催化劑更加穩(wěn)定,這對(duì)于綠色、高效和可持續(xù)的廢水處理系統(tǒng)的發(fā)展有很大的幫助。本論文的第二部分,我們集中于使用碳酸氫鹽活化雙氧水體系在負(fù)載催化劑的條件下,降解了4一氯苯酚,2,4一二氯苯酚,2,4,6一三氯苯酚和苯酚這四個(gè)模型化合物。針對(duì)于對(duì)目標(biāo)化合物的降解率、化學(xué)需氧量（CO...
【文章來(lái)源】：華中科技大學(xué)湖北省 211工程院校 985工程院校 教育部直屬院校
【文章頁(yè)數(shù)】：155 頁(yè)
【學(xué)位級(jí)別】：博士
【文章目錄】：
摘要
Abstract
1 Introduction
1.1 Water Pollution
1.2 Water Pollution with Organic Compounds
1.3 Conventional Technologies and Water Pollution
1.4 Advanced Oxidation Process (AOPs)
1.4.1 Catalytic Wet Hydrogen Peroxide Oxidation (CWPOs) Appeared to be the Best Solution
1.4.2 Application and Limitations of Fenton's Based Technology in Waste Water Treatment
1.4.3 Need for Searching an Alternative of Fenton's like Reagent in Waste Water Treatment
1.4.4 Application of Heterogeneous Catalyst in the Treatment of Wastewater
1.5 Hydrotalcite Based Supported Catalyst
1.5.1 Structure of Hydrotalcite
1.5.2 Layered Double Hydrotacites as Catalyst
1.5.3 Metals Exchanged Zeolites Based Supported Catalyst
1.6 Challenges in Catalytic Waste Water Treatments
1.7 Bicarbonate Activation of Hydrogen Peroxide system (BAP)
1.7.1 Role of Bicarbonate Activation of Hydrogen Peroxide (BAP) in Wastewater (M/HCO_3~-/H_2O_2 system)
1.7.2 Future of BAP System in the Development of Green Treatment System
1.8 Target Strategy and Content
1.9 Research Aim and Conclusion
References
2 Degradation of Chlorophenols by Supported Co-Mg-Al LDH BasedCatalyst in BAP System
2.1 Experimental Section
2.1.1 Chemicals and Reagents
2.1.2 Preparation of Powdered Catalyst for Bench Experiments (CoMgAl-HTs and MgAl-HTs)
2.1.3 Preparation of Supported Catalyst for Fixed Bed Experiments (CoMgAl-SHTs)
2.1.4 Pollutants Degradation in Bench Test Experiments
2.1.5 Pollutants Degradation in Fixed Bed Experiments
2.1.6 Analyses
2.2 Results and Discussion
2.2.1 Characterization of powdered catalysts
2.2.2 Activity of Catalyst/HCO_3~-/H_2O_2 System on Bench Level
2.3 Mechanistic Discussions
2.4 Application of Catalyst in Fixed Bed Reactor
2.5 Conclusions
References
3 Controlled Leaching with Prolonged Activity for Co-LDH SupportedCatalyst during Treatment of Organic Dyes Using BAP System
3.1 Experimental section
3.1.1 Chemical and Reagents
3.1.2 Preparation of Powdered Catalyst for Bench Expeirments (CoMgAl-HTs andMgAI-HTs)
3.1.3 Preparation of Catalyst for Fixed Bed
3.1.4 Degradation of Methylene Orange and Methylene Blue in Bench Experiment
3.1.5 Degradation of Methylene Blue in Fixed Bed Experiments
3.1.6 Procedure of Analysis
3.2 Result and Discussion
3.2.1 Catalyst Characterizations
3.3 Catalytic Performance of CoMgAl Catalysts in the Degradation of Methyl Orange
3.4 Effect of Operating Parameters
3.4.1 Effect of Hydrogen Peroxide
3.4.2 Effect of Sodium Bicarbonate
3.4.3 Effect of Catalyst Dose
3.4.4 Effect of Solution pH
3.4.5 Influence of Anions
3.4.6 Role of Bicarbonate in Controlling Catalyst Leaching
3.5 Stability and Life of CoMgAl-Na-Y Supported Catalyst in Fixed Bed Glass Reactor
3.6 Mechanistic Study for the Presence of Main Reactive Oxygen Species(ROS)
3.7 Conclusion
References
4 Effect of Cu on Promoting the Catalyst Activity of CoMgAl LDH BasedCatalyst Using Chlorophenols as Target Compounds
4.1 Experimental Section
4.1.1 Chemical and Reagents
4.1.2 Preparation of Powdered Catalyst for Bench Experiments
4.1.3 Catalyst Characterization Techniques
4.1.4 Degradation and Analysis of CPs (chlorophenols) During Bench Expeirment
4.1.5 Procedure for Monitoring the Stability of the Powdered Catalyst
4.2 Results and Discussion
4.2.1 Catalyst Characterization
4.3 Catalytic Performance
4.3.1 Influence of Different Metals on the Activity of MgAl Based Catalyst
4.3.2 Effect of Cu on Promotion CP Degradation with CuCoMgAl Catalyst Derived from CoMgAl Based LDH Catalyst
4.3.3 Redox Properties of CuCoMgAl Catalyst
4.3.4 Stability of CuCoMgAl Catalyst
4.3.5 Activity of CuCoMgAl Catalyst in Bicarbonate Activation of Hydrogen Peroxide System
4.3.6 Effect of CP Concentration on the Activity of the Catalyst...115
4.3.7 Effect of H_2O_2 on the Degradation of 4-Chlorophenol
4.3.8 Effect of Bicarbonate on the Degradation of 4-CP
4.3.9 Effect of Temperature on the Degradation of 4-CP
4.3.10 Effect of Solution pH on Degradation of CP
4.3.11 Activity of Catalyst for Other Organic Compounds
4.4 Mechanistic Study
4.4.1 Detection of Free Radicals
4.4.2 Possible Reaction Mechanism
4.5 Conclusion
References
5 Project Summary and Future Out Look
5.1 Project Summary
5.2 Future Out Look
Acknowledgement
List of Articles Published During PhD
【參考文獻(xiàn)】：
期刊論文
[1]Novel Co-Mg-Al-Ti-O catalyst derived from hydrotalcite-like compound for NO storage/decomposition[J]. Jie Cheng, Xiaoping Wang, Chunyan Ma , Zhengping Hao Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.. Journal of Environmental Sciences. 2012(03)
[2]Evaluation of media for simultaneous enumeration of total coliform and Escherichia coli in drinking water supplies by membrane filtration techniques[J]. FIESSEL Wanda. Journal of Environmental Sciences. 2008(03)
本文編號(hào)：3329353
【文章來(lái)源】：華中科技大學(xué)湖北省 211工程院校 985工程院校 教育部直屬院校
【文章頁(yè)數(shù)】：155 頁(yè)
【學(xué)位級(jí)別】：博士
【文章目錄】：
摘要
Abstract
1 Introduction
1.1 Water Pollution
1.2 Water Pollution with Organic Compounds
1.3 Conventional Technologies and Water Pollution
1.4 Advanced Oxidation Process (AOPs)
1.4.1 Catalytic Wet Hydrogen Peroxide Oxidation (CWPOs) Appeared to be the Best Solution
1.4.2 Application and Limitations of Fenton's Based Technology in Waste Water Treatment
1.4.3 Need for Searching an Alternative of Fenton's like Reagent in Waste Water Treatment
1.4.4 Application of Heterogeneous Catalyst in the Treatment of Wastewater
1.5 Hydrotalcite Based Supported Catalyst
1.5.1 Structure of Hydrotalcite
1.5.2 Layered Double Hydrotacites as Catalyst
1.5.3 Metals Exchanged Zeolites Based Supported Catalyst
1.6 Challenges in Catalytic Waste Water Treatments
1.7 Bicarbonate Activation of Hydrogen Peroxide system (BAP)
1.7.1 Role of Bicarbonate Activation of Hydrogen Peroxide (BAP) in Wastewater (M/HCO_3~-/H_2O_2 system)
1.7.2 Future of BAP System in the Development of Green Treatment System
1.8 Target Strategy and Content
1.9 Research Aim and Conclusion
References
2 Degradation of Chlorophenols by Supported Co-Mg-Al LDH BasedCatalyst in BAP System
2.1 Experimental Section
2.1.1 Chemicals and Reagents
2.1.2 Preparation of Powdered Catalyst for Bench Experiments (CoMgAl-HTs and MgAl-HTs)
2.1.3 Preparation of Supported Catalyst for Fixed Bed Experiments (CoMgAl-SHTs)
2.1.4 Pollutants Degradation in Bench Test Experiments
2.1.5 Pollutants Degradation in Fixed Bed Experiments
2.1.6 Analyses
2.2 Results and Discussion
2.2.1 Characterization of powdered catalysts
2.2.2 Activity of Catalyst/HCO_3~-/H_2O_2 System on Bench Level
2.3 Mechanistic Discussions
2.4 Application of Catalyst in Fixed Bed Reactor
2.5 Conclusions
References
3 Controlled Leaching with Prolonged Activity for Co-LDH SupportedCatalyst during Treatment of Organic Dyes Using BAP System
3.1 Experimental section
3.1.1 Chemical and Reagents
3.1.2 Preparation of Powdered Catalyst for Bench Expeirments (CoMgAl-HTs andMgAI-HTs)
3.1.3 Preparation of Catalyst for Fixed Bed
3.1.4 Degradation of Methylene Orange and Methylene Blue in Bench Experiment
3.1.5 Degradation of Methylene Blue in Fixed Bed Experiments
3.1.6 Procedure of Analysis
3.2 Result and Discussion
3.2.1 Catalyst Characterizations
3.3 Catalytic Performance of CoMgAl Catalysts in the Degradation of Methyl Orange
3.4 Effect of Operating Parameters
3.4.1 Effect of Hydrogen Peroxide
3.4.2 Effect of Sodium Bicarbonate
3.4.3 Effect of Catalyst Dose
3.4.4 Effect of Solution pH
3.4.5 Influence of Anions
3.4.6 Role of Bicarbonate in Controlling Catalyst Leaching
3.5 Stability and Life of CoMgAl-Na-Y Supported Catalyst in Fixed Bed Glass Reactor
3.6 Mechanistic Study for the Presence of Main Reactive Oxygen Species(ROS)
3.7 Conclusion
References
4 Effect of Cu on Promoting the Catalyst Activity of CoMgAl LDH BasedCatalyst Using Chlorophenols as Target Compounds
4.1 Experimental Section
4.1.1 Chemical and Reagents
4.1.2 Preparation of Powdered Catalyst for Bench Experiments
4.1.3 Catalyst Characterization Techniques
4.1.4 Degradation and Analysis of CPs (chlorophenols) During Bench Expeirment
4.1.5 Procedure for Monitoring the Stability of the Powdered Catalyst
4.2 Results and Discussion
4.2.1 Catalyst Characterization
4.3 Catalytic Performance
4.3.1 Influence of Different Metals on the Activity of MgAl Based Catalyst
4.3.2 Effect of Cu on Promotion CP Degradation with CuCoMgAl Catalyst Derived from CoMgAl Based LDH Catalyst
4.3.3 Redox Properties of CuCoMgAl Catalyst
4.3.4 Stability of CuCoMgAl Catalyst
4.3.5 Activity of CuCoMgAl Catalyst in Bicarbonate Activation of Hydrogen Peroxide System
4.3.6 Effect of CP Concentration on the Activity of the Catalyst...115
4.3.7 Effect of H_2O_2 on the Degradation of 4-Chlorophenol
4.3.8 Effect of Bicarbonate on the Degradation of 4-CP
4.3.9 Effect of Temperature on the Degradation of 4-CP
4.3.10 Effect of Solution pH on Degradation of CP
4.3.11 Activity of Catalyst for Other Organic Compounds
4.4 Mechanistic Study
4.4.1 Detection of Free Radicals
4.4.2 Possible Reaction Mechanism
4.5 Conclusion
References
5 Project Summary and Future Out Look
5.1 Project Summary
5.2 Future Out Look
Acknowledgement
List of Articles Published During PhD
【參考文獻(xiàn)】：
期刊論文
[1]Novel Co-Mg-Al-Ti-O catalyst derived from hydrotalcite-like compound for NO storage/decomposition[J]. Jie Cheng, Xiaoping Wang, Chunyan Ma , Zhengping Hao Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.. Journal of Environmental Sciences. 2012(03)
[2]Evaluation of media for simultaneous enumeration of total coliform and Escherichia coli in drinking water supplies by membrane filtration techniques[J]. FIESSEL Wanda. Journal of Environmental Sciences. 2008(03)
本文編號(hào)：3329353
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