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环糊精和水滑石脱除噻吩和硫醇的研究
作 者: 布劳里
导 师: 杨敬一
学 校: 华东理工大学
专 业: 油气储运工程
关键词: β-环糊精 水滑石 硫醇 噻吩 复合金属氧化物
分类号: TE624.55
类 型: 硕士论文
年 份: 2010年
下 载: 40次
引 用: 0次
阅 读: 论文下载
内容摘要
硫醇和噻吩是原油中的主要含硫化合物,它们引起严重的环境污染和加工困难,因此从油品中脱除硫醇和噻吩一直是一个令人感兴趣的问题。本文主要开展萃取法和吸附法脱除硫醇和噻吩的研究。实验结果表明采用β-环糊精(p-CD)作为萃取剂,在30℃、萃取时间25分钟、β-环糊精浓度0.01mol/L、β-环糊精和模型油为1:1的条件下,对硫醇和噻吩的脱除率分别达到25.0%和72.9%。随着萃取时间的增加,硫醇和噻吩的脱除率增加。甲苯的存在对噻吩的脱除有不利影响。合成了一系列Zn2+,Cu2+,Fe3+,La3+,Ni2+离子掺杂的Mg/Al水滑石(HTC)和复合氧化物(CMO)作为吸附剂用于脱除模型油中的硫醇和噻吩。实验结果表明,在30℃、10分钟和剂油比为1:100的条件下,MgAlLa(3:0.6:0.4) HTC和CMO, MgAlCu HTC具有较好的脱除效果。采用SEM, FT-IR, XRD, TG/DTA,碱性和水溶性碱检测法对MgAlLa(3:0.6:0.4) HTC和CMO的结构进行了表征。MgAlLa(3:0.6:0.4) HTC和CMO在30℃、10分钟和剂油比为1:25的条件下,对噻吩的脱除率达到28.5%和29.8%。随着剂油比增加,噻吩脱除率增加。甲苯的存在对噻吩的脱除有不利影响。MgAlLa(3:0.6:0.4) HTC和CMO在30℃、10分钟和剂油比为1:25的条件下,对硫醇的脱除率达到56.1%和62.7%。随着吸附温度、时间和剂油比增加,硫醇脱除率增加。
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全文目录
摘要 5-6 Abstract 6-9 Chapter 1.Introduction 9-19 1.1 Research Purpose and Meaning 9-10 1.2 Type and Distribution of Sulphur Compound in the Crude Oil 10-11 1.2.1 Sulphur Compound Distribution 10 1.2.2 Sulphur Compound Type 10-11 1.3 The Research Progress of Desulphurization Technology on Oil Refinery 11-18 1.3.1 Hydrodesulphurization(HDS) 11-13 1.3.2 Oxidesulphurization(ODS) 13-14 1.3.3 Adsorption Desulphurization(ADS) 14-16 1.3.4 Biodesulfurization(BDS) 16-18 1.4 The Main Content of the Paper 18-19 Chapter 2.Experiment Method 19-24 2.1 Preparation of Hydrotalcite and Composite Metal Oxide Synthesis 19-20 2.2 Characterization of Hydrotalcite and Composite Metal Oxide 20-21 2.2.1 X-ray Powder Diffraction 20 2.2.2 IR 20 2.2.3 TG/DTA 20 2.2.4 SEM 20 2.2.5 Surface Area and Pore Distribution 20 2.2.6 Basic Strength 20 2.2.7 Determination of Water-Soluble Alkali 20-21 2.3 Extraction Experiment Method 21 2.4 Adsorption Experiment Method 21 2.5 Thiophene Content Analysis 21-22 2.6 Propylmercaptan Content Analysis 22-24 Chapter 3.Result and Discussion 24-59 3.1 Removal of Thiophene from Model Oil by β-Cyclodextrin Extraction 24-30 3.1.1 Effect of Extraction Temperatures 25-26 3.1.2 Effect of Extraction Time 26-27 3.1.3 Effect of the Ratio of β-cyclodextrin and Model Oil 27-28 3.1.4 Effect of Extraction Concentration of β-Cyclodextrin 28-29 3.1.5 Effect of Toluene 29-30 3.1.6 Summary 30 3.2 Removal of Propylmercaptan from Model Oil by β-Cyclodextrin Extraction 30-36 3.2.1 Effect of Extraction Temperature 30-31 3.2.2 Effect of Extraction Time 31-32 3.2.3 Effect of the Ratio of β-cyclodextrin and Model Oil 32-33 3.2.4 Effect of the Concentration of β-cyclodextrin 33-34 3.2.5 Removal of Propylmercaptan and Thiophene from Model Oil 34-36 3.2.6 Summary 36 3.3 Removal of Thiophene by Hydrotalcite and Composite Metal Oxide Adsorption 36-51 3.3.1 Thiophene removal efficiency by hydrotalcites and composite metal oxide 37-38 3.3.2 Structure and composition of MgAlLa hydrotalcite and composite metal oxide 38-44 3.3.3 Effect of Adsorption Time by hydrotalcite 44-45 3.3.4 Effect of Adsorption Temperature by Hydrotalcite 45-46 3.3.5 Effect of Adsorbent-oil Ratio by Hydrotalcite 46-47 3.3.6 Effect of Adsorption Time by Composite Metal Oxide 47-48 3.3.7 Effect of Adsorption Temperature by Composite Metal Oxide 48-49 3.3.8 Effect of Adsorbent-oil Ratio by Composite Metal Oxide 49-50 3.3.9 Effect of Toluene for Thiophene Removal Efficiency by Hydrotalcite 50 3.3.10 Summary 50-51 3.4 Removal of Propylmercaptan by Hydrotalcite and Composite Metal Oxide 51-59 3.4.1 Effect of Adsorption Time by Hydrotalcite 51-52 3.4.2 Effect of Adsorption Temperature by Hydrotalcite 52-53 3.4.3 Effect of Adsorbent-oil Ratio by Hydrotalcite 53-54 3.4.4 Effect of Adsorption Time by Composite Metal Oxide 54-55 3.4.5 Effect of Adsorption Temperature by Composite Metal Oxide 55-56 3.4.6 Effect of Adsorbent-oil Ratio by Composite Metal Oxide 56-57 3.4.7 Summary 57-59 Chapter 4 Conclusion 59-61 References 61-66 Gratefulness 66
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