【作者】 王建成；

【导师】 谢克昌； 米杰；

【作者基本信息】 太原理工大学 ， 化学工艺， 2004， 硕士

【摘要】 煤炭在我国一次能源生产和消费构成中均占2／3以上，而且在今后相当长时间内不会改变。煤炭利用过程中硫排放造成严重的环境污染，因此开发一种温和的煤燃前脱硫技术是十分必要的。 本实验选取北京、王庄、兖州、临汾、义马和大同六种高硫煤，在超声波和微波的作用下，分别考察了有机溶剂萃取和无机氧化两种体系煤中有机硫的脱除效果。 超声波和微波联合萃取脱硫，以四氯乙烯为萃取剂，考察了超声波作用时间和超声波功率对脱硫率的影响。通过气相色谱和质谱联用(GC-MS)和红外光谱(FⅡR)的分析结果，进一步探讨了萃取脱硫的机理。 超声波和微波辅助氧化脱硫，选用二氧化锰溶液、三氯化铁溶液和过氧乙酸三种溶液作为氧化剂，考察不同的脱硫效果，结合XRD、粒度分析等测试结果对氧化脱硫机理也进行了探讨。 通过分析实验结果得出以下结论： 1．超声波和微波联合联合四氯乙烯萃取可以明显脱除煤中的有机硫，是一种比较温和的原煤脱硫方法，常规的四氯化碳抽提只用在较高的温度下，才能脱除煤中的有机硫。而超声波辐照时的最高温度约80℃，再由于微波选择性加热的特点，处理后的煤质物性(热值等)没有发生较大的变化。 2．超声波作用时间对煤的脱硫率有较大影响，随超声波辐照时间的延长脱硫率基本上是呈上升趋势。 3．GC—MS和红外光谱的分析结果表明：四氯乙烯萃取不仅太原理工大学硕士生学位论文脱除煤中含硫的有机物，而且还可以萃取脱除较多的含氮和多环芳烃等物质。 4.超声波和微波可以有效地联合过氧乙酸氧化脱除煤中的无机硫和有机硫组分。 5.通过对比单独利用超声波、超声波和微波结合两种方法的实验结果，微波对脱除北京、王庄、充州和临汾四种煤样中的有机硫，起到了较大的辅助作用。 6.微波和过氧乙酸结合可以有效地脱除煤中的有机硫，并且随微波辐照时间的延长，脱硫率基本呈现了上升趋势。 7.比较的脱硫效果，不同煤样在萃取和氧化两种体系，有机硫脱除的难易程度是一致的，从易到难排序都是:王庄>北京>I启汾>充州，所以不同煤种中硫的脱除的难易程度和煤中硫的存在形态有关。更多还原

【Abstract】 In China, Coal occupies above 2/3 in the primary energy production and consume. With the development of Chinese economics, the quantity of consuming energy will improve strongly. The polluted problem caused by the SOX emission during the course of coal burning is more and more serious, so it is urgent that finding a mild technology would be used to remove sulphur in coal sufficiently.In the thesis, six kinds of high sulfur coals from Beijing, Wangzhang, Yanzhou, Linfen, Yima and Datong were selected, the effect of raw coal desulphurization was investigated by organic solvent extraction and inorganic oxidation process under ultrasonic and microwave irradiation.The high sulfur coal was treated by organic solvent under ultrasonic or microwave field. The influence of treating conditions, including the size of coal, extraction time and ultrasonic power on the rate of desulphurization was studied. Tetrachloroethylene Filtrate was consentrated. Analyzing the results of GC-MS and FIIR experiments, the desulphurization mechanism by extraction was discussed.The high sulfur coal was treated in three different oxidants( MnO2 solution, FeCl3 solution, acetic acid and hydrogen peroxide solution)under ultrasonic and microwave radiation. The coals were analyzed by XRD, particle size analyzer and so on. Last, the oxidated desulphurization mechanism was investigated.The conclusions were drawn from experimental rasults:1. Tetrachloroethylene extraction can remove organic sulfur sufficiently, and it is a quite a mild desulphurization technology. It is obvious that the effect of ultrasonic and microwave action on the rate of desulphurization. Routine extraction can remove sulfur in coal under the quite high temperature; The highest temperature is 80 癈 under the ultrasonic field and the heating trait of the microwave, so the quality of desulphurization coal didn’t change a lot.2. The rate of desulphurization increase with the ultrasonic time.3. The results of GC-MS and FIIR experments show: tetrachloroethylene extraction can not only remove sulfur in coal but also extract quite a few contained-nitrogen and aromatic compounds.4. The rate of organic and inorganic sulphur removal can be promoted by treated in acetic acid and hydrogen peroxide oxidation under ultrasonic and microwave radiation.5. Comparing the experimental results under single ultrasonic action with the combination ultrasonic and microwave, it is obvious that the action of microwave increases the rate of desulphurization.6. The organic sulphur can be removed by treated in aceticacid and hydrogen peroxide oxidation under microwave radiation and the rate of desulfurizaiton increases with the increasing treatment time.7. Comparing the extraction and oxidization two different systems, the organic sulphur were removed by the two different way, the order was same, from easy to difficult, Wangzhuang >Beijing > Linfen > Yanzhou. The order maybe results from the different sulphur forms in coal.更多还原