载镍和镍锌炭气凝胶的制备及其脱硫性能的研究

发布时间：2018-01-13 20:36

本文关键词：载镍和镍锌炭气凝胶的制备及其脱硫性能的研究　出处：《上海应用技术学院》2015年硕士论文　论文类型：学位论文

【摘要】：燃油中的噻吩类有机硫燃烧可造成严重的空气污染,并易使车辆尾气处理催化剂失活,燃油深度脱硫是燃油净化提质的热点研究方向。本文采用Ni原位负载法和后负载法制备了载镍炭气凝胶以及载Ni/ZnO双金属炭气凝胶,并研究了所制备材料的孔结构和活性组分的微观结构及常温静态／动态脱硫和高温临氢脱硫性能。结果表明：所制备的负载金属炭气凝胶凝胶为中孔结构；原位负载镍的炭气凝胶静态脱硫效果较差,后负载Ni/ZnO炭气凝胶静态脱硫随着负载金属浓度提升而下降。动态脱硫表明后负载镍的炭气凝胶在脱硫时主要以微孔吸附脱硫为主,后负载Ni/ZnO双金属炭气凝胶中金属组分有堵孔现象而导致吸附容量下降。Ni/ZnO双金属炭气凝胶高温临氢脱硫效果突出,出口硫浓度小于10ppm时,随着双金属负载量的增加,硫吸附容量从18.1增加到25.3mgS/g-吸附剂,但金属的利用率从40降为19.66%,总吸附容量超过理论值的两倍,表明存在催化加氢脱硫的贡献。该材料体系的高温临氢化学吸附脱硫性能与目前工业所用的S-zorb技术十分相近。
[Abstract]:The combustion of thiophene organic sulfur in fuel oil can cause serious air pollution and deactivate the catalyst for vehicle exhaust treatment. Deep desulfurization of fuel oil is a hot research direction in fuel purification and upgrading. In this paper, nickel loaded carbon aerogels and Ni/ZnO loaded bimetallic carbon aerogels were prepared by Ni in situ loading method and after loading method. The pore structure and the microstructures of active components and the properties of static / dynamic desulfurization at room temperature and hydrodesulfurization at elevated temperature were studied. The results showed that the supported metal carbon aerogels were mesoporous. The static desulfurization effect of carbon aerogels loaded with nickel in situ is poor. The static desulfurization of post-loaded Ni/ZnO carbon aerogels decreased with the increase of metal concentration. Dynamic desulphurization showed that the carbon aerogels loaded with nickel were mainly microporous desulfurized. The adsorption capacity of Ni/ZnO bimetallic carbon aerogels was decreased due to the plugging of metal components. The hydrogen desulfurization effect of Ni / ZnO bimetallic carbon aerogels at high temperature was outstanding. When the export sulfur concentration is less than 10 ppm, the adsorption capacity of sulfur increases from 18.1 to 25.3 mg S / g-adsorbent with the increase of bimetallic loading. However, the utilization ratio of metals decreased from 40 to 19.66 and the total adsorption capacity was more than twice the theoretical value. It is shown that there is a contribution of catalytic hydrodesulfurization, and the catalytic hydrodesulfurization performance of the system is very close to that of S-zorb technology used in industry.
【学位授予单位】：上海应用技术学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ427.26;TE624.55

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