共查询到19条相似文献,搜索用时 125 毫秒
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随着环保问题越来越受到世界各国的重视,各国相继推出了高质量的清洁燃料标准。低硫化是柴油清洁利用的发展趋势,研制开发高效稳定的加氢脱硫催化剂是加氢脱硫技术研究的主要方向之一。本文主要阐述了国内外在柴油加氢脱硫方面的研究成果,主要分析了柴油加氢脱硫反应机理、柴油加氢脱硫催化剂的主催化剂、助剂和载体的研究进展。分析表明,柴油加氢脱硫的主要路径是直接脱硫和加氢路径,而柴油中受空间位阻影响大的4.6-二甲基二苯并噻吩的脱除路径主要是加氢路径和烷基转移路径。文章从柴油加氢脱硫催化剂的组成和结构分析了催化剂的加氢脱硫机理,得到加氢脱硫活性与催化剂的表面微观结构紧密相关。分析了近年来催化剂载体的研究进展,发现柴油加氢脱硫催化剂的载体主要是氧化铝及改性的氧化铝。 相似文献
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柴油深度加氢脱硫技术进展 总被引:1,自引:1,他引:0
随着世界各国对环保法规的日益关注,运输燃料深度脱硫技术在世界范围内受到广泛的研究。近年来,柴油深度脱硫化技术已受到西方国家的普遍重视。在工业上,加氢工艺是应对产品低硫化最有效的途径。柴油深度脱硫的关键是对反应活性最低的4,6-二甲基苯并噻吩类化合物中硫原子的脱除。本文综述了近年来柴油深度加氢脱硫技术的基本原理、超低硫柴油的催化及工艺的研究进展。 相似文献
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以Y改性载体Z-1、Z-2、Z-3担载钼镍钨活性组分,制备了深度加氢脱硫催化剂CL-01、CL-02和CL-03,并进行了相关评价对比试验。结果表明:以Z-3制备的催化剂CL-03活性最佳;与工业剂R-1相比,催化剂CL-03具有更高的脱硫氮活性,其在反应温度360℃,体积空速3 h-1,氢油比250∶1,压力4 MPa条件下的相对脱硫活性为136.9%,相对脱氮活性为147.2%。在考察范围内,催化剂CL-03脱硫率最高达99.87%,产品硫含量7.6μg·g-1,满足柴油国V的硫含量标准。 相似文献
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介绍了目前加氢脱硫催化剂载体的种类和研究现状,包括氧化物载体、介孔分子筛载体、活性炭载体、酸碱载体等。分析了不同载体所具有的的优缺点,并展望了未来载体的研究方向。 相似文献
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Xiaofeng Zhou Bo Wang Shaotong Song Aijun Duan Zhen Zhao Yanjun Gong Chunming Xu Kebin Chi 《Journal of Porous Materials》2017,24(4):941-946
High surface area aluminum containing spherical mesocellular silica foams (SMCFs) with ultra-large pore volume and 3D pore size were successfully synthesized through a simple hydrothermal route, and the as-synthesized aluminum containing SMCFs (Al-SMCFs) was applied as the support of NiMo-base catalyst for the hydrodesulfurization (HDS) of fluid catalytic cracking (FCC) diesel. The as-synthesized supports and corresponding catalysts were characterized by powder small X-ray diffraction, nitrogen physisorption, scanning electron microscopy, transmission electron microscopy (TEM), inductively coupled plasma optical emission spectroscopy, and temperature-programmed reduction with H2. The characterization results showed that, compared with other prepared catalysts (NiMo/Al-SBA-15 and NiMo/Al-KIT-6), the NiMo/Al-SMCFs catalyst possessed the most optimal physicochemical parameters, i.e., ultra-large 3D pore size (42.0 nm), high surface area (330.1 m2·g?1), and ultra-large pore volume (1.96 cm3·g?1), resulting in the formation of more homogeneous distribution of octahedral Mo active species and good mass transfer performance. Consequently, the NiMo/Al-SMCFs catalyst displayed the outstanding HDS performance (98.8%) of FCC diesel, confirming that the Al-SMCFs may be a type of promising candidate for oil hydrotreating. 相似文献
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A series of hydrodesulfurization (HDS) NiMo catalysts supported on Al2O3-NY (denoted as ANY) composites with various amounts of nanosized H-type Y zeolite (denoted as NY) were prepared. The samples were characterized by XRD, BET, TPD, TPR, HRTEM, and FT-IR spectroscopy of pyridine adsorption. The characterization results showed that, compared with NiMo/Al2O3, the addition of NY reduced the Metal-support interaction and made the MoS2 stacking degree higher, slabs shorter and dispersion of edge and corner Mo atoms bigger. The addition of NY also enhanced the overall acidity and the ratio of Brönsted acid to Lewis acid of these catalysts. The fluidized catalytic cracking (FCC) diesel HDS activity was increased with the addition of NY in these catalysts compared with NiMo/Al2O3 catalysts. The optimal NY content was found to be 20 wt% in ANY composite support. The highest HDS activity of NiMo/ANY20 was attributed to the synergy of hydrogenation activity, acid amount and textural properties. 相似文献
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Aijun Duan Chengyin Wang Zhen Zhao Zhangfa Tong Tianshu Li Huadong Wu Huili Fan Guiyuan Jiang Jian Liu 《Journal of Porous Materials》2013,20(5):1195-1204
Novel hierachically porous material Beta-MCM-48 was successfully synthesized from Beta zeolite seeds by two-step hydrothermal crystallization method using Cetyltrimethylammonium Bromide as the mesostructure directing agent. Beta-MCM-48 composite synthesized at the optimization conditions possessed Beta microporous structure and cubic Ia $ \overline{ 3} $ 3 ¯ d mesoporous structure simultaneously. Meanwhile, the acidity of Beta-MCM-48 was similar to Beta zeolite and higher than MCM-48 mesoporous material. A series of Al2O3-Beta-MCM-48 supported NiMo catalysts with different Beta-MCM-48 contents were prepared by the incipient-wetness impregnation method. The catalytic performances were evaluated using DaQing Fluid Catalytic Cracking diesel as feedstock in a high pressure microreactor. Hydrodesulfurization results indicated that NiMo/Al2O3-Beta-MCM-48 catalyst exhibited better activities than that of NiMo/Al2O3 traditional catalyst. NiMo/Al2O3-Beta-MCM-48 catalyst obtained the highest activity as the Beta-MCM-48 content in the support was 20 wt %, and the corresponding sulfur content of the hydrotreated product reached to 23.02 μg g?1. 相似文献
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中国石油化工股份有限公司石油化工科学研究院为进一步提高柴油加氢脱硫催化剂性能,降低催化剂成本,增强市场竞争力,成功开发了新型NiMo类柴油超深度加氢脱硫RS-1100催化剂,并进行了工业生产,获得成功应用。中国石油化工股份有限公司济南分公司工业应用结果表明,RS-1100催化剂在较低反应温度下具有较高的脱硫、脱氮活性,能够满足生产国Ⅲ和国Ⅳ标准柴油要求。中国石油化工股份有限公司沧州分公司工业应用结果表明,RS-1100催化剂具有良好的加氢脱硫和加氢脱氮活性,能够满足生产国Ⅲ标准柴油要求,并有进一步提高油品质量的空间。 相似文献
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由于存在空间位阻,二苯并噻吩(DBT)及其烷基化衍生物(Cx-DBT)中的硫原子很难与加氢催化剂接触.因此,作为柴油脱硫的主要工艺,加氢催化对于柴油中的主要有机硫化物DBT和Cx-DBT的脱除率比较低,难以实现深度脱硫.针对硫质量分数为3 358 μg/g的催化柴油,采用加氢脱硫与生物脱硫相结合的办法进行处理后,催化柴油的硫质量分数降低到20μg/g以下,使用气相色谱-原子发射仪对柴油脱硫前后的硫分布进行检测,发现2种工艺的结合能有效地脱除催化柴油组分中绝大多数的DBT和Cx-DBT,显示出良好的应用前景. 相似文献
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Preparation and catalytic performance of modified kaolin clay with big pore for the hydrodesulfurization of diesel 总被引:1,自引:0,他引:1
Guofu Wan Aijun Duan Zhen Zhao Weiqiang Huang Tao Dou 《Journal of Porous Materials》2008,15(2):231-236
A kind of metakaolin materials with big pores was prepared from natural kaolin clays. The prepared metakaolin was introduced
into alumina as composite support for hydrotreating application. A series of nickel–tungsten catalysts (NiO 2.9 wt%, WO3 27.2 wt%) supported on alumina-metakaolin, alumina-titania and bare alumina also were prepared. Electron microprobe analysis
including SEM and TEM, BET and temperature programmed desorption of NH3 were used for the samples characterization. Their hydrodesulfurization (HDS) activity for diesel were evaluated and compared.
The results showed that NiW/alumina-metakaolin had excellent HDS activity and alumina-metakaolin support could be a good candidate
support for hydrotreating catalysts. 相似文献
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在连续流动固定床加氢装置上,考察Co-Mo型催化剂和Ni-W型催化剂在不同操作条件以及不同脱硫深度下的加氢脱硫反应性能。结果表明,两种催化剂对操作压力改变的敏感度不同;在不同的脱硫深度下,对不同的原料油也表现出不同的脱硫活性。 相似文献