共查询到18条相似文献,搜索用时 62 毫秒
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柴油氧化脱硫技术研究进展 总被引:2,自引:0,他引:2
介绍了近年来柴油脱硫技术研究的进展情况,主委包括过氧化氢氧化脱硫、氧气催化氧化脱硫、超声波氧化脱硫和光化学氧化脱硫。分析了不河方法的优势及应用现状,与加氢脱硫技术相比,氧化脱硫将成为今后生产超低硫柴油的主要工艺之一。 相似文献
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国内外柴油氧化脱硫技术研究进展 总被引:3,自引:0,他引:3
介绍了国内外柴油产品质量与标准的发展趋势,以及国内外柴油氧化脱硫技术的研究进展,各种柴油氧化脱硫技术的优势及存在的问题,与加氢脱硫技术相比,氧化脱硫将成为今后生产超低硫柴油的主要工艺之一。 相似文献
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柴油氧化脱硫技术新进展 总被引:1,自引:0,他引:1
柴油低硫化及其含硫标准的日趋严格,是世界各国柴油产品质量与标准的发展趋势。加氢脱硫技术生产低硫柴油,存在投资大、操作费用高和操作条件苛刻的缺点,导致柴油成本大幅攀升,柴油氧化脱硫技术已成为研究热点。综述了国内外柴油氧化脱硫技术的研究进展,认为柴油氧化脱硫技术将成为今后生产超低硫清洁柴油的主要工艺之一。 相似文献
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通过H2O2/HCOOH体系对柴油选择性氧化脱硫技术的研究。考察了H2O2/HCOOH体系反应温度、反应时间、剂油比等因素对氧化脱硫效果的影响。实验结果表明,温度为60℃,反应时间为30min,剂油比为1:15,在反应进行到25min时加入相转移催化剂脱硫率达最大,油脱硫率可达90.0%。 相似文献
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采用双氧水-甲酸对重油催化裂化柴油进行氧化,然后使用N,N-二甲基甲酰胺萃取剂萃取脱硫。研究了在反应体系中氧化时间、氧化温度以及双氧水与甲酸的加入量对氧化脱硫率的影响,并考察了加入分散剂Span-80的效果。最终得到双氧水-甲酸-Span-80体系最佳氧化条件:分散剂Span-80为2.0%,双氧水为36%,甲酸为32%,氧化温度为60 ℃,氧化时间为50 min。分散剂Span-80的加入可以大大提高双氧水-甲酸体系对重油催化裂化柴油的氧化脱硫能力。在双氧水-甲酸体系最佳条件下氧化萃取脱硫率为85.58%,双氧水-甲酸-Span-80体系脱硫率高达98.27%,重油催化裂化柴油的硫含量由12 500 mg/L降至216 mg/L。气相色谱结果显示,氧化脱硫后重油催化裂化柴油中的噻吩、苯并噻吩及其衍生物基本被脱除,有少量二苯并噻吩及其衍生物需要进一步脱除。 相似文献
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柴油添加剂聚甲氧基二甲醚的合成研究进展 总被引:13,自引:0,他引:13
聚甲氧基二甲醚(PODE)作为柴油添加剂能够有效减少燃烧时烟尘的形成,并且具有优良的化学性质,是目前世界公认的清洁环保型燃油组分。综述了近年来国内外聚甲氧基二甲醚的合成方法及研究现状,分析总结了目前各种合成方法存在的一些问题,并展望了聚甲氧基二甲醚作为柴油添加剂的应用前景。 相似文献
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Marko Muzic Katica Sertic-Bionda Zoran Gomzi Stefica Podolski Sanda Telen 《Chemical Engineering Research and Design》2010
Removal of sulfur from diesel fuel by adsorption on a commercial activated carbon and 13X type zeolite was studied in a batch adsorber. Kinetic characterization of the adsorption process was performed applying Lagergren's pseudo-first order, pseudo-second order and intraparticle diffusion models using data collected during experiments carried out to determine the sulfur adsorption dependency on time. The experiments investigating adsorption efficiency regarding initial sulfur concentration were also performed and the results were fitted to Langmuir and Freundlich isotherms, respectively. Activated carbon Norit SXRO PLUS was found to have much better adsorption characteristics. The process of sulfur adsorption on the fore mentioned activated carbon was further studied by statistically analyzing data collected during experiments which were carried out according to three-factor two-level factorial design. Statistical analysis involved the calculation of effects of individual parameters and their interactions on sulfur adsorption and the development of statistical models of the process. 相似文献
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研究了活性炭催化氧化脱除汽油和柴油中噻吩类硫化物的选择性。采用气相色谱-硫化学发光检测器(GC-SCD)分析了汽油和柴油中噻吩类硫化物的分布及浓度;以活性炭作为催化剂,以30%过氧化氢溶液为氧化剂,在甲酸存在条件下考察了汽油和柴油中噻吩类硫化物催化氧化脱除的选择性,讨论了硫化物中硫原子电子密度对硫化物氧化选择性的影响。结果表明:汽油中噻吩类硫化物主要有噻吩(T)及其烷基衍生物(T alkylated derivatives)和苯并噻吩(BT);而柴油中噻吩类硫化物主要分布有苯并噻吩(BT)及其烷基衍生物(BT alkylated derivatives)和二苯并噻吩(DBT)及其烷基衍生物(DBT alkylated derivatives);硫原子电子密度大于5.716的含3个C烷基噻吩(C3-T)、BT、BT alkylated derivatives、DBT 和DBT alkylated derivatives 能被催化氧化脱除,硫原子的电子密度越大,其被氧化的速率越快,被脱除的选择性也越大;被脱除选择性顺序为:DBT alkylated derivatives > DBT > BT alkylated derivatives> BT> C3-T;然而硫原子电子密度小于5.716的T,含1个烷基噻吩(C1-T)和含2个C烷基噻吩(C2-T)则不能被氧化脱除。采用此方法,能将初始硫浓度为1200 μg8226;g-1的柴油降低至小于10 μg8226;g-1,可将初始硫浓度为320 μg8226;g-1的汽油降低至155 μg8226;g-1。 相似文献
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Lei Dong Xiong Dai Chong Peng Cuiting Yang Guoqing Li Shibin Chen Guang Miao Jing Xiao 《American Institute of Chemical Engineers》2022,68(2):e17493
In this work, the effective ultra-deep catalytic adsorptive desulfurization (CADS) using titanium-silica gel (Ti-SG) adsorbent at low Ti loading (<1 wt.%) was investigated. The superior CADS capacity (37.3 mg-S/g-A) and high TOF value (432 h−1) for dibenzothiophene (DBT) of Ti-SG adsorbent were achieved at Ti loading of 0.6% with high dispersion and low titanium coordination. The rate equation of catalytic DBT oxidation was described as , where the TiOOR was determined as the intermediate to enable the DBT oxidation to form the corresponding sulfone (DBTO2). The effectiveness of CADS using Ti-SG adsorbents was verified in real diesels with varied sulfur concentrations and O/S ratios in the dynamic adsorption and multicycle regeneration. This work provides insights on using low-cost bifunctional catalytic adsorbents at low Ti loadings for effective CADS to realize ultra-deep desulfurization of transportation fuels. 相似文献
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