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Efficient aerobic oxidative desulfurization via three-dimensional ordered macroporous tungsten-titanium oxides

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Petroleum Science 2022年第1期19卷 345-353页

作者： Ming Zhang Yu-Jie Fu Chao Wang Yan-Chen Wei Yong-Kang Gao Wen-Shu Yang Lei Fan Wen-Shuai Zhu Hua-Ming Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang212013PR China Institute of Environmental Health and Ecological Security School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang212013PR China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225002PR China

A series of three-dimensional ordered macroporous(3 DOM)W-TiO_(2)catalysts have been prepared through a facile colloidal crystal template *** prepared materials characterized in detail exhibited enhanced catalytic activity in aerobic oxidative desulfurization *** experimental results indicated that the as-prepared materials possessed excellent 3 DOM structure,which is beneficial for the catalytic *** sample 3 DOM W-TiO_(2)-20 exhibited the highest activity in ODS process,and the sulfur removal can reach 98%in 6 ***,the oxidative product was also analyzed in the reaction process.

关键词： Tungsten doped Three-dimensional ordered microporous material Titanium oxide Aerobic oxidative desulfurization sulfur compounds

Volatilization Rate of SnS from Sn-Fe Mattes

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Journal of Materials Science & Technology 1995年第4期11卷 281-286页

作者： HUA, YX LIU, CP Kunmig Inst of Technology Kunming China

The kinetics of volatilization of SnS from Sn-Fe mattes was investigated by using an unique experimental method. A water model test was also carried out for the proper interpretation of the experimental results. It has been demonstrated that the volatilization process displays the first order kinetics with respect to the concentration of SnS in the matte. The process is controlled by the mass transport of SnS in gas phase. The apparent activation energy for the process is 127.4 kJ/mol. The effect of temperature and carrier gas flow rate on the reaction rate was discussed in accordance with the mathematical model developed.

关键词： sulfur compounds

Efficient production of ethyl levulinate from cassava over Al2(SO4)3 catalyst in ethanol–water system

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Journal of Energy Chemistry 2017年第1期26卷 115-120页

作者： Jin Tan Qiying Liu Lungang Chen Tiejun Wang Longlong Ma Guanyi Chen School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Renewable Energy Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640GuangdongChina Guangdong Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640GuangdongChina

One-pot achievement of ethyl levulinate from cassava was conducted in ethanol–water system over several simple sulfate salt catalysts. Al2(SO4)3catalyst had the best performance in synthesizing ethyl levulinate comparing with those of a series of sulfate salts. The highest yields of ethyl levulinate was up to 39.27% as well as 7.78% levulinate acid when cassava was catalyzed in ethanol medium by adding 10 wt% water.13C and1H NMR spectroscopic investigations confirmed that isomerization of glucose to fructose over Al2(SO4)3catalyst is an important step in producing ethyl levulinate and levulinate acid. Due to aggregations of Al3+under hydrothermal conditions, tiny amount of Al3+were detected in filtrate at the percentage of 0.32% even if in absolute water. Brønsted and Lewis acids could improve the yield of ethyl levulinate and levulinate acid by synergistic effect. All results suggested that Al2(SO4)3was a simple and efficient catalyst for ethyl levulinate and levulinate acid production. © 2016 Science Press

关键词： Catalysts Ethanol Plants (botany) sulfur compounds Waterworks

Synthesis, Biological Evaluation, and SAR Studies of Varyingly Substituted 4-Thioflavonols

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Open Journal of Medicinal Chemistry 2022年第2期12卷 15-25页

作者： Rubina Bibi Amina Sadiq Ehsan Ullah Mughal Department of Chemistry Government College Women University Sialkot Pakistan Department of Chemistry University of Gujrat Gujrat Pakistan

A series of 4-thioflavonols compounds were synthesized by treating flavonols with lawsons reagent with variable substituent groups at A, B, and AB rings. All the synthesized compounds were checked for antibacterial and antifungal activity. We report that many compounds were found active against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus, bacterial strains and, C. albicans, C. parapsilosisstrains and C. krusei fungal strains. Most of the synthesized 4-thioflavonols compounds were found to show enhanced antimicrobial activity than respective flavonol compounds.

关键词： Flavonols 4-Thioflavonols Flavonoids Lawsons Reagent Antibacterial Activity Antifungal Activity One Pot Synthesis sulfur compounds SAR Studies

Research on Raman spectrum in liquid core optical fiber of CCl_4 solution

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Chinese Optics Letters 2005年第11期3卷 666-668页

作者：金尚忠冯春媛金永兴张在宣 Institute of Optoelectronics Technology China Jiliang University Hangzhou 310018 Shandong Jiaotong University Ji'nan 250023

The Raman spectrum intensity can be enhanced in liquid core optical fiber （LCOF） of CCl4 solution. We dissolved liquid CCl4 into CS2 and got solutions of different concentrations. There is an optimum concentration at which the maximum Raman intensity can be obtained. There exists an optimum fiber length of 2 m. The experimental result is in good agreement with the theoretical calculation. The Raman intensity becomes powerful with the increase of the pump power and Raman linewidth becomes narrower with the decrease of the CCl4 concentration.

关键词： Carbon tetrachloride Concentration (process) Liquids Optical pumping Solutions sulfur compounds

Ionic Liquid Assisted Extraction of Nitrogen and Sulphur-Containing Air Pollutants from Model Oil and Regeneration of the Spent Ionic Liquid

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Journal of Environmental Protection 2011年第6期2卷 796-802页

作者： Ikenna Anugwom Paivi Maki-Arvela Tapio Salmi Jyri-Pekka Mikkola Industrial Chemistry and Reaction Engineering Process Chemistry CentreAbo Akademi UniversityTurkuFinland Technical Chemistry Department of ChemistryChemical-Biological CenterUmea UniversityUmeaSweden

Removal of air pollutants, such as nitrogen and sulphur containing compounds from a model oil (dodecane) was studied. An ionic liquid (1-ethyl-3-methylimidazolium chloride [C2mim] [Cl]) was used as an extractant. Liquid-liquid extraction by using 1-ethyl-3-methylimidazolium chloride [C2mim] [Cl] was found to be a very promising method for the removal of N- and S-compounds. This was evaluated by using a model oil (dodecane) with indole as a neutral nitrogen compound and pyridine as a basic nitrogen compound. Dibenzothiophene (DBT) was used as a sulphur compound. An extraction capacity of up to 90 wt% was achieved for the model oil containing pyridine, while only 76 wt% of indole in the oil was extracted. The extraction capacity of a model sulphur compound DBT was found to be up to 99 wt%. Regeneration of the spent ionic liquid was carried out with toluene back-extraction. A 1:1 toluene-to-IL wt ratio was performed at room temperature. It was observed that, for the spent ionic liquid containing DBT as a model compound more than 85 wt% (corresponding 3852 mg/kg) could be removed from the oil. After the second regeneration cycle, 86 wt% of the DBT was recovered from the ionic liquid to toluene. In the case of indole as the nitrogen containing species, more than 99 wt%, (corresponding to 2993 mg/kg) of the original indole was transferred from the model oil to the ionic liquid. After the first-regeneration cycle of the spent ionic liquid, 54 wt% of the indole–in-IL was transferred to toluene. Thus, both extractions of nitrogen and sulphur model compounds were successfully carried out from model oil and the back-extraction of these compounds from the ionic liquids to toluene demonstrated the proved the concept of the regeneration point of view.

关键词： Ionic Liquids Extraction Air Pollutants Nitrogen Compound sulfur compounds