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composed of deep eutectic solvents and metal-modified MCM-41 particles as multifunctional promoters for fueloil desulfurization

《化学科学与工程前沿（英文）》 2023年第17卷第11期页码 1776-1787 doi: 10.1007/s11705-023-2314-z

摘要： Compared with traditional hydrodesulfurization, new nonhydrodesulfurization methods have the advantage of a high removal efficiency for thiophene compounds under mild conditions. However, independent nonhydrodesulfurization technologies are faced with their own shortcomings, such as limitations of the desulfurization performance and regeneration of materials. To overcome these limitations, four nanofluids were prepared by dispersing different metal-modified MCM-41 particles in deep eutectic solvent as multifunctional promoters to develop a comprehensive desulfurization method. Based on the excellent adsorbability and high catalytic activity of the dispersed particles and the outstanding extractability of deep eutectic solvent in nanofluids, a high sulfur removal of 99.33% was achieved for model oil under mild conditions in 15 min. The nanofluids also showed excellent reusability due to their high structural stability. In addition, NF@Cu/Al-MCM-41-2.5% exhibited the best desulfurization performance among the prepared nanofluids. This result was obtained because the introduction of Al ions increased the number of acid sites and defect sites to improve the catalytic activity and adsorbability, and the best affinity of Cu/Al-MCM-41 for the deep eutectic solvent favored the reaction mass transfer. This work opens the door to the development of a comprehensive nonhydrodesulfurization method based on the design of nanofluid materials.

关键词： fuel oil desulfurization nanofluids catalytic ozonation

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Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study

Chuanzhu LU,Hui FU,Huipeng LI,Hua ZHAO,Tianfeng CAI

《化学科学与工程前沿（英文）》 2014年第8卷第2期页码 203-211 doi: 10.1007/s11705-014-1420-3

摘要： ZSM-5/SBA-15 composite molecular sieves were synthesized using post-synthesis method and characterized by X-ray diffraction and N adsorption-desorption. The oxidative-extration desulfurization of model oil was investigated by using hydrogen peroxide as the oxidant, tetrabutyl ammonium bromide as phase transfer catalyst, dimethyl sulfoxide as extractant, and Zr-ZSM-5/SBA-15, Ag-ZSM-5/SBA-15, Ce-ZSM-5/SBA-15 as catalyst. Under the optimal conditions, the desulfurization rate decreases in the order: Zr-ZSM-5/SBA-15>Ce-ZSM-5/SBA-15>Ag-ZSM-5/SBA-15. The highest desulfurization rate is 84.53% under the catalysis of Zr-ZSM-5/SBA-15. Kinetics analysis shows that the reaction is pseudo-first-order with the activation energy of 44.23 kJ/mol.

关键词： composite molecular sieve oxidation desulfuration extraction kinetic

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Extractive desulfurization of model fuels with a nitrogen-containing heterocyclic ionic liquid

《化学科学与工程前沿（英文）》 2022年第16卷第12期页码 1735-1742 doi: 10.1007/s11705-022-2167-x

摘要： A nitrogen-containing ionic liquid was synthesized using an aromatic nitrogen-containing heterocyclic and an amino acid, and applied to the extractive desulfurization process to remove benzothiophene, dibenzothiophene, and 4,6-dimethyldibenzothiphene from a model fuel oil. Chemical characterizations and simulation using Gaussian 09 software confirmed the rationality of an ionic liquid structure. Classification of non-covalent interactions between the ionic liquid and the three sulfur-containing contaminants was studied by reduced density gradient analysis. The viscosity of the ionic liquid was adjusted by addition of polyethylene glycol. Under extraction conditions of the volume of ionic liquid to oil as 1:1 and temperature as room temperature, the desulfurization selectivity of ionic liquid followed the order of 4,6-dimethyldibenzothiphene (15 min) < benzothiophene (15 min) ≈ dibenzothiophene (10 min). Addition of p-xylene and cyclohexene to the fuel oil had little effect. The extractant remained stable and effective after multiple regeneration cycles.

关键词： extractive desulfurization nitrogen-containing heterocyclic ionic liquid reduced density gradient analysis desulfurization selectivity

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Study of engine performance, emission and combustion characteristics fueled with diesel-like fuel producedfrom waste engine oil and waste plastics

V. Edwin Geo, Ankit Sonthalia, Fethi Aloui, Femilda Josephin J. S.

《环境科学与工程前沿（英文）》 2018年第12卷第4期 doi: 10.1007/s11783-018-1063-6

摘要：

To derive liquid fuel from waste engine oil and plastics thorough pyrolysis process

To make equal blend of waste engine oil and plastics with diesel fuel

To find the suitability of fuel from waste in diesel engine through performance, emission and combustion characteristics

关键词： Waste engine oil Waste plastic oil Diesel fuel Pyrolysis Compression ignition engine

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Synthesis and characterization of phosphotungstic acid/activated carbon as a novel ultrasound oxidative desulfurization

Liyan LIU, Yu ZHANG, Wei TAN

《化学科学与工程前沿（英文）》 2013年第7卷第4期页码 422-427 doi: 10.1007/s11705-013-1353-2

摘要： Phosphotungstic acid/activated carbon (PTA/AC) catalysts with various AC sizes or PTA content have been synthesized and characterized by N physisorption, X-ray diffraction, Fourier transform infrared spectroscopy and temperature programmed desorption of ammonia. These catalysts were then evaluated in terms of the removal of dibenzothiophene (DBT) by ultrasound-assisted oxidative desulfurization process. The results showed that the DBT conversion obviously increased with the decrease of AC support size and the increase of PTA content. After supporting PTA on AC, the DBT conversion can be improved by 38.9% after ultrasound irradiation for 10 min. In addition, the stability tests of PTA/AC showed that the catalytic oxidative activity of PTA/AC was nearly kept constant after ultrasound irradiation for 20 min, which makes it a promising catalyst to use in ultrasound-assisted oxidative desulfurization process.

关键词： phosphotungstic acid activated carbon ultrasound-assisted oxidative desulfurization

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New nanostructured sorbents for desulfurization of natural gas

Lifeng WANG, Ralph T. YANG

《化学科学与工程前沿（英文）》 2014年第8卷第1期页码 8-19 doi: 10.1007/s11705-014-1411-4

摘要： Desulfurization of natural gas is achieved commercially by absorption with liquid amine solutions. Adsorption technology could potentially replace the solvent extraction process, particularly for the emerging shale gas wells with production rates that are generally lower than that from the large conventional reservoirs, if a superior adsorbent (sorbent) is developed. In this review, we focus our discussion on three types of sorbents: metal-oxide based sorbents, Cu/Ag-based and other commercial sorbents, and amine-grafted silicas. The advantages and disadvantages of each type are analyzed. Possible approaches for future developments to further improve these sorbents are suggested, particularly for the most promising amine-grafted silicas.

关键词： desulfurization natural gas desulfurization hydrogen sulfide sorbent amine-silica sorbent

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Potential hybrid feedstock for biodiesel production in the tropics

Solomon GIWA,Oludaisi ADEKOMAYA,Collins NWAOKOCHA

《能源前沿（英文）》 2016年第10卷第3期页码 329-336 doi: 10.1007/s11708-016-0408-8

摘要： Recently, mixture of different oils at various proportions have been used as feedstock for biodiesel production. The primary aim is to improve fuel properties which are strongly influenced by the fatty acid composition of the individual oil that makes up the feedstock mix. The tropics are renowned for abundant oil-bearing crops of which palm kernel oil (PKO) from palm seed and groundnut oil (GNO) are prominent. This present paper investigated biodiesel production from hybrid oil (HO) of PKO (medium carbon chain and highly saturated oil) and GNO (long carbon chain and highly unsaturated oil) at 50/50 (v/v) blending. The principal fatty acids (FAs) in the HO are oleic (35.62%) and lauric acids (24.23%) with 47.80% of saturated FA and 52.26% of unsaturated FA contents. The chemical conversion of the oil to methyl ester (ME) gave 86.56% yield. Fuel properties of hybrid oil methyl ester (the HOME) were determined in accordance with standard test methods and were found to comply with both ASTM D6751 and EN 14214 standards. The oxidative stability, cetane number and kinematic viscosity (KV) of HOME were observed to be improved when compared with those of GNO methyl ester from single parent oil, which could be accredited to the improved FA composition of the HO. The KV (3.69 mm /s) of HOME obtained in this paper was remarkably low compared with those reported in literature for most biodiesels. This value suggests better flow, atomization, spray and combustion of this fuel. Conclusively, the binary blend of oils can be a viable option to improve the fuel properties of biodiesel feedstock coupled with reduced cost.

关键词： groundnut oil palm kernel oil methyl ester fuel properties tropics fatty acid composition

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Deep desulfurization of diesel fuels by catalytic oxidation

YU Guoxian, CHEN Hui, LU Shanxiang, ZHU Zhongnan

《化学科学与工程前沿（英文）》 2007年第1卷第2期页码 162-166 doi: 10.1007/s11705-007-0030-8

摘要： Reaction feed was prepared by dissolving dibenzothiophene (DBT), which was selected as a model organosulfur compound in diesel fuels, in -octane. The oxidant was a 30 wt-% aqueous solution of hydrogen peroxide. Catalytic performance of the activated carbons with saturation adsorption of DBT was investigated in the presence of formic acid. In addition, the effects of activated carbon dosage, formic acid concentration, initial concentration of hydrogen peroxide, initial concentration of DBT and reaction temperature on the oxidation of DBT were investigated. Experimental results indicated that performic acid and the hydroxyl radicals produced are coupled to oxidize DBT with a conversion ratio of 100%. Catalytic performance of the combination of activated carbon and formic acid is higher than that of only formic acid. The concentration of formic acid, activated carbon dosage, initial concentration of hydrogen peroxide and reaction temperature affect the oxidative removal of DBT. The higher the initial concentration of DBT in the -octane solution, the more difficult the deep desulfurization by oxidation is.

关键词： organosulfur compound performic presence activated hydrogen peroxide

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Catalytic oxidative desulfurization of gasoline using phosphotungstic acid supported on MWW zeolite

Hanlu Wang, Idris Jibrin, Xingye Zeng

《化学科学与工程前沿（英文）》 2020年第14卷第4期页码 546-560 doi: 10.1007/s11705-019-1842-z

摘要： Catalysts for the desulfurization of gasoline samples were synthesized via the immobilization of well-dispersed phosphotungstic acid (HPW) on Mobil composition of matter-twenty-two (MWW) zeolite. Characterization results indicated that these catalysts possess a mesoporous structure with the retention of the Keggin structure of immobilized HPW. Relevant reaction parameters inﬂuencing sulfur removal were systematically investigated, including HPW loading, catalyst dosage, temperature, initial S-concentration, molar ratio of oxidant to sulfide (O/S), volume ratio of MeCN to model oil (Ext./oil), and sulfide species. The 40 wt-% HPW/MWW catalyst exhibited the highest catalytic activity with 99.6% dibenzothiophene sulfur removal from prepared samples. The 40 wt-% HPW/MWW catalyst was recycled four times and could be easily regenerated. Finally, as an exploratory study, straight-run-gasoline and fluid catalytic cracking gasoline were employed to accurately evaluate the desulfurization performance of 40 wt-% HPW/MWW. Our research provides new insights into the development and application of catalysts for desulfurization of gasoline.

关键词： oxidative desulfurization phosphotungstic acid MWW wet impregnation adsorption energy

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清洁燃料生产技术的新进展

李大东,蒋福康

《中国工程科学》 2003年第5卷第3期页码 6-14

摘要：

概述了我国汽、柴油生产特点及质量现状和差距，指明了当今汽、柴油质量发展趋势和清洁燃料生产技术开发应用的原则，简要介绍了我国清洁汽、柴油生产技术的新进展。

关键词：清洁燃料质量标准汽油柴油生产技术进展

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Experimental and DFT insights into nitrogen and sulfur co-doped carbon nanotubes for effective desulfurization

《环境科学与工程前沿（英文）》 2021年第15卷第5期 doi: 10.1007/s11783-021-1397-3

摘要：

• Synthesis of NS-CNTS is used in a high desulfurization performance.

关键词： Dibenzothiophene (DBT) Tertiary methyl mercaptan Adsorption Carbon nano tube (CNT) Desulfurization Doping

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Activity and characteristics of “Oxygen-enriched” highly reactive absorbent for simultaneous flue gas desulfurization

Yi ZHAO,Tianxiang GUO,Zili ZANG

《环境科学与工程前沿（英文）》 2015年第9卷第2期页码 222-229 doi: 10.1007/s11783-014-0636-2

摘要： An “Oxygen-enriched” highly reactive absorbent was prepared by mixing fly ash, lime and a small quantity of KMnO for simultaneous desulfurization and denitrification. Removal of SO and NO simultaneously was carried out using this absorbent in a flue gas circulating fluidized bed (CFB). The highest simultaneous removal efficiency, 94.5% of SO and 64.2% of NO, was achieved under the optimal experiment conditions. Scanning Electron Microscope (SEM) and Accessory X-ray Energy Spectrometer (EDX) were used to observe the surface characteristics of fly ash, lime, “Oxygen-enriched” highly reactive absorbent and the spent absorbent. An ion chromatograph (IC) and chemical analysis methods were used to determine the contents of sulfate, sulfite, nitrate and nitrite in the spent absorbents, the results showed that sulfate and nitrite were the main products for desulfurization and denitrification respectively. The mechanism of removing SO and NO simultaneously was proposed based on the analysis results of SEM, EDX, IC and the chemical analysis methods.

关键词： “Oxygen-enriched” highly reactive absorbent Surface characteristics Flue gas circulating fluidized bed Simultaneous desulfurization and denitrification

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汽油机燃用轻油基燃料的缸内过程参数分析

孙玲玲

《中国工程科学》 2000年第2卷第12期页码 78-83

摘要：

介绍作者开发的一种汽油机用新型燃料，为检验其品质，对发动机缸内过程参数进行了全面测试分析。结果表明：汽油机燃用轻油基混合燃料时无爆震，动力性稍低于燃用汽油，缸内过程参数标准偏差明显低于燃用汽油。这充分说明，所开发的轻油基混合燃料品质优良，适于汽油机使用。

关键词：轻油汽油机缸内过程参数抗爆性

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双氧原子掺杂的氮化硼材料用于吸附脱硫研究 Article

罗静, 魏延臣, 巢艳红, 王超, 李宏平, 熊君, 华明清, 李华明, 朱文帅

《工程（英文）》 2022年第14卷第7期页码 86-93 doi: 10.1016/j.eng.2020.08.030

摘要：

氧原子普遍共存于六方氮化硼（h-BN）吸附剂中。如何利用h-BN中的氧原子以强化其与吸附质之间的相互作用，从而提高材料的吸附性能，是一个亟待解决课题。本文以聚合法构建氧原子晶格内部取代和边缘羟基化修饰的双氧原子位点改性BN（BN‒2O）材料。BN‒2O的边缘羟基氧原子能够增强二苯并噻吩（DBT）与其非均匀表面的π-π作用，从而促进多分子层型吸附过程。实验结果表明，相比边缘羟基取代BN（BN‒OH）材料，BN‒2O材料对燃油中DBT的吸附容量提升了12%。密度泛函理论计算还揭示了BN‒2O晶格内部的氧原子可以通过极化吸附质的方式增强其与BN‒2O之间的偶极作用，进一步提高BN‒2O从富含芳烃的燃油中选择性吸附DBT的能力，使得其在燃油吸附脱硫领域表现出更好的应用前景。吸附结果符合Freundlich模型和准二级动力学模型结果。因此，该聚合法同样可被应用于其他杂原子掺杂体系以提升吸附剂的吸附性能。

关键词：聚合物基合成策略内部取代BN 氧掺杂吸附脱硫