用ECODS法对醇基DESs进行燃料脱硫

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.1595/205651324x16964075320630

Nisha Saini, Pooja Yadav, Kuldeep Singh, Prasenjit Ghosh, Rajkumar Singh

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引用次数: 0

摘要

全世界都有一种特别的意识来清洁被污染的环境。环境污染主要是由温室气体、交通燃料排放等造成的。其中，运输燃料排放产生的含硫化合物对环境污染影响较大。它要求从运输燃料中去除这些含硫化合物。炼油厂使用加氢脱硫(HDS)工艺从燃料中减少这些含硫化合物。然而，HDS工艺需要高氢气压力和温度，这使得它具有成本效益。HDS法的另一种替代方法是通过溶剂萃取进行氧化脱硫，这需要低温操作条件。在这方面，深共晶溶剂(DESs)因其低成本的合成方法而受到研究人员的青睐，可以通过溶剂萃取法对运输燃料进行脱硫。本研究以苯基乙酸和水杨酸为氢键受体(HBAs)，四乙二醇为氢键供体(HBD)，摩尔比为1:2合成了DESs。用FTIR光谱对des进行了表征。测定了DESs的物理化学性质，如密度、粘度和折射率。利用合成的DESs从模型燃料和实际柴油中提取有机硫化合物。对模型燃料和柴油进行了氧化研究，然后用合成的DESs进行了溶剂萃取。在温度为30℃、料液比为1.0的条件下，模型燃料对PAA/TTEG(1:2)和SAA/TTEG(1:2)的萃取效率分别为50.16%和38.89%，对柴油的萃取效率分别为38%和37%。PAA/TTEG(1:2)和SAA/TTEG(1:2)经氧化处理后，分别提高到77%、68%和54%、73%。结果表明，在低温30℃条件下，采用萃取剂联合氧化脱硫法(ECODS)， DES PAA/TTEG(1:2)的萃取性能优于SAA/TTEG(1:2)。因此，以SAA和TTEG的摩尔比为1:2合成的DES作为低温脱除燃料中有机硫化合物的萃取溶剂效果较好。

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Desulfurizing Fuels Using Alcohol-Based DESs Using ECODS Method

A special awareness has been given worldwide to clean the polluted environment. The environment is polluted mainly by greenhouse gases, emissions from transportation fuels, etc. Among them, sulfur compounds emitted from the emission of transported fuels significantly impact environmental pollution. It requires the removal of these sulfur compounds from transportation fuels. Refineries use the hydrodesulfurization (HDS) process to reduce these sulfur compounds from fuels. However, the HDS process requires high hydrogen pressure and temperature, making it cost-effective. An alternative to the HDS process is oxidative desulfurization via solvent extraction, which requires low-temperature operating conditions. In this regard, deep eutectic solvents (DESs) are attractive for researchers to desulfurize transportation fuels via solvent extraction due to their low-cost synthesis method. In our study, DESs were synthesized using phenylacetic acid and salicylic acid as hydrogen bond acceptors (HBAs) and tetraethylene glycol as hydrogen bond donor (HBD) in the mole ratio of 1:2. DESs were characterized by using FTIR spectra. Physico-chemical properties of DESs, such as density, viscosity, and refractive Index, were also measured. The synthesized DESs were performed to extract organosulfur compounds from model fuel and actual diesel. An oxidation study was carried out for model fuel and diesel, followed by solvent extraction using these synthesized DESs. The extraction efficiency for PAA/TTEG(1:2) and SAA/TTEG(1:2) was achieved as 50.16% and 38.89% for model fuel at a temperature of 30oC using a solvent to feed ratio of 1.0 while for diesel, it was 38% and 37%. However, it increased to 77%, 68%, and 54%, 73%, respectively, for PAA/TTEG(1:2) and SAA/TTEG(1:2) when the feedstocks were oxidized. These results showed better extraction performance of DES PAA/TTEG(1:2) than that of SAA/TTEG(1:2) at low-temperature 30oC using extractive combined oxidative desulfurization (ECODS). Hence, the DES synthesized using SAA and TTEG in the mole ratio of 1:2 works better as an extraction solvent for removing the organic sulfur compounds from fuels at low temperatures.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.