残液
化学
二甲基亚砜
溶剂
萃取(化学)
轻质原油
有机化学
碳氢化合物
气相色谱法
色谱法
作者
Kirtika Kohli,Prasenjit Ghosh,Vedant A. Joshi,Pooja Yadav,Dulal Krishna Tripathi,Rajesh Singh,Susanta Kumar Maity,Manoj Srivastava
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2023-08-23
卷期号:37 (17): 12811-12823
标识
DOI:10.1021/acs.energyfuels.3c02048
摘要
Light cycle oil (LCO) is a low-quality and poorly marketable byproduct of a fluidized catalytic cracker (FCC) in a typical petroleum refinery and contains valuable aromatic components. The present work investigates the extraction of diaromatic components from LCO using solvents such as nitromethane, n-formyl morpholine, dimethylformamide, dimethyl sulfoxide, and n-methyl-2-pyrrolidone. The experimental work indicated that dimethyl sulfoxide showed better results in terms of a high aromatic distribution coefficient and diaromatic recovery value. Because of its better performance and lesser toxicity compared to conventional solvents such as n-methyl-2-pyrrolidone, dimethyl sulfoxide is an ideal candidate for the solvent extraction process. Further, extraction parameter optimization (varying the solvent-to-feedstock ratio and extraction temperature) was also performed with the dimethyl sulfoxide solvent and light cycle oil feedstock obtained from a refinery. The raffinate and extract products were characterized using different techniques such as Fourier-transform infrared spectroscopy, 1H and 13C nuclear magnetic resonance, and gas chromatography mass spectrometry (GC-MS) for detailed hydrocarbon compositional analysis. The GC-MS characterization results of the extract hydrocarbons showed the presence of naphthalene derivatives (mainly 1-methylnaphthalene and 2,6-dimethylnaphthalene). Therefore, the aromatic rich extract product obtained after the extraction experiments can be further used as a valuable precursor to the feed stream in the hydrocarbon industry.
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