Extraction of bituminous material from fossil organic matter using liquid carbon dioxide under liquid-vapour equilibrium conditions
نویسندگان
چکیده
Extracts from a peat, a low-rank coal and a bituminous oíl shale obtained with liquid carbon dioxide were studied by capillary gas chromatography-mass spectrometry and compared with those obtained by Soxhlet extraetion with n-hexane. Although the extraetion yields with liquid carbon dioxide were lower, the composition of the extraets, comprising mainly a large variety of linear and cyclic hydrocarbons. was similar in both cases. Owing to the advantages of the Iíquid earbon dioxide extraetion regarding speed, c1eanliness and mildness ofthe extraction conditions, it seems to be an adequate procedure, coupled with gas chromatography-mass spectrometry, to study the biomarker composition of sedimentary organic matter.
منابع مشابه
A Molecular-Based Equation of State for Vapour-liquid Equilibrium of Pure Substances
A semi-empirical equation of state has been studied for modelling vapour-liquid data of pure substances. The specific molecular based equation of state is employed here as basis because of its mathematical simplicity. The semi-empirical extension has been accomplished to real fluids by correlating the density dependence of the attraction term to vapour liquid data of a reference fluid. The resu...
متن کاملSelective Liquid-Liquid Extraction of Lead Ions Using Newly Synthesized Extractant 2-(Dibutylcarbamoyl)benzoic Acid
A new carboxylic acid extractant, named 2-(dibutylcarbamoyl)benzoic acid, is prepared and its potential for selective solvent extraction and recovery of lead ions from industrial samples was investigated. The slope analysis indicated that the lead ions are extracted by formation of 1:2 metal to ligand complexes. The effect of the parameters influencing the extraction efficiency including kind o...
متن کاملA dynamic model for the de-absorption of carbon dioxide from Monoethanolamine solution
Due to the adverse effect of CO2 from fossil fuel combustion on the earth’s ecosystems, the most cost effective method for CO2 capture is an important area of research. The predominant process for CO2 capture currently employed by industry is chemical absorption in amine solutions. A dynamic model for the deabsorption process was developed with Monoethanolamine solution. Henry’s law was used fo...
متن کاملDetermination of Organic Sulfur Contaminants Using Hollow Fibre-protected Liquid-phase Micro-extraction Coupled with Gas Chromatography
A simple and solvent-minimized sample preparation technique based on hollow fibre-protected liquid-phase micro-extraction has been developed for extraction of fifteen organic sulphur compounds from aqueous samples. The analysis of the extracted them was performed by gas chromatography equipped with mass spectrometry and/or flame photometric detectors. 3.3 µL of organic solvent located in the lu...
متن کاملFast Analysis of PAH in Complex Organic Carbon Mixtures by Reconstruction of UV-Visible Spectra
Polycyclic aromatic hydrocarbons (PAH) are components of complex organic mixtures featuring liquid and solid fossil fuels as well as tars derived from combustion and/or pyrolysis of coal and hydrocarbon fuels. PAH can also be detected at the exhaust of combustion systems, often associated to carbon particulate matter emissions. Due to their high toxicological potential the concentration levels ...
متن کامل