Determination of the boiling point distribution of sulfur compounds in light cycle oil using GC with a flame photometric detector and pyrolyzer

Abstract

A method has been developed to determine the boiling point distribution of sulfur compounds in light cycle oils (LCO'S). The method chosen for this analysis was GC with a flame photometric detector (FPD) and pyrolyzer. Tests were carried out to evaluate the recovery efficiency, repeatability, and accuracy of the method. Repeatabilities within 2% were obtained. The recovery of benzothiophenes and dibenzothiophenes was close to 100%; this was important because these are the major sulfur components in LCO's. No hydrocarbon or solvent interferences were observed Gith the use of the pyrolyzer, even for a 95% solvent level. Comparison with results from other techniques showed that the method accurately determined the levels of sulfur compounds in the LCO boiling point range.

Multidimensional GC using planar microfluidic devices for the characterization of phenolic antioxidants in fuels

“…This ultimately can have a negative impact on fuel storage and performance due to an overestimation of the actual content of the oxidants. As well, the methods were typically applicable to one specific type of fuel matrix with a limited number of antioxidants involved .…”

Quantitative determination of n-alkanethiols in air and in a blended gas mixture of methane with air by gas chromatography/differential mobility spectrometry

“…Additional concerns today include the sulfur poisoning of catalysts by impurities, significantly by alkanethiols (thiols or mercaptans), in feedstock and the polluting of atmospheric environments by combustion products from sulfur compounds in gasoline or diesel fuels. Knowledge of the amounts of individual thiols in natural gas is considered important and gas chromatography (GC) has been used to pre-fractionate natural gas samples [7][8][9][10][11][12][13] though GC alone cannot provide complete resolution between thiols and constituents of the hydrocarbon matrix, even with advanced chromatographic methods [14,15]. Consequently, determinations of thiols by GC are dependent upon detectors with high selectivity in response to sulfur-compounds in a hydrocarbon matrix, as illustrated with detectors based on atomic emission [16], photoionization [17,18], chemiluminescence [19,20], flame photometry [21,22], and electrolytic conductivity [23].…”

Simultaneous Measurement of Hydrocarbons and Sulfur Compounds using Flame Ionization and Sulfur Chemiluminescence Detection for Sulfur Simulated Distillation

“…Various approaches have been developed to address these needs for sulfur simulated distillation, e.g., by GC-AED (GC with atomic emission detection) [3], and flame photometric detection (FPD) coupled with a furnace to convert all sulfur compounds to SO 2 [4,5]. GC-AED is an extremely powerful technique, allowing the determination of several elemental chromatograms simultaneously.…”