Detailed high resolution gas chromatography-mass spectrometry analysis of a pyrolysis naphtha

Abstract

Unknown Propenylbenzene 1 -Methyl-2-ethylbenzene Propenylbenzene Comment z = -2 z = -2 z = -2 z = o z = o z = -4 z = -4 m / e 96, Z = -2 z = o z = -4 z = -4 z = -2 z = -4 z = f 2 z = -2 , z = -4 z = -4 z = -4 z = -2 z = -2 z = -2 m / e 110, Z = -2 z = o m / e 104 z = o z = o z = o z = o m / e 118 m / e 120 z = -2 m / e 120 m / e 120 z = -4 m / e 118 m,/e 120 m / e 118

Gas chromatography

“…These analyses were run on columns ranging in length from 0.05 (1197) to 300 meters (538,1146) and represent the separation of samples ranging in complexity from two components (880) to thousands (185). The above papers were cited in reasonable completeness because the methodology and technology of successfully implementing open tubular columns is parceled throughout these analytical procedures.…”

Proton Nuclear Magnetic Resonance (1H-NMR) Methodology for Monolefin Analysis: Application to Aquaprocessing-Upgraded Bitumen

“…Figure presents the 1 H-NMR olefin window (4.5–6.8 ppm) for the selected samples. Five identified monolefin groups were found to be present in all the samples; important contribution from the sixth group pertaining to conjugated diolefins was observed for the cracked naphtha and the pyrolysis gasoline. , The pygas spectrum was found to be extremely complex, presenting strong signals spanning the whole illustrated range of the spectrum; this finding came as a surprise; however, it was rationalized based on the complex hydrocarbon distribution reported before for another studied pyrolysis naphtha …”

“…7,27 The pygas spectrum was found to be extremely complex, presenting strong signals spanning the whole illustrated range of the spectrum; this finding came as a surprise; however, it was rationalized based on the complex hydrocarbon distribution reported before for another studied pyrolysis naphtha. 8 Figure 5 presents the details of the olefinic region for the sample CGA87 before and after treating with silica gel. In the present case, oxygenated components (alcohols) are observed to overlap with the spiked dioxane IS signal, thus indicating why for samples like the present one it was found mandatory to remove the additives before running quantitative SFC 17 or 1 H-NMR analysis based on internal standardization with dioxane.…”

“…Olefin analysis for light petroleum distillates has been carried out for a long time using high-resolution gas chromatography (HRGC) as described by Gallegos and co-workers for the analysis of pyrolysis gasoline . Routine application of HRGC has been described for the group-type hydrocarbon analysis in terms of paraffins–isoparaffins–olefins–naphthenes–aromatics (PIONA), and HRGC standard methodology has been issued for this purpose .…”

“…6,7 Olefin analysis for light petroleum distillates has been carried out for a long time using high-resolution gas chromatography (HRGC) as described by Gallegos and co-workers for the analysis of pyrolysis gasoline. 8 Routine application of HRGC has been described for the group-type hydrocarbon analysis in terms of paraffins−isoparaffins−olefins−naphthenes−aromatics (PIONA), 9 and HRGC standard methodology has been issued for this purpose. 10 High-performance liquid chromatography (HPLC) has been extensively used for analysis of olefins based on their complexation with Ag + ions immobilized over specially designed olefin columns.…”