Characterization and Deposit Froming Tendency of Polar Compounds in Cracked Components of Gasoline Identification of Phenols and Aromaticsulfur Compounds

Martín, Pedro Jesús Jiménez; McCarty, Frances; Ehrmann, Ursula; Lima, Lola De; Carvajal, Nelson; Rojas, Anibal

doi:10.1080/08843759408916178

Cited by 2 publications

(4 citation statements)

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“…The survival of some sulfur as aliphatic sulfur-containing compounds was anticipated, but the extent to which sulfur was present in aliphatic heterocycles, rather than aromatic heterocycles, was surprising (Table ). Thiophenes are commonly reported in cracked naphtha . Considering that the naphtha contained 0.9 wt % sulfur (Table ), it appeared unlikely that so much aliphatic sulfur would survive the thermal cracking process.…”

Section: Discussionmentioning

confidence: 70%

“…The fate of the diradical determines what subsequent reactions will take place. One possibility is that intermolecular hydrogen transfer converts (2) to (3). The nature of the products identified in the thermally cracked naphtha suggested that hydrogen transfer activity during thermal cracking was high.…”

Section: Discussionmentioning

confidence: 99%

“…For most applications it is not necessary to know the compound specific composition of naphtha, but when one wants to develop new technology or troubleshoot an existing unit, compound specific characterization is valuable. Studies that reported detailed naphtha characterization mainly used chromatographic separation in association with analysis using different detectors. − Preseparation can be used to simplify the matrix by grouping specific compound classes together by extracting specific compound classes based on solubility and/or reaction. , Once detailed characterization is available, spectroscopic methods can be used to replace chromatography for analysis, or to provide a more rapid way of tracking groups of compounds in the naphtha . Still, the detailed characterization of naphtha is onerous, because it is a complex mixture.…”

Section: Introductionmentioning

confidence: 99%

“…Thiophenes are commonly reported in cracked naphtha. 3 Considering that the naphtha contained 0.9 wt % sulfur (Table 1), it appeared unlikely that so much aliphatic sulfur would survive the thermal cracking process.…”

mentioning

confidence: 99%

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Characterization of Heteroatom-Containing Compounds in Thermally Cracked Naphtha from Oilsands Bitumen

Rao

Klerk

2017

Energy Fuels

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Detailed characterization of feed materials can assist with development of new technology and troubleshooting existing units. In this work a methodology for the compound specific analysis of oxygen-, sulfur-, and nitrogen-containing compounds in naphtha is presented. It was applied to the analysis of industrial thermally cracked naphtha produced from Athabasca oilsands bitumen, with 0.25 wt % O, 0.90 wt % S, and 0.09 wt % N. The main oxygen-containing compound classes were acyclic carboxylic acids, ketones, and phenols. Interestingly, the carboxylic acids were almost exclusively linear and branched species in the C3–C11 range. These compounds could be explained by a thermal cracking pathway involving ring-opening of one or more adjacent naphthenic rings. The main sulfur-containing compound class was cyclic thioethers, with a minor amount of thiols. No thiophenes were identified and identification of the most abundant compound, 2-methyl tetrahydrothiophene, was confirmed with an authentic compound. This suggested that the hydrogen transfer during thermal cracking of oilsands derived material was high; the naphtha also had a correspondingly low aromatic content. The main nitrogen-containing compound class was pyridines, with a minor amount of pyrroles.

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%