Matches in SemOpenAlex for { <https://semopenalex.org/work/W2912359455> ?p ?o ?g. }
- W2912359455 endingPage "2029" @default.
- W2912359455 startingPage "2018" @default.
- W2912359455 abstract "Asphaltenes challenge nearly all analytical techniques because of their immense polydispersity in molecular composition and structure. This operationally defined fraction of crude oil, insoluble in n-alkanes but soluble in aromatic solvents, is known to concentrate in vacuum residues and islinked to fouling and deposition issues. However, presence and subsequent characterization of asphaltenes are seldom discussed in conventional/unconventional distillate fractions. Here, we isolate asphaltenes from conventional (<593 °C/1099 F) and unconventional (>593 °C) distillation cuts and provide molecular-level characterization by electrospray ionization and atmospheric pressure photoionization Fourier transform ion cyclotron resonance mass spectrometry as a function of boiling point. Our results indicate that asphaltene molecular composition starts in the vacuum gas oil range and extends into vacuum residues. Moreover, we report that distillable asphaltene composition exists as both highly polar (heteroatom rich), aliphatic (atypical asphaltenes) species as well as condensed aromatic structures (classical asphaltenes). As a function of distillation temperature, asphaltene compounds exhibit structural trends consistent with thermal cracking that starts between 510 and 538 °C, increases between 538 and 593 °C, and is readily observed at temperatures up to 700 °C. Above 600 °C, low molecular weight compounds (expected to boil at much lower temperatures) that are n-heptane insoluble are detected across all heteroatom classes. Results herein suggest that these compounds are formed through structural rearrangement of archipelago asphaltenes because of thermal cracking reactions that occur during distillation and precipitate as asphaltenes. We report the isolation and mass spectral characterization of asphaltenes isolated from distillation cuts and propose that quantification of asphaltenes in distillates is critical to predict and prevent problems related to catalyst deactivation." @default.
- W2912359455 created "2019-02-21" @default.
- W2912359455 creator A5002799215 @default.
- W2912359455 creator A5013045374 @default.
- W2912359455 creator A5024537436 @default.
- W2912359455 creator A5049312373 @default.
- W2912359455 creator A5052939226 @default.
- W2912359455 date "2019-01-24" @default.
- W2912359455 modified "2023-10-16" @default.
- W2912359455 title "Molecular-Level Characterization of Asphaltenes Isolated from Distillation Cuts" @default.
- W2912359455 cites W181671371 @default.
- W2912359455 cites W1963761986 @default.
- W2912359455 cites W1964590777 @default.
- W2912359455 cites W1964995568 @default.
- W2912359455 cites W1965018389 @default.
- W2912359455 cites W1967833823 @default.
- W2912359455 cites W1968625234 @default.
- W2912359455 cites W1969351646 @default.
- W2912359455 cites W1970755955 @default.
- W2912359455 cites W1979114883 @default.
- W2912359455 cites W1985386266 @default.
- W2912359455 cites W1989560433 @default.
- W2912359455 cites W1992361558 @default.
- W2912359455 cites W1993259853 @default.
- W2912359455 cites W1994471277 @default.
- W2912359455 cites W1996887397 @default.
- W2912359455 cites W1996937159 @default.
- W2912359455 cites W2000922191 @default.
- W2912359455 cites W2004874380 @default.
- W2912359455 cites W2005309102 @default.
- W2912359455 cites W2005396292 @default.
- W2912359455 cites W2005683528 @default.
- W2912359455 cites W2005756457 @default.
- W2912359455 cites W2010073862 @default.
- W2912359455 cites W2010638329 @default.
- W2912359455 cites W2012830330 @default.
- W2912359455 cites W2016438609 @default.
- W2912359455 cites W2017333141 @default.
- W2912359455 cites W2021469310 @default.
- W2912359455 cites W2021539068 @default.
- W2912359455 cites W2022379725 @default.
- W2912359455 cites W2025054466 @default.
- W2912359455 cites W2028969634 @default.
- W2912359455 cites W2030830125 @default.
- W2912359455 cites W2034731245 @default.
- W2912359455 cites W2038100788 @default.
- W2912359455 cites W2040802245 @default.
- W2912359455 cites W2047365962 @default.
- W2912359455 cites W2047372589 @default.
- W2912359455 cites W2049677059 @default.
- W2912359455 cites W2049693423 @default.
- W2912359455 cites W2051574219 @default.
- W2912359455 cites W2053680987 @default.
- W2912359455 cites W2053718838 @default.
- W2912359455 cites W2056430282 @default.
- W2912359455 cites W2060313034 @default.
- W2912359455 cites W2062812740 @default.
- W2912359455 cites W2064636048 @default.
- W2912359455 cites W2066004132 @default.
- W2912359455 cites W2068843163 @default.
- W2912359455 cites W2069152639 @default.
- W2912359455 cites W2072790553 @default.
- W2912359455 cites W2073280118 @default.
- W2912359455 cites W2073896201 @default.
- W2912359455 cites W2074271303 @default.
- W2912359455 cites W2074625217 @default.
- W2912359455 cites W2075005172 @default.
- W2912359455 cites W2076140661 @default.
- W2912359455 cites W2090585691 @default.
- W2912359455 cites W2090812235 @default.
- W2912359455 cites W2093381034 @default.
- W2912359455 cites W2144280842 @default.
- W2912359455 cites W2170461326 @default.
- W2912359455 cites W2199686530 @default.
- W2912359455 cites W2284730941 @default.
- W2912359455 cites W2290194895 @default.
- W2912359455 cites W2312511869 @default.
- W2912359455 cites W2312916647 @default.
- W2912359455 cites W2313744662 @default.
- W2912359455 cites W2313936499 @default.
- W2912359455 cites W2314561356 @default.
- W2912359455 cites W2315923570 @default.
- W2912359455 cites W2317768851 @default.
- W2912359455 cites W2317777999 @default.
- W2912359455 cites W2318814099 @default.
- W2912359455 cites W2318893345 @default.
- W2912359455 cites W2319164480 @default.
- W2912359455 cites W2323171016 @default.
- W2912359455 cites W2325347934 @default.
- W2912359455 cites W2326344740 @default.
- W2912359455 cites W2330458918 @default.
- W2912359455 cites W2330541891 @default.
- W2912359455 cites W2332742195 @default.
- W2912359455 cites W2335332805 @default.
- W2912359455 cites W2345304083 @default.
- W2912359455 cites W2405210396 @default.
- W2912359455 cites W2482410189 @default.
- W2912359455 cites W2491902684 @default.