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- W2516836880 abstract "Using solid-state 13C NMR spectroscopy of two different asphaltenes, one derived from petroleum and the other from coal liquids, it was shown that the asphaltene molecular architecture consists of a spectrum of sizes, ranging from smaller polyaromatic hydrocarbons (PAHs; <5 condensed rings) to much larger ones (>9 condensed rings), but their distribution varies between the two. It is shown that smaller PAHs are likely more abundant in the coal-derived asphaltenes, while the largest PAH cores of the two different asphaltenes are similar in size. These observations are reinforced by optical absorption. The coal-derived asphaltenes were found to contain a small fraction of archipelago-type structures, where a small PAH is tethered to the larger PAH core via an aryl linkage, which are less evident, and likely less abundant, in the petroleum asphaltenes. An important difference between the two asphaltenes lies in their alkyl fraction, with the petroleum asphaltenes possessing significantly longer and more mobile alkyl side chains, on average ∼7 carbons long, as opposed to an average chain length of ∼3–4 in the coal asphaltenes. The petroleum asphaltenes also possess a larger fraction of alicyclics. The longer length increases the propensity of the petroleum asphaltene alkyl side chains to intercalate between the aromatic rings of adjacent asphaltene aggregates, which is not observed in coal-derived asphaltenes. This work demonstrates the utility of combining cross-polarization dynamics and directly polarized 13C solid-state NMR spectroscopy in studying asphaltenes, while adding to the body of evidence supporting the single-core model of asphaltenes, which appears to be the dominant structural motif for this fraction of petroleum." @default.
- W2516836880 created "2016-09-16" @default.
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- W2516836880 date "2016-09-07" @default.
- W2516836880 modified "2023-09-23" @default.
- W2516836880 title "Single-Core PAHs in Petroleum- and Coal-Derived Asphaltenes: Size and Distribution from Solid-State NMR Spectroscopy and Optical Absorption Measurements" @default.
- W2516836880 cites W1563939485 @default.
- W2516836880 cites W1592388355 @default.
- W2516836880 cites W1652878423 @default.
- W2516836880 cites W1965979870 @default.
- W2516836880 cites W1967931457 @default.
- W2516836880 cites W1973499914 @default.
- W2516836880 cites W1974993897 @default.
- W2516836880 cites W1977781035 @default.
- W2516836880 cites W1978693853 @default.
- W2516836880 cites W1980637262 @default.
- W2516836880 cites W1982591113 @default.
- W2516836880 cites W1983208534 @default.
- W2516836880 cites W1989383039 @default.
- W2516836880 cites W1989686363 @default.
- W2516836880 cites W1990215975 @default.
- W2516836880 cites W1990953371 @default.
- W2516836880 cites W1993135296 @default.
- W2516836880 cites W1995684634 @default.
- W2516836880 cites W1999751296 @default.
- W2516836880 cites W2003401092 @default.
- W2516836880 cites W2005272829 @default.
- W2516836880 cites W2010346434 @default.
- W2516836880 cites W2014364585 @default.
- W2516836880 cites W2017333141 @default.
- W2516836880 cites W2017812460 @default.
- W2516836880 cites W2019755902 @default.
- W2516836880 cites W2020844788 @default.
- W2516836880 cites W2030122308 @default.
- W2516836880 cites W2030712936 @default.
- W2516836880 cites W2031611805 @default.
- W2516836880 cites W2037167049 @default.
- W2516836880 cites W2045765603 @default.
- W2516836880 cites W2047372589 @default.
- W2516836880 cites W2047555677 @default.
- W2516836880 cites W2049677059 @default.
- W2516836880 cites W2053718838 @default.
- W2516836880 cites W2055766501 @default.
- W2516836880 cites W2055857218 @default.
- W2516836880 cites W2059845027 @default.
- W2516836880 cites W2061028685 @default.
- W2516836880 cites W2066909672 @default.
- W2516836880 cites W2067252148 @default.
- W2516836880 cites W2068279304 @default.
- W2516836880 cites W2072639250 @default.
- W2516836880 cites W2074325906 @default.
- W2516836880 cites W2075079546 @default.
- W2516836880 cites W2080073711 @default.
- W2516836880 cites W2085001780 @default.
- W2516836880 cites W2085808677 @default.
- W2516836880 cites W2086487335 @default.
- W2516836880 cites W2091837460 @default.
- W2516836880 cites W2092478761 @default.
- W2516836880 cites W2093076883 @default.
- W2516836880 cites W2097844220 @default.
- W2516836880 cites W2134860803 @default.
- W2516836880 cites W2141684892 @default.
- W2516836880 cites W2160330690 @default.
- W2516836880 cites W2161371581 @default.
- W2516836880 cites W2199686530 @default.
- W2516836880 cites W2236623899 @default.
- W2516836880 cites W2281736725 @default.
- W2516836880 cites W2312511869 @default.
- W2516836880 cites W2313682024 @default.
- W2516836880 cites W2313906397 @default.
- W2516836880 cites W2316637249 @default.
- W2516836880 cites W2316740112 @default.
- W2516836880 cites W2317777999 @default.
- W2516836880 cites W2319023244 @default.
- W2516836880 cites W2323014704 @default.
- W2516836880 cites W2323786763 @default.
- W2516836880 cites W2325410418 @default.
- W2516836880 cites W2327683241 @default.
- W2516836880 cites W2327923573 @default.
- W2516836880 cites W2328611203 @default.
- W2516836880 cites W2329545878 @default.
- W2516836880 cites W2334260067 @default.
- W2516836880 cites W2334386657 @default.
- W2516836880 cites W2334862340 @default.
- W2516836880 cites W2335054222 @default.
- W2516836880 cites W2335533173 @default.
- W2516836880 cites W2345664853 @default.
- W2516836880 cites W2405654583 @default.
- W2516836880 cites W2548994626 @default.
- W2516836880 cites W2950504817 @default.
- W2516836880 cites W4239679235 @default.
- W2516836880 doi "https://doi.org/10.1021/acs.energyfuels.5b02815" @default.