02019nab a2200205 4500 20260520000839.0 260224s2009 xxu Characterization of heteroatoms in residue fluid catalytic cracking (RFCC) diesel by gas chromatography and mass spectrometry nov./dic. 2009 09/06/2010 ; 09/06/2010 8 p. ; 6062-6069 Transcripción del resumen del autor. Nitrogen-, sulfur-, and oxygen-containing hydrocarbons in a residue fluid catalytic cracking (RFCC)-derived diesel were characterized by a gas chromatograph equipped with a pulsed flame photometric detector and an electron impact, ammonia chemical ionization mass spectrometer. Caustic and acid extractions on RFCC diesel were performed to isolate the phenolic and basic nitrogen compounds, respectively. The fraction of RFCC diesel that contained the basic nitrogen compounds was reacted with acetic anhydride to allow for chromatographic separation of amino-aromatic compounds from the rest of the non-reactive basic nitrogen compounds. The majority of basic nitrogen compounds were anilines, as expected. Non-basic nitrogen compounds in RFCC diesel were alkyl indoles and alkyl carbazoles. Double-ring and poly-aromatic amines were identified in RFCC diesel by the acetylation reaction. The majority of sulfur compounds in RFCC diesel were alkyl benzothiophenes and dibenzothiophenes, after being isolated by Pd2+ ligand-exchange chromatography. Dihydrobenzohiophenes and dihydronaphthanthiophenes, despite a low concentration, were also identified in the subfractions. The majority of oxygen compounds in RFCC diesel were phenolic compounds. In addition to alkylphenols, bicyclic and polycyclic phenols were identified and characterized in the acidic fraction. 6 Energy & fuels 23 ARTICULO Shi, Quan 42416 Xu, Chunming 39312 Zhao, Suoqi 26203 170853 170853 0 0 0 0 238672 BAAB BAAB 2026-03-05 200045707 0 200045707 2026-03-05 15:13:12 2026-03-05 ARTICULO