Stepwise Structural Characterization of Asphaltenes during Deep Hydroconversion Processes Determined by Atmospheric Pressure Photoionization (APPI) Fourier Transform Ion Cyclotron Resonance (FT-ICR) Mass Spectrometry

Autor:	Ryan P. Rodgers, Jeremiah M. Purcell, Isabelle Merdrignac, Alan G. Marshall, Isabelle Guibard, Thierry Gauthier
Rok vydání:	2009
Předmět:	chemistry.chemical_classification Atmospheric pressure Chemistry General Chemical Engineering Analytical chemistry Energy Engineering and Power Technology Petroleomics Aromaticity Photoionization Mass spectrometry Fourier transform ion cyclotron resonance Fuel Technology Hydrocarbon Asphaltene
Zdroj:	Energy & Fuels. 24:2257-2265
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef900897a
Popis:	The compositional analysis (speciation) of heavy oil products is a key step to improve our understanding of hydrotreatment processes and reaction mechanisms. Thus, detailed characterization of polar fractions, such as asphaltenes, should be considered. Here, we employ atmospheric pressure photoionization Fourier transform ion cyclotron mass spectrometry to monitor the evolution of the asphaltene hydrocarbon and sulfur families in deep hydrotreatment processes (fixed and ebullated beds). The results suggest that the complexity of the asphaltenic fractions (in terms of chemical polydispersity) is drastically lowered with increased process severity. In either fixed or ebullated beds, the evolution of the sulfur species is quite similar in class composition, aromaticity (DBE/carbon number ratio), and polycondensation (DBE). The compositional changes are marked by a drastic increase in aromaticity to highly polycondensed dealkylated aromatic structures. Asphaltene disaggregation followed by a dealkylation of t...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17454f12e9328fc6cec027eab3c09416 https://doi.org/10.1021/ef900897a Zobrazit plný text záznamu