Investigation of Asphaltene Chemical Structural Modification Induced by Thermal Treatments

Autor:	Silvia Spera, Luciano Santolini, Stefano Chiaberge, Mario Salvalaggio, Pietro Cesti, Luciano Montanari, Gianfranco Guglielmetti
Rok vydání:	2009
Předmět:	chemistry.chemical_classification Chemistry General Chemical Engineering Energy Engineering and Power Technology Chemical modification Coke Thermal treatment Fuel oil Catalysis Fuel Technology Chemical engineering Elemental analysis Organic chemistry Alkyl Asphaltene
Zdroj:	Energy & Fuels. 23:4486-4495
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef900206n
Popis:	In the conversion of heavy oil into valuable fuels by thermal processes, one of the main problems is the formation of soft coke-like substances that can cause equipment fouling and catalyst deactivation. Asphaltenes are present in large quantity in heavy crude oil and are known to be coke precursors. The objective of the present study was to obtain chemical structure information about the asphaltene molecules when they undergo a thermal treatment and to investigate the mechanism of coke formation. Asphaltenes were separated from two industrial thermal treated heavy crude oils and characterized by elemental analysis, NMR, FTIR, and FT-ICR MS. Analytical data were then compared with that obtained from asphaltene samples after thermal treatment at 400 °C. From complementary and comparative use of the different analytical techniques, we demonstrated that asphaltenes thermally treated at 400 °C tend to aromatize to form coke precursors. We found that the species rich in saturated rings and/or alkyl chains are ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5284244fdfc253d3c57f9164f33b2ec5 https://doi.org/10.1021/ef900206n Zobrazit plný text záznamu