Modified Effects of Additives to Petroleum Pitch on the Mesophase Development of the Carbonized Solid Products

CATEGORY: HEAVY CRUDE
Modified Effects of Additives to Petroleum Pitch on the Mesophase Development of the Carbonized Solid Products

Type	Journal Article
Author	Bin Lou
Author	State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266555, People’s Republic of China
URL	http://dx.doi.org/10.1021/acs.energyfuels.5b01920
Volume	30
Issue	2
Pages	796-804
Publication	Energy & Fuels
Date	February 18, 2016
Abstract	Reports comparative studies in carbonization behaviors of petroleum pitch (SS70 pitch) and SS70-pitch–additive mixtures to examine the modified mechanisms of additives. Researchers also studied the carbonization of solvent fractions in SS70 pitch to determine the relationships among solvent fractions and the additives. The characterization of resultant solid products by X-ray diffraction and scanning electron microscope analysis showed that samples obtained from co-carbonization of SS70–aromatic oil (P1) and SS70–aromatics enriched fractions of FCC slurry (P2) mixtures respectively had higher stacking layer numbers of mesogens and flatter morphology than those of specimens produced by carbonization of SS70 pitch and SS70–deasphalt oil (P3) mixtures. Adding additives P1 and P2 into SS70 pitch lowered not only the rates of carbonization but also the aromaticity and size of aromatic molecules in toluene insolubles formed in the early stage of carbonization, both jointly contributing to the formation of well-developed mesophase. The asphaltenes of SS70 pitch were prone to forming the poorly developed mesophase due to its high reactivity and also interfered with the carbonized performance of maltenes.