Molecular composition of low-temperature oxidation products of the heavy oil

• DOI: 10.1016/j.petsci.2023.09.008
• Publication Date: 2023-09-13T01:40:58Z
• Authors: Shuai Ma; Yun-Yun Li; Ri-Gu Su; Xu-Sheng Wang; Jing-Jun Pan; Quan Shi; Guang-Zhi Liao; Chun-Ming Xu

Low-temperature oxidation (LTO) is the main reaction that affects fuel formation in in-situ combustion process, which has important significance for subsequent propulsion and successful extraction of crude oil. In this study, heavy oil was subjected to LTO reactions at different temperatures. Three types products with varying depths were characterized terms number oxygen atoms polarity molecule reveal low-temperature process Ketone compounds acid polyoxides phase deep a higher coke identified increasing depth. The experimental results showed changed from kinetic-controlled diffusion-controlled open system as depth increased. reached maximum stable value content. molecular compositions ketone compound polyoxide did not change significantly further increase temperature. significantly. precursor molecules lower content condensation degree participated formation, pathway complexity product component also