Blending modification of Tahe vacuum residuum using Chunfeng vacuum residuum

Abstract

Utilization of vacuum residue resources has been receiving extensive research interests in order to maximize the economic benefits of refineries. In present work, Tahe vacuum residuum (THVR) was blended with Chunfeng vacuum residue (CFVR). The influences of addition of CFVR on properties of THVR were investigated and the average molecular structures of SARA (referring to saturates, aromatics, resins and asphaltenes) of base and modified THVR were determined by using experimental and simulation methods. The results show that CFVR has better low-temperature performance but worse temperature susceptibility as compared with THVR. The blending TH-CF-40 sample containing 40% CFVR can meet the standard of 60# road petroleum asphalt. The saturate of TH-CF-40 has the L of 14.44, which is smaller than that of THVR. Moreover, the aromatic, resin and asphaltene have f_A of 0.29, 0.42 and 0.46, R_A/R_N of 1.24, 2.65 and 2.93, and L of 6.78, 6.09 and 5.40. CFVR shows the similar molecular structure to THVR, therefore, contributes to the improved low-temperature ductility of blending TH-CF-40. Present results can provide theoretical guidance on the optimization utilization of vacuum residue resources.