@article{Liu2023, 
author = {Rui-Qi Liu and Li-Qiang Zhang and Hui-Da Pan and Yi-Ya Wang and Jin-Yu Li and Xin-Wei Wang and Zheng-Da Yang and Xin-Lu Han and Ri-Yi Lin},
title = {Study on the in situ desulfurization and viscosity reduction of heavy oil over MoO3–ZrO2/HZSM-5 catalyst},
year = {2023},
journal = {Petroleum Science},
volume = {20},
number = {6},
pages = {3887-3896},
keywords = {Heavy oil, Hydrothermal cracking, MoO3–ZrO2/HZSM-5 catalyst, Desulfurization, Viscosity reduction},
url = {https://www.sciopen.com/article/10.1016/j.petsci.2023.08.005},
doi = {10.1016/j.petsci.2023.08.005},
abstract = {Heavy oil is characterized by high viscosity. High viscosity makes it challenging to recover and transport. HZSM-5, MoO3/HZSM-5, ZrO2/HZSM-5 and MoO3–ZrO2/HZSM-5 catalysts were developed to promote in situ desulfurization and viscosity reduction of heavy oil. The physical and chemical properties of catalysts were characterized by XPS, XRD, TEM, NH3-TPD, etc. The effects of temperature, catalyst type and addition amount on viscosity and composition of heavy oil were evaluated. The results showed that the presence of MoO3–ZrO2/HZSM-5 nanoparticles during aquathermolysis could improve the oil quality by reducing the heavy fractions. It reduced viscosity by 82.56% after the reaction at 280 ℃ and catalyst addition of 1 wt%. The contents of resins and asphaltic in the oil samples were 5.69% lower than that in the crude oil. Sulfur content decreased from 1.45% to 1.03%. The concentration of H2S produced by the reaction was 2225 ppm. The contents of sulfur-containing functional groups sulfoxide and sulfone sulfur in the oil samples decreased by 19.92% after the catalytic reaction. The content of stable thiophene sulfur increased by 5.71%. This study provided a basis for understanding the mechanism of heavy oil desulfurization and viscosity reduction.}
}