Migration and Transformation of Vanadium and Nickel in High Sulfur Petroleum Coke during Gasification Processes
AbstractThe volatilization characteristics and occurrence forms of V and Ni in petroleum coke (petcoke) were investigated during steam (H2O) and carbon dioxide (CO2) gasification on a fixed bed reactor at 800–1100 °C. The Tessier sequential chemical extraction procedure was employed to determine the different forms of V and Ni. The results showed their volatilities were not dependent on the gasification atmosphere, but rather relied mainly on the reaction temperature. The CO2 atmosphere accelerated the conversion of organic-bound nickel to residual form at low temperature and promoted Fe-Mn oxides formation at high temperature. However, the H2O atmosphere was conducive to form vanadium bound to Fe-Mn oxides and promoted the decomposition of residual forms. In addition, the thermodynamic equilibrium calculations showed the volatilization of Ni mainly released Ni3S2 between 800–1100 °C. The H2O atmosphere was favorable to generate the more stable NixSy compound, thereby suppressing the volatilization of Ni, while the presence of CO2 led to an increase in residual V and decrease of Fe-Mn oxides. The V and Ni mainly caused erosion problems under the CO2 atmosphere while the fouling and slagging obviously increased under the H2O atmosphere with impacts gradually weakened with the increase of temperature. View Full-Text
Share & Cite This Article
Li, W.; Wang, B.; Nie, J.; Yang, W.; Xu, L.; Sun, L. Migration and Transformation of Vanadium and Nickel in High Sulfur Petroleum Coke during Gasification Processes. Energies 2018, 11, 2158.
Li W, Wang B, Nie J, Yang W, Xu L, Sun L. Migration and Transformation of Vanadium and Nickel in High Sulfur Petroleum Coke during Gasification Processes. Energies. 2018; 11(8):2158.Chicago/Turabian Style
Li, Wei; Wang, Ben; Nie, Jun; Yang, Wu; Xu, Linlin; Sun, Lushi. 2018. "Migration and Transformation of Vanadium and Nickel in High Sulfur Petroleum Coke during Gasification Processes." Energies 11, no. 8: 2158.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.