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Migration and Transformation of Vanadium and Nickel in High Sulfur Petroleum Coke during Gasification Processes.
- Source :
- Energies (19961073); Aug2018, Vol. 11 Issue 8, p2158, 1p, 1 Diagram, 3 Charts, 9 Graphs
- Publication Year :
- 2018
-
Abstract
- The volatilization characteristics and occurrence forms of V and Ni in petroleum coke (petcoke) were investigated during steam (H<subscript>2</subscript>O) and carbon dioxide (CO<subscript>2</subscript>) 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 CO<subscript>2</subscript> 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 H<subscript>2</subscript>O 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 Ni<subscript>3</subscript>S<subscript>2</subscript> between 800–1100 °C. The H<subscript>2</subscript>O atmosphere was favorable to generate the more stable Ni<subscript>x</subscript>S<subscript>y</subscript> compound, thereby suppressing the volatilization of Ni, while the presence of CO<subscript>2</subscript> led to an increase in residual V and decrease of Fe-Mn oxides. The V and Ni mainly caused erosion problems under the CO<subscript>2</subscript> atmosphere while the fouling and slagging obviously increased under the H<subscript>2</subscript>O atmosphere with impacts gradually weakened with the increase of temperature. [ABSTRACT FROM AUTHOR]
- Subjects :
- PETROLEUM coke
CARBON dioxide
COAL gasification
VANADIUM
NICKEL
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 11
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Energies (19961073)
- Publication Type :
- Academic Journal
- Accession number :
- 131448229
- Full Text :
- https://doi.org/10.3390/en11082158