Basic refractory and slag management for petcoke carbon feedstock in gasifiers
The disclosure provides methods of operating a slagging gasifier using a carbon feedstock having a relatively high V.sub.2O.sub.5 to SiO.sub.2 ratio, such as petcoke. The disclosure generates a combined chemical composition in the feed mixture having less than 25 wt. % SiO.sub.2, greater than 20 wt. % V.sub.2O.sub.5, and greater than 20 wt. % CaO. The method takes advantage of a novel recognition that increased levels of SiO.sub.2 tend to decrease dissolution of the V.sub.2O.sub.3 which forms under the reducing conditions of the gasifier, and utilizes the CaO additive to establish a chemical phase equilibria comprised of lower melting compounds. The method further provides for control based on the presence of Al.sub.2O.sub.3 and FeO, and provides for a total combined chemical composition of greater than about 5 wt. % MgO for use with refractory linings comprised of MgO based refractory brick.
- Research Organization:
- National Energy Technology Laboratory (NETL), Albany, OR (United States)
- Sponsoring Organization:
- USDOE
- Assignee:
- U.S. Department of Energy (Washington, DC)
- Patent Number(s):
- 8,703,021
- Application Number:
- 13/661,170
- OSTI ID:
- 1129391
- Country of Publication:
- United States
- Language:
- English
Crystallization of Synthetic Coal−Petcoke Slag Mixtures Simulating Those Encountered in Entrained Bed Slagging Gasifiers †
|
journal | October 2009 |
Phase Equilibria in Synthetic Coal–Petcoke Slags (Al 2 O 3 –CaO–FeO–SiO 2 –V 2 O 3 ) under Simulated Gasification Conditions
|
journal | July 2011 |
Review and modeling of viscosity of silicate melts: Part I. Viscosity of binary and ternary silicates containing CaO, MgO, and MnO
|
journal | February 1998 |
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