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Title: Basic refractory and slag management for petcoke carbon feedstock in gasifiers

Abstract

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.

Inventors:
; ;
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Albany, OR (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1129391
Patent Number(s):
8703021
Application Number:
13/661,170
Assignee:
U.S. Department of Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10J - PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Oct 26
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Kwong, Kyei-Sing, Bennett, James P, and Nakano, Jinichiro. Basic refractory and slag management for petcoke carbon feedstock in gasifiers. United States: N. p., 2014. Web.
Kwong, Kyei-Sing, Bennett, James P, & Nakano, Jinichiro. Basic refractory and slag management for petcoke carbon feedstock in gasifiers. United States.
Kwong, Kyei-Sing, Bennett, James P, and Nakano, Jinichiro. Tue . "Basic refractory and slag management for petcoke carbon feedstock in gasifiers". United States. https://www.osti.gov/servlets/purl/1129391.
@article{osti_1129391,
title = {Basic refractory and slag management for petcoke carbon feedstock in gasifiers},
author = {Kwong, Kyei-Sing and Bennett, James P and Nakano, Jinichiro},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {4}
}

Works referenced in this record:

Partial oxidation process
patent, May 1987


Partial oxidation process
patent, August 1990


Deslagging gasifiers by controlled heat and derivatization
patent, August 1994


Gasifier additives for improved refractory life
patent, June 2012


Crystallization of Synthetic Coal−Petcoke Slag Mixtures Simulating Those Encountered in Entrained Bed Slagging Gasifiers
journal, October 2009


Review and modeling of viscosity of silicate melts: Part I. Viscosity of binary and ternary silicates containing CaO, MgO, and MnO
journal, February 1998