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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}
}

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Works referenced in this record:

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