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Title: Materials Science Division coal technology seventh quarterly report, April--June 1976. [Gasification plant materials]

Abstract

Preliminary analysis of test results of 15 ceramic refractories for slagging gasifiers indicates that the magnesia-chrome, chrome-bonded alumina, and fusion-cast spinel bricks have substantially better abrasion-corrosion resistance than the other compositions. Thermal-shock testing has indicated that resistance to spalling of ceramic coatings can be improved with the use of graded alumina-chromia and magnesia-alumina multilayer coatings. The first corrosion-erosion test run for a total of 100-h exposure has been completed by Solar, Inc. Of the ceramic coatings, only magnesium zirconate survived the exposure. The refractory specimens exposed simultaneously with the coated metal specimens exhibited moderate or no attack. The in-situ erosion measuring system for the main coal feed line for the Synthane coal-gasification pilot plant has been installed and initial tests have been completed. A thermodynamic approach has been developed to characterize the gas environment in different pilot-plant coal-gasification processes. The analysis is used to examine the thermodynamic stability of iron- and nickel-base alloys in these process environments. The results show that the sulfur and oxygen potentials in all the processes are in a region where chromium oxide will be thermodynamically stable. In the absence of a continuous oxide layer, sulfidation of the alloys is expected, which can lead to severemore » corrosion rates, particularly when liquid nickel sulfides are formed. It is concluded that a protective Cr/sub 2/O/sub 3/ layer is essential for an effective application of these alloys in coal-conversion processes. Failures of HYGAS pilot-plant components resulted from, or were aggravated by, operation under off-design conditions, which resulted in much more corrosive environments than would have occurred under design conditions.« less

Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
US Energy Research and Development Administration (ERDA)
OSTI Identifier:
7337617
Report Number(s):
ANL-76-111
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 36 MATERIALS SCIENCE; 42 ENGINEERING; COAL GASIFICATION PLANTS; REFRACTORIES; CORROSION RESISTANCE; TESTING; SLAGS; CORROSIVE EFFECTS; PROTECTIVE COATINGS; EROSION; FUEL FEEDING SYSTEMS; ULTRASONIC TESTING; IRON BASE ALLOYS; CORROSION; NICKEL BASE ALLOYS; MATHEMATICAL MODELS; BELLOWS; FAILURES; PIPE FITTINGS; ABRASION; CERAMICS; FABRICATION; PERFORMANCE TESTING; THERMAL SHOCK; ACOUSTIC EMISSION TESTING; INDUSTRIAL RADIOGRAPHY; INFRARED SURVEYS; LEAK TESTING; NONDESTRUCTIVE TESTING; PHASE DIAGRAMS; PILOT PLANTS; SULFIDES; THERMODYNAMICS; CHLORIDES; HYGAS PROCESS; INCOLOY 800; METALLOGRAPHY; ACOUSTIC TESTING; ALLOYS; CHALCOGENIDES; CHEMICAL REACTIONS; CHLORINE COMPOUNDS; CHROMIUM ALLOYS; COAL GASIFICATION; COATINGS; DIAGRAMS; FUEL SYSTEMS; FUNCTIONAL MODELS; GASIFICATION; GEOPHYSICAL SURVEYS; HALIDES; HALOGEN COMPOUNDS; HEAT RESISTING ALLOYS; INCOLOY ALLOYS; INDUSTRIAL PLANTS; IRON ALLOYS; MATERIALS TESTING; MECHANICAL STRUCTURES; NICKEL ALLOYS; SNG PROCESSES; SULFUR COMPOUNDS; 010404* - Coal, Lignite, & Peat- Gasification; 360105 - Metals & Alloys- Corrosion & Erosion; 360205 - Ceramics, Cermets, & Refractories- Corrosion & Erosion; 420500 - Engineering- Materials Testing

Citation Formats

. Materials Science Division coal technology seventh quarterly report, April--June 1976. [Gasification plant materials]. United States: N. p., 1976. Web. doi:10.2172/7337617.
. Materials Science Division coal technology seventh quarterly report, April--June 1976. [Gasification plant materials]. United States. https://doi.org/10.2172/7337617
. 1976. "Materials Science Division coal technology seventh quarterly report, April--June 1976. [Gasification plant materials]". United States. https://doi.org/10.2172/7337617. https://www.osti.gov/servlets/purl/7337617.
@article{osti_7337617,
title = {Materials Science Division coal technology seventh quarterly report, April--June 1976. [Gasification plant materials]},
author = {},
abstractNote = {Preliminary analysis of test results of 15 ceramic refractories for slagging gasifiers indicates that the magnesia-chrome, chrome-bonded alumina, and fusion-cast spinel bricks have substantially better abrasion-corrosion resistance than the other compositions. Thermal-shock testing has indicated that resistance to spalling of ceramic coatings can be improved with the use of graded alumina-chromia and magnesia-alumina multilayer coatings. The first corrosion-erosion test run for a total of 100-h exposure has been completed by Solar, Inc. Of the ceramic coatings, only magnesium zirconate survived the exposure. The refractory specimens exposed simultaneously with the coated metal specimens exhibited moderate or no attack. The in-situ erosion measuring system for the main coal feed line for the Synthane coal-gasification pilot plant has been installed and initial tests have been completed. A thermodynamic approach has been developed to characterize the gas environment in different pilot-plant coal-gasification processes. The analysis is used to examine the thermodynamic stability of iron- and nickel-base alloys in these process environments. The results show that the sulfur and oxygen potentials in all the processes are in a region where chromium oxide will be thermodynamically stable. In the absence of a continuous oxide layer, sulfidation of the alloys is expected, which can lead to severe corrosion rates, particularly when liquid nickel sulfides are formed. It is concluded that a protective Cr/sub 2/O/sub 3/ layer is essential for an effective application of these alloys in coal-conversion processes. Failures of HYGAS pilot-plant components resulted from, or were aggravated by, operation under off-design conditions, which resulted in much more corrosive environments than would have occurred under design conditions.},
doi = {10.2172/7337617},
url = {https://www.osti.gov/biblio/7337617}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1976},
month = {Thu Jan 01 00:00:00 EST 1976}
}