skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High-temperature-staged fluidized-bed combustion (HITS), bench scale experimental test program conducted during 1980. Final report

Abstract

An experimental program was conducted to evaluate the process feasibility of the first stage of the HITS two-stage coal combustion system. Tests were run in a small (12-in. ID) fluidized bed facility at the Energy Engineering Laboratory, Aerojet Energy Conversion Company, Sacramento, California. The first stage reactor was run with low (0.70%) and high (4.06%) sulfur coals with ash fusion temperatures of 2450/sup 0/ and 2220/sup 0/F, respectively. Limestone was used to scavenge the sulfur. The produced low-Btu gas was burned in a combustor. Bed temperature and inlet gas percent oxygen were varied in the course of testing. Key results are summarized as follows: the process was stable and readily controllable, and generated a free-flowing char product using coals with low (2220/sup 0/F) and high (2450/sup 0/F) ash fusion temperatures at bed temperatures of at least 1700/sup 0/ and 1800/sup 0/F, respectively; the gaseous product was found to have a total heating value of about 120 Btu/SCF at 1350/sup 0/F, and the practicality of cleaning the hot product gas and delivering it to the combustor was demonstrated; sulfur capture efficiencies above 80% were demonstrated for both low and high sulfur coals with a calcium/sulfur mole ratio of approximately two; gasificationmore » rates of about 5,000 SCF/ft/sup 2/-hr were obtained for coal input rates ranging from 40 to 135 lbm/hr, as required to maintain the desired bed temperatures; and the gaseous product yielded combustion temperatures in excess of 3000/sup 0/F when burned with preheated (900/sup 0/F) air. The above test results support the promise of the HITS system to provide a practical means of converting high sulfur coal to a clean gas for industrial applications. Sulfur capture, gas heating value, and gas production rate are all in the range required for an effective system. Planning is underway for additional testing of the system in the 12-in. fluid bed facility, including demonstration of the second stage char burnup reactor.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Aerojet Energy Conversion Co., Sacramento, CA (USA)
OSTI Identifier:
6039493
Report Number(s):
DOE/ET/15167-191
DOE Contract Number:  
AC21-79ET15167
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 01 COAL, LIGNITE, AND PEAT; COAL; FLUIDIZED-BED COMBUSTION; FLUIDIZED-BED COMBUSTORS; DESIGN; OPERATION; PERFORMANCE; LOW BTU GAS; COMBUSTION; COAL GASIFICATION; EXPERIMENTAL DATA; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; COMBUSTORS; DATA; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUEL GAS; FUELS; GAS FUELS; GASES; GASIFICATION; INFORMATION; MATERIALS; NUMERICAL DATA; OXIDATION; THERMOCHEMICAL PROCESSES; 421000* - Engineering- Combustion Systems; 014000 - Coal, Lignite, & Peat- Combustion; 010404 - Coal, Lignite, & Peat- Gasification

Citation Formats

Anderson, R E, Jassowski, D M, Newton, R A, and Rudnicki, M L. High-temperature-staged fluidized-bed combustion (HITS), bench scale experimental test program conducted during 1980. Final report. United States: N. p., 1981. Web. doi:10.2172/6039493.
Anderson, R E, Jassowski, D M, Newton, R A, & Rudnicki, M L. High-temperature-staged fluidized-bed combustion (HITS), bench scale experimental test program conducted during 1980. Final report. United States. https://doi.org/10.2172/6039493
Anderson, R E, Jassowski, D M, Newton, R A, and Rudnicki, M L. 1981. "High-temperature-staged fluidized-bed combustion (HITS), bench scale experimental test program conducted during 1980. Final report". United States. https://doi.org/10.2172/6039493. https://www.osti.gov/servlets/purl/6039493.
@article{osti_6039493,
title = {High-temperature-staged fluidized-bed combustion (HITS), bench scale experimental test program conducted during 1980. Final report},
author = {Anderson, R E and Jassowski, D M and Newton, R A and Rudnicki, M L},
abstractNote = {An experimental program was conducted to evaluate the process feasibility of the first stage of the HITS two-stage coal combustion system. Tests were run in a small (12-in. ID) fluidized bed facility at the Energy Engineering Laboratory, Aerojet Energy Conversion Company, Sacramento, California. The first stage reactor was run with low (0.70%) and high (4.06%) sulfur coals with ash fusion temperatures of 2450/sup 0/ and 2220/sup 0/F, respectively. Limestone was used to scavenge the sulfur. The produced low-Btu gas was burned in a combustor. Bed temperature and inlet gas percent oxygen were varied in the course of testing. Key results are summarized as follows: the process was stable and readily controllable, and generated a free-flowing char product using coals with low (2220/sup 0/F) and high (2450/sup 0/F) ash fusion temperatures at bed temperatures of at least 1700/sup 0/ and 1800/sup 0/F, respectively; the gaseous product was found to have a total heating value of about 120 Btu/SCF at 1350/sup 0/F, and the practicality of cleaning the hot product gas and delivering it to the combustor was demonstrated; sulfur capture efficiencies above 80% were demonstrated for both low and high sulfur coals with a calcium/sulfur mole ratio of approximately two; gasification rates of about 5,000 SCF/ft/sup 2/-hr were obtained for coal input rates ranging from 40 to 135 lbm/hr, as required to maintain the desired bed temperatures; and the gaseous product yielded combustion temperatures in excess of 3000/sup 0/F when burned with preheated (900/sup 0/F) air. The above test results support the promise of the HITS system to provide a practical means of converting high sulfur coal to a clean gas for industrial applications. Sulfur capture, gas heating value, and gas production rate are all in the range required for an effective system. Planning is underway for additional testing of the system in the 12-in. fluid bed facility, including demonstration of the second stage char burnup reactor.},
doi = {10.2172/6039493},
url = {https://www.osti.gov/biblio/6039493}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 01 00:00:00 EST 1981},
month = {Wed Apr 01 00:00:00 EST 1981}
}