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Title: Stabilization and/or regeneration of spent sorbents from coal gasification

Abstract

The objective of this investigation is to determine the effects of SO{sub 2} partial pressure and reaction temperature on the conversion of sulfide containing solid wastes from coal gasifiers to stable and environmentally acceptable calcium-sulfate, while preventing the release of sulfur dioxide through undesirable side reactions during the stabilization step. An additional objective of this program is to investigate the use of the Spent Sorbent Regeneration Process (SSRP) to regenerate spent limestone, from a fluidized-bed gasifier with in-bed sulfur capture, for recycling to the gasifier. To achieve these objectives, selected samples of partially sulfided sorbents will be reacted with oxygen at a variety of operating conditions under sufficient SO{sub 2} partial pressure to prevent release of sulfur from the solids during stabilization that reduces the overall sorbent utilization. Partially sulfided limestone will also be regenerated with water to produce calcium hydroxide and release sulfur as H{sub 2}S. The regenerated sorbent will be dewatered, dried and pelletized. The reactivity of the regenerated sorbent toward H{sub 2}S will also be determined. During this quarter sulfidation tests were conducted in a quartz fluidized-bed reactor in which the selected calcium-based sorbents were first calcined and then were reacted with hydrogen sulfide at ambient pressuremore » and 1650{degree}F. These tests were conducted with each sorbent in two particle sizes. Chemical analyses of the partially sulfided sorbents indicate that the extent of sulfidation was in the range of 40--50%. The partially sulfided material will be reacted with oxygen to determine the effects of temperature and SO{sub 2} partial pressure on the stabilization of the calcium sulfide in solid waste materials. 23 refs., 1 fig., 2 tabs.« less

Authors:
Publication Date:
Research Org.:
Institute of Gas Technology, Chicago, IL (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5877824
Report Number(s):
DOE/PC/91334-T4
ON: DE92007888
DOE Contract Number:  
FG22-91PC91334
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CALCIUM SULFIDES; STABILIZATION; DESULFURIZATION; SOLID WASTES; DOLOMITE; SULFIDATION; FUEL GAS; LIMESTONE; RECYCLING; MATERIALS RECOVERY; SORBENT RECOVERY SYSTEMS; CALCINATION; CALCIUM SULFATES; CHEMICAL REACTION KINETICS; COAL GASIFICATION; EXPERIMENTAL DATA; FLOWSHEETS; FLUIDIZED BEDS; HYDROGEN SULFIDES; PARTIAL PRESSURE; PROGRESS REPORT; SULFATION; SULFUR DIOXIDE; TEMPERATURE EFFECTS; TEMPERATURE RANGE; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBONATE MINERALS; CARBONATE ROCKS; CHALCOGENIDES; CHEMICAL REACTIONS; DATA; DECOMPOSITION; DIAGRAMS; DOCUMENT TYPES; FLUIDS; FUELS; GAS FUELS; GASES; GASIFICATION; HYDROGEN COMPOUNDS; INFORMATION; KINETICS; MANAGEMENT; MINERALS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PROCESSING; PYROLYSIS; REACTION KINETICS; RECOVERY; ROCKS; SEDIMENTARY ROCKS; SULFATES; SULFIDES; SULFUR COMPOUNDS; SULFUR OXIDES; THERMOCHEMICAL PROCESSES; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 010402* - Coal, Lignite, & Peat- Purification & Upgrading; 400201 - Chemical & Physicochemical Properties; 010800 - Coal, Lignite, & Peat- Waste Management

Citation Formats

Abbasian, J. Stabilization and/or regeneration of spent sorbents from coal gasification. United States: N. p., 1991. Web. doi:10.2172/5877824.
Abbasian, J. Stabilization and/or regeneration of spent sorbents from coal gasification. United States. https://doi.org/10.2172/5877824
Abbasian, J. 1991. "Stabilization and/or regeneration of spent sorbents from coal gasification". United States. https://doi.org/10.2172/5877824. https://www.osti.gov/servlets/purl/5877824.
@article{osti_5877824,
title = {Stabilization and/or regeneration of spent sorbents from coal gasification},
author = {Abbasian, J},
abstractNote = {The objective of this investigation is to determine the effects of SO{sub 2} partial pressure and reaction temperature on the conversion of sulfide containing solid wastes from coal gasifiers to stable and environmentally acceptable calcium-sulfate, while preventing the release of sulfur dioxide through undesirable side reactions during the stabilization step. An additional objective of this program is to investigate the use of the Spent Sorbent Regeneration Process (SSRP) to regenerate spent limestone, from a fluidized-bed gasifier with in-bed sulfur capture, for recycling to the gasifier. To achieve these objectives, selected samples of partially sulfided sorbents will be reacted with oxygen at a variety of operating conditions under sufficient SO{sub 2} partial pressure to prevent release of sulfur from the solids during stabilization that reduces the overall sorbent utilization. Partially sulfided limestone will also be regenerated with water to produce calcium hydroxide and release sulfur as H{sub 2}S. The regenerated sorbent will be dewatered, dried and pelletized. The reactivity of the regenerated sorbent toward H{sub 2}S will also be determined. During this quarter sulfidation tests were conducted in a quartz fluidized-bed reactor in which the selected calcium-based sorbents were first calcined and then were reacted with hydrogen sulfide at ambient pressure and 1650{degree}F. These tests were conducted with each sorbent in two particle sizes. Chemical analyses of the partially sulfided sorbents indicate that the extent of sulfidation was in the range of 40--50%. The partially sulfided material will be reacted with oxygen to determine the effects of temperature and SO{sub 2} partial pressure on the stabilization of the calcium sulfide in solid waste materials. 23 refs., 1 fig., 2 tabs.},
doi = {10.2172/5877824},
url = {https://www.osti.gov/biblio/5877824}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}