Stabilization and/or regeneration of spent sorbents from coal gasification. Technical report, September 1--November 30, 1991 [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 12 pages : digital, PDF file
Additional Creators:: Institute of Gas Technology, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

The objective of this investigation is to determine the effects of SO₂ 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 SO₂ 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 H₂S. The regenerated sorbent will be dewatered, dried and pelletized. The reactivity of the regenerated sorbent toward H₂S 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°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 SO₂ partial pressure on the stabilization of the calcium sulfide in solid waste materials. 23 refs., 1 fig., 2 tabs.

Report Numbers:

E 1.99:doe/pc/91334--t4
doe/pc/91334--t4

Subject(s):

Other Subject(s):

Note:

Published through SciTech Connect.
12/31/1991.
"doe/pc/91334--t4"
"DE92007888"
Abbasian, J.

Type of Report and Period Covered Note:

Quarterly; 10/01/1991 - 12/31/1991

Funding Information:

FG22-91PC91334

View MARC record | catkey: 13841129