Nonequilibrium sulfur capture and retention in an air cooled slagging coal combustor. Quarterly technical progress report, 1996

Technical Report · Fri Nov 01 04:00:00 EST 1996

DOI:https://doi.org/10.2172/436388· OSTI ID:436388

Zauderer, B

The objective of this 24 month project is to determine the degree of sulfur retention in slag in a full scale cyclone coal combustor with sulfur capture by calcium oxide sorbent injection into the combustor. This sulfur capture process consists of two steps: Capture of sulfur with calcined calcium oxide followed by impact of the reacted sulfur-calcium particles on the liquid slag lining the combustor. The sulfur bearing slag must be removed within several minutes from the combustor to prevent re-evolution of the sulfur from the slag. To accomplish this requires slag mass flow rates in the range of several 100 lb/hr. To study this two step process in the combustor, two groups of tests are being implemented. In the first group, calcium sulfate in the form of gypsum, or plaster of Paris, was injected in the combustor to determine sulfur evolution from slag. In the second group, the entire process is tested with limestone and/or calcium hydrate injected into the combustor. This entire effort consists of a series of up to 16 parametric tests in a 20 MMtu/hr slagging, air cooled, cyclone combustor. During the present quarterly reporting period ending September 30,1996, three tests in this project were implemented, bringing the total tests to 5. In addition, a total of 10 test days were completed during this quarter on the parallel project that utilizes the same 20 MMtu/hr combustor. The results of that project, especially those related to improved slagging performance, have a direct bearing on this project in assuring proper operation at the high slag flow rates that may be necessary to achieve high sulfur retention in slag.

• Research Organization: Coal Tech Corp., Merion Station, PA (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
• DOE Contract Number: AC22-95PC95102
• OSTI ID: 436388
• Report Number(s): DOE/PC/95102--T5; ON: DE97051140
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AIR POLLUTION ABATEMENT
CALCIUM OXIDES
CAPTURE
COAL
COMBUSTION PRODUCTS
CYCLONE COMBUSTORS
EXPERIMENTAL DATA
GYPSUM
GYPSUM CEMENTS
LIMESTONE
PARTICLE SIZE
PROGRESS REPORT
QUANTITATIVE CHEMICAL ANALYSIS
SLAGS
SORBENT INJECTION PROCESSES
SORPTIVE PROPERTIES
SULFUR
SULFUR DIOXIDE