Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: (231 pages) : digital, PDF file
Additional Creators:: University of Texas at Austin, 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:

Removal of sulfur dioxide (SO₂) from the flue gas of coal- burning power plants can be achieved by duct spray drying using calcium hydroxide (Ca(OH)₂) slurries. A primary objective of this research was to discover the aspects of mass transfer into Ca(OH)₂ slurries which limit SO₂ absorption. A bench- scale stirred tank reactor with a flat gas/liquid interface was used to simulate SO₂ absorption in a slurry droplet. The absorption rate of SO₂ from gas concentrations of 500 to 5000 ppm was measured at 55°C in clear solutions and slurries of Ca(OH)₂ up to 1.0 M (7 wt percent). Results are reported in terms of the enhancement factor, {O}. This research will allow prediction of conditions where the absorption of SO₂ in Ca(OH)₂ slurries can be enhanced by changes to liquid phase constituents (under which SO₂ absorption is controlled by liquid film mass transfer). Experiments in the stirred tank have shown that SO₂ absorption in a 1.0 M Ca(OH)₂ slurry was completely dominated by gas film mass transfer with a large excess of Ca(OH)₂ but becomes controlled by liquid film resistance at greater than 50 percent Ca(OH)₂ utilization. (VC)

Report Numbers:

E 1.99:doe/pc/88874-t16-vol.2
doe/pc/88874-t16-vol.2

Subject(s):

Other Subject(s):

Note:

Published through SciTech Connect.
01/29/1992.
"doe/pc/88874-t16-vol.2"
"DE92013481"
Jozewicz, W. . Environmental Systems Div; Rochelle, G.T. . Dept. of Chemical Engin.
Acurex Corp., Research Triangle Park, NC (United States). Environmental Systems Div.

Funding Information:

AC22-88PC88874

View MARC record | catkey: 13843077