Study of an adsorption process using silicalite for sulfur dioxide removal from combustion gases

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Ind. Eng. Chem. Res.; (United States)

DOI:https://doi.org/10.1021/ie00073a025· OSTI ID:5156808

Gollakota, S V; Chriswell, C D

An adsorption process using silicalite, a hydrophobic molecular sieve, was investigated for the removal of sulfur dioxide from combustion gases. Silicalite, which is a polymorph of silicon dioxide, was found to remove SO/sub 2/ from simulated stack gases to give SO/sub 2/-free effluents. Silicalite adsorbs sulfur dioxide in the presence of major components of stack gases such as nitrogen, oxygen, carbon dioxide, and water vapor. This process has the potential to reduce the sulfur dioxide content of hot combustion gases before they enter the turbine in a direct coal-fired power system. The sulfur dioxide adsorption capacity of silicalite was determined at temperatures from 25 to 800/sup 0/C and pressures from 1 to 21.4 atm. The breakthrough curves were modeled based on the equation of Bohart and Adams. The adsorption characteristics were evaluated as a function of various parameters which are necessary for the design of an adsorber. The adsorption-desorption properties of silicalite were compared with those of active carbon and a zeolite.

• Research Organization: Ames Lab., Fossil Energy Program, Iowa State Univ., Ames, IA 50011 (US)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5156808
• Journal Information: Ind. Eng. Chem. Res.; (United States), Journal Name: Ind. Eng. Chem. Res.; (United States) Vol. 27:1; ISSN IECRE
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ADSORBENTS
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
COAL-FIRED GAS TURBINES
ELEMENTS
GAS TURBINES
GASEOUS WASTES
HIGH TEMPERATURE
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MACHINERY
MATERIALS
MINERALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REMOVAL
SILICATES
SILICON COMPOUNDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TURBINES
TURBOMACHINERY
WASTES
ZEOLITES