Layered double hydroxide sorbents for the removal of SO sub x from flue gas and other gas streams

Patent · Tue May 19 00:00:00 EDT 1992

OSTI ID:5047966

Pinnavaia, T J; Amarasekera, J; Polansky, C A

This patent describes a sorbent composition useful for removing sulfur oxides from flue gas and other gas streams. It comprises contacting the gas streams with a heated sorbent composition contacting the gas streams with a heated sorbent composition wherein the the sorbent before being heated has a layered double hydroxide structure of the formula (M{sub 1 {minus}x}{sup II}M{sub x}{sup III}(OH){sub 2})(A{sub n {minus}}){sub x/n} {center dot} pH{sub 2}O wherein M{sup II} is a divalent metal cation and M{sup III} is a trivalent metal cation, A is an interlayer anion of charge n{minus} which forms a volatile gas at elevated temperatures, x is between 0.8 and 0.12, and contains an additional transition metal cation which is impregnated as a salt in admixture with the the sorbent composition and p is a number representing moles of water, wherein the additional metal cation which is impregnated as a salt into the sorbent composition is selected from the group consisting of metal cations which provide oxidation of sulfur dioxide to sulfur trioxide in an amount sufficient that the layered double hydroxide structure promotes the oxidation of the sulfur dioxide to the sulfur trioxide at sulfur dioxide oxidation conditions.

• Assignee: Board of Trustees, Michigan State Univ., East Lansing, MI (United States)
• Patent Number(s): US 5114898; A
• Application Number: PPN: US 7-589424
• OSTI ID: 5047966
• Resource Relation: Patent File Date: 28 Sep 1990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLUE GAS
DESULFURIZATION
SULFUR DIOXIDE
AIR POLLUTION CONTROL
CHEMICAL COMPOSITION
GASEOUS WASTES
HYDROXIDES
SORBENT RECOVERY SYSTEMS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
HYDROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
020800* - Petroleum- Waste Management
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
400201 - Chemical & Physicochemical Properties