Dry scrubbing media compositions and methods of production and use
View Patent ↗Dry-scrubbing media compositions, methods of preparing same, and methods of use are provided. The compositions contain activated alumina and potassium carbonate. Optionally, activated carbon and other impregnates, such as sulfates of group 1A metals, are included in the compositions. The compositions exhibit improved efficiency and capacity for the removal of compounds such as chlorine or sulfur dioxide from an air-stream. The compositions are particularly useful for reducing or preventing the release of toxic gaseous compounds from the areas such as petroleum storage areas, refineries, drinking water systems, sewage treatment facilities, swimming pools, hospital morgues, animal rooms, and pulp and paper production sites.
1. A process for making a dry-scrubbing media composition comprising:
(a) mixing a dry feed of activated alumina, activated carbon and potassium carbonate in water;
(b) forming the mixture into at least one cohesive unit; and
(c) curing the unit,
wherein the cured unit comprises from about 15-25% by weight activated alumina, from about 15-25% by weight potassium carbonate, from about 15-20% by weight water and from about 30-55% activated carbon.
2. The process of claim 1 , wherein the step of forming the mixture into at least one cohesive unit comprises tumbling the mixture of activated alumina, potassium carbonate and activated carbon while spraying water on the mixture.
3. The process of claim 1 , wherein the mixture in water further comprises a sulfate of a Group IA metal; and wherein the curing step includes curing the unit until the sulfate is from about 1% to about 10% by weight of the composition.
4. A dry-scrubbing media composition produced by the process of claim 1 .
5. A process for making a dry-scrubbing media composition comprising:
(a) forming a mixture of from about 40-60% by weight activated carbon, 20-30% by weight activated alumina, and about 20-30% by weight potassium carbonate; and
(b) combining the mixture with a sulfate of a Group IA metal and water to form at least one cohesive unit; and
(c) curing the unit at a temperature of from about 100 to about 225 degrees Fahrenheit until the water is from about 5% to about 30% by weight of the composition, and the sulfate is from about 1% to about 10% by weight of the composition.
6. An adsorbent composition produced by the process of claim 5 .
7. A process for making a dry-scrubbing media composition comprising:
(a) forming a mixture of from about 20-30% by weight activated alumina, from about 40-60% by weight activated carbon, and from about 20-30% by weight potassium carbonate; and
(b) extruding the mixture through a die to form a matrix or honeycomb structure with long open channels.
8. The process of claim 7 , wherein the mixture further comprises an impregnate.
9. The process of claim 7 , wherein the impregnate comprises a sulfate of a Group IA metal.
10. The process of claim 9 , wherein the sulfate is sodium thiosulfate.