Technique for surface oxidation of activated carbon

Patent · Tue Oct 27 00:00:00 EST 1987

OSTI ID:5926975

Sircar, S; Golden, T C

A method of activating a carbon adsorbent is described, which comprises oxidizing the surface of the carbon adsorbent with a mild oxidizing acid in the presence of a metal oxidation catalyst at an elevated temperature and boiling the mixture of the carbon adsorbent, mild oxidizing acid and metal oxidation catalyst to dryness. Then rinse the surface oxidizing carbon adsorbent with water; and dry the rinsed surface oxidized carbon adsorbent. In a process for the removal of water or carbon dioxide from a gas stream containing water or carbon dioxide of the type wherein the gas stream containing water or carbon dioxide is contacted with a solid phase adsorbent under pressure-swing adsorption or thermal-swing adsorption processing conditions, the improvement is described comprising utilizing an adsorbent produced by the activation of a carbon adsorbent. The activation comprises oxidizing the surface of the carbon adsorbent with a mold oxidizing acid in the presence of a metal oxidation catalyst at an elevated temperature and boiling the mixture of the carbon adsorbent, mild oxidizing acid and metal oxidation catalyst to dryness. Then rinse the surface oxidized carbon adsorbent with water; and dry the rinsed surface oxidized carbon adsorbent.

• Assignee: Air Products and Chemicals, Inc., Allentown, PA
• Patent Number(s): US 4702749
• OSTI ID: 5926975
• Resource Relation: Patent File Date: Filed date 24 Jun 1986
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACTIVATED CARBON
ACIDIFICATION
OXIDATION
SORPTIVE PROPERTIES
ADSORBENTS
BOILING
CARBON DIOXIDE
CATALYSTS
DESORPTION
GASES
METALS
SURFACES
WATER
CARBON
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
HYDROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SURFACE PROPERTIES
400201* - Chemical & Physicochemical Properties