High activity, high density activated carbon
AssigneeWestvaco Corporation
InventorsEdward D. Tolles, Mitchell S. Dimitri, Charles C. Matthews
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Abstract
Lignocellulosic carbonaceous material is activated to produce a high activity, high density gas-phase activated carbon under conditions which effectively alter the particle pore size distribution to optimize the carbon's mesoporosity. Alternative processes are disclosed for producing the carbon, as are its application in emission control for vehicles.
Claims15
A high activity, high density, lignocellulose-based activated carbon particulate characterized by a butane activity of from about 50 to about 80 g/100 g, a butane working capacity of from above 15 to about 25 g/100 cm.sup.3, an apparent density of from about 0.25 to about 0.40 g/cm.sup.3, greater than about 50% of total carbon particle volume comprising pores of a width from about 1.8 to about 50 nm, and less than about 20% of total carbon particle volume comprising pores of a width greater than about 50 nm.
An improved lignocellulosic-based, high activity and high density activated carbon particulate characterized by a butane activity from about 50 to about 80 g/100 g and an apparent density of from about 0.25 to about 0.40 g/cm.sup.3, wherein the improvement comprises the carbon being further characterized by a butane working capacity of from above 15 to about 25 g/100 cm.sup.3, greater than about 50% of total carbon particle volume comprising pores of a width from about 1.8 to about 50 nm, and less than about 20% of total carbon particle volume comprising pores of a width greater than about 50 nm.
Dependencies are inferred from the claim text.