Shaped lignocellulosic-based activated carbon

Details Shaped lignocellulosic-based activated carbon Shaped lignocellulosic-based activated carbon

1996-03-08

1997-11-25

Caldarola, Glenn

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Free carbon containing

502 80, 502423, 502428, 502429, 502174, 502180, 502182, B01J 2002

Patent

active

056912706

ABSTRACT:
Extruded pellets comprising a majority of activated carbon particles and a minority of a binder material are disclosed to provide improved performance when processed through tumbling equipment while the pellets are in their "green" state (i.e., pellets which are fresh off the extruder and contain activated carbon), binder material, and water and have not been subjected to any thermal processing (drying or calcining). The tumbling action both smooths and densifies (i.e., reduces void volume within) the pellet, thereby closing any cracks and greatly improving appearance. Improved performance results from an ability to increase the weight of carbon pellets which can be packed into a fixed volume and thereby increase the volumetric working capacity of the bed for adsorbing/desorbing vapors. Another benefit is to greatly reduce the levels of dust associated with the carbon, both the initial dust and the dust attrition.

REFERENCES:
patent: 4677086 (1987-06-01), McCue et al.

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