Carbonaceous material with high micropore and low macropore volu

Details Carbonaceous material with high micropore and low macropore volu Carbonaceous material with high micropore and low macropore volu

1990-05-25

1991-12-10

Konopka, Paul E.

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

Solid sorbent

Free carbon containing

502416, 502420, 502433, 502436, 502437, C01B 3110, B01J 2020

Patent

active

050718207

ABSTRACT:
A method which minimizes macropore formation while producing microporous carbon comprises a two stage process. Firstly, the carbon is heated to a temperature in the range of about 150.degree. to about 200.degree. C. in the presence of oxygen for a time in the range of about forty-five to about seventy-five minutes, then purging the reaction environment of oxygen at this temperature with nitrogen. In the second stage, the carbon is heated to a temperature in the range of about 750.degree. to about 900.degree. C. under a stream of nitrogen for a time in the range of about fifteen to forty-five minutes. The process is repeated a number of times, the number being dependent on the extent of microporosity desired.

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patent: 4880765 (1989-11-01), Khublauch et al.
Garrido, J. et al., "The Effect of Gasification by Air (623K) or CO.sub.2 (1098K) in the Development of Microporosity in Activated Carbons", J. Chem. Soc., Faraday Trans. 1, 1987, 83, 1081-1088.
Mahajan, O. P. et al., "Surface-Treated Activated Carbon for Removal of Phenol from Water", Separation Science and Technology, 15(10), pp. 1733-1752, 1980.
Barton, S. S. et al., "Surface Studies of Carbon: Acidic Oxides on Spheron 6", Carbon, 1973, vol. 11, pp. 649-654.

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