| abstract |
Highly microporous activated carbons are prepared by further chemical activation of activated carbon comprising activation of an active carbon precursor material with an alkali solution, pre-drying the blend to below about 25% moisture content, heat treating this blend at from about 650° to about 1100°C, and acid washing and drying the microporous activated carbon products, which are characterized by greater than 50% of total pore volume comprising pores of from above 8Å to 20Å in width and greater than 70% of total pore volume comprising pores of less than 20Å in width and greater than 95% of total pore volume comprising pores of less than 50Å in width and which is disclosed for storing gaseous hydrocarbon fuel in storage containers under relatively low pressure. |