The present invention relates, in general terms, to methods of forming activated carbon. The method of forming activated carbon comprises mixing carbon black with an activation catalyst and heating the carbon black in order to form the activated carbon. The present invention also relates to applications of activated carbon as disclosed herein. In a preferred embodiment, the activation catalyst is selected from ammonium persulfate, sodium persulfate, potassium persulfate or a combination thereof.

A method for hydrolyzing cellulose into sugar to produce spherical capacitive carbon for the deep utilization of biomass and carbon materials. The present disclosure includes the following steps of: (1) crude cellulose pretreatment; (2) alkaline hydrolysis of cellulose; (3) separation of the cellulose from a hydrolyzed sugar liquor; (4) drying of an alkali-containing hydrolyzed sugar; (5) sintering of spherical capacitive carbon; (6) capacitive carbon post-processing; and (7) alkali recycling. In the method, biomass is used as a raw material, high-purity cellulose and hydrolyzed sugar are obtained through deep hydrolysis, the spherical capacitive carbon is sintered with the hydrolyzed sugar instead of sucrose and starch, and alkali is recycled. Pollution and waste are not generated, and more than 80% of the alkali can be recycled.

The present invention relates to novel sulfur-doped carbonaceous porous materials. The present invention also relates to processes for the preparation of these materials and to the use of these materials in applications such as gas adsorption, mercury and gold capture, gas storage and as catalysts or catalyst supports.

The present invention relates to novel sulfur-doped carbonaceous porous materials. The present invention also relates to processes for the preparation of these materials and to the use of these materials in applications such as gas adsorption, mercury and gold capture, gas storage and as catalysts or catalyst supports.

The present invention relates to a carbonaceous material having a pore volume determined by performing Grand Canonical Monte Carlo simulation on an adsorption-desorption isotherm of carbon dioxide of 0.05 cm.sup.3/g or more and 0.20 cm.sup.3/g or less, and a ratio of desorption amount to adsorption amount (desorption amount/adsorption amount) at a relative pressure of 0.01 in the adsorption-desorption isotherm of 1.05 or more.

The present invention relates to a carbonaceous material having a pore volume determined by performing Grand Canonical Monte Carlo simulation on an adsorption-desorption isotherm of carbon dioxide of 0.05 cm.sup.3/g or more and 0.20 cm.sup.3/g or less, and a ratio of desorption amount to adsorption amount (desorption amount/adsorption amount) at a relative pressure of 0.01 in the adsorption-desorption isotherm of 1.05 or more.

The present disclosure pertains to materials for CO.sub.2 adsorption at pressures above 1 bar, where the materials include a porous material with a surface area of at least 2,800 m.sup.2/g, and a total pore volume of at least 1.35 cm.sup.3/g, where a majority of pores of the porous material have diameters of less than 2 nm as measured from N.sub.2 sorption isotherms using the BET (Brunauer-Emmett-Teller) method. The present disclosure also pertains to materials for separation of CO.sub.2 from natural gas at partial pressures of either component above 1 bar, where the materials include a porous material with a surface area of at least 2,200 m.sup.2/g, and a total pore volume of at least 1.00 cm.sup.3/g, where a majority of pores of the porous material have diameters of greater than 1 nm and less than 2 nm as measured from N.sub.2 sorption isotherms using the BET method.

In an activated carbon for adsorbing a noble metal from an aqueous solution containing the noble metal, the difference (absolute value) between a zeta-potential in a 10 mmol/L aqueous solution of sodium tetraborate and a zeta-potential in a 0.01 mmol/L aqueous solution of sodium tetraborate is adjusted to not more than 18 mV and the pore volume of pores with a pore radius of not more than 1 nm is adjusted to 150 to 500 mm.sup.3/g. The activated carbon of the present invention may have a carbohydrate solution decolorizing performance of not less than 30%. The aqueous solution containing the noble metal may be a plating wastewater. According to the present invention, a noble metal can efficiently be adsorbed (or recovered) from a solution containing the noble metal.

An activated carbon manufacturing method may include preparing activated carbon precursors, carbonizing the activated carbon precursors by performing a heat treatment on the activated carbon precursors, equalizing the activated carbon precursors which were carbonized, in the carbonizing, by grinding the activated carbon precursors, activating the activated carbon precursors by inserting an oxidizing agent and distilled water into the equalized activated carbon precursors, and performing a heat treatment on the activated carbon precursors, and introducing a nitrogen-based functional group into a surface of the activated carbon precursors by mixing the activated carbon precursors, a nitrogen material, and a solvent to perform reaction on the activated carbon precursors.

A method of making activated carbon including: compressing a mixture of carbonaceous source material and an alkali source material into a first solid form; and activating the first solid form to a form an activated carbon having a second solid form.