Assertion: phosphoric acid | /r/CapableOf | treat raw material
Facets:
value: to produce an activated carbon
type: PURPOSE
value: via a gas activation process
type: MANNER
Source sentences:
text: In accordance with one embodiment, a method of producing an activated carbon comprises selecting a raw material for direct-activation, applying a solution of at least 50% phosphoric acid by weight at a ratio of from 0.01 pounds to 0.3 pounds of phosphoric acid solution per pound to the raw material selected for direct activation to produce a phosphoric acid treated raw material, and direct-activating the phosphoric acid treated raw material via a gas activation process to produce an activated carbon.
text: In accordance with another embodiment, a system to remove an impurity from a flue gas stream comprises a flue gas stream comprising at least one impurity suitable for adsorption, an injection point operable to facilitate the injection of an activated carbon into a flue gas stream, the flue gas stream comprising at least one impurity suitable for adsorption, and a collection device operable to collect the activated carbon after the activated carbon has adsorbed the at least one impurity, and facilitate removal from the flue gas stream of the activated carbon and the absorbed at least one impurity, wherein the injection point is upstream from a collection device so as to allow for sufficient residence time for adsorption of the at least one impurity onto the activated carbon, and wherein the activated carbon is prepared by a process comprising: selecting a raw material for direct-activation, applying a solution of at least 50% phosphoric acid by weight at a ratio of from 0.01 pounds to 0.3 pounds of phosphoric acid solution per pound to the raw material selected for direct activation to produce a phosphoric acid treated raw material, and direct-activating the phosphoric acid treated raw material via a gas activation process to produce the activated carbon.
text: In accordance with another embodiment, the system to remove an impurity from a flue gas stream recited initially, further comprising, after direct-activating the phosphoric acid treated raw material, washing the activated carbon with a solution comprising a second acid.