Activated carbon and method of producing the same

The present invention provides a high strength activated carbon having high absorption ability, excellent desulfurization and denitration performance and durability, in recycling use, in a moving bed type desulfurization and denitration dry process. The present invention is an activated carbon produ...

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Bibliographische Detailangaben
Hauptverfasser: KINOSHITA, MASATUGU, NAKAUMA, YOSHINORI, UEDA, HARUHISA, SAITO, KOJI, KAMIYAMA, HISAO
Format: Patent
Sprache:eng
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Zusammenfassung:The present invention provides a high strength activated carbon having high absorption ability, excellent desulfurization and denitration performance and durability, in recycling use, in a moving bed type desulfurization and denitration dry process. The present invention is an activated carbon produced using coal as the raw material characterized by: enhancing the desulfurization performance as a prescribed volume of fine pores by means of controlling the volatile matter to 2.0% or more and the carbon content to 87 to 95% and thus securing the carbon component; enhancing the denitration performance and securing the strength while maintaining the economical efficiency by means of controlling the Fe2O3+TiO2 component to 0.7% or more; suppressing the dissolution of the fine pores of the activated carbon caused by the SO2+H2O component during the desulfurization, also suppressing the powdering of the activated carbon caused by ammonium sulfate, generated by the absorption of ammonia during the denitration, and thus enhancing the durability by means of controlling the K2O+Na2O+CaO+MgO component to 0.3 to 1.0%. Further, the present invention is a method of producing an activated carbon by: using coalite, produced by subjecting coal to low temperature carbonization at a temperature of 300 to 600 J, as the main raw material and coal with coking capacity as the auxiliary raw material; and applying carbonization and activation treatment to briquettes, produced by mixing and then forming the main and auxiliary materials together with a binder, characterized by using: coal having 30% or less of the mobile hydrogen component calculated from the NMR result measured at a temperature where the coal is in a softened and melted state as the coal for making coalite which is the main raw material; and coal having 35 to 45% of the mobile hydrogen component calculated from the NMR result measured at a temperature where the coal is in a softened and melted state as the coal with coking capacity which is the auxiliary raw material.