고흡착능을 가지고 탈황탈질성능이 우수하며, 또한 이동층 방식의 건식 탈황탈질 공정에서의 순환 사용에 견디는 고강도의 활성탄을 제공한다. 석탄을 원료로 하여 제조된 활성탄으로서, 휘발분을 2.0% 이상, 탄소의 함유율을 87∼95%로 함으로써 소요 세공 용적으로서 탈황 성능을 높이고, Fe2O3+TiO2 성분을 0.7% 이상으로 함으로써 경제성을 유지하면서 탈질 성능을 높임과 동시에 강도를 확보하고, K2O+Na2O+CaO+MgO 성분을 0.3∼1.0%로 함으로써 탈황시의 SO2 +H2O 성분에 의한 활성탄의 세공 용해를 제어하고, 탈질시의 암모니아 흡착에 의한 황산암모늄 생성에 의한 분화를 억제하여 내구성을 높인다. 석탄으로부터 저온 건류에 의하여 얻어진 반성 코크스를 주원료로 하는 활성탄의 제조방법에 있어서, 반성 코크스의 원료탄으로서, 연화 용융상태에 있는 온도에서의 NMR 측정 결과로부터 산출한 이동성 수소성분의 양이 30% 이하인 석탄을 사용한다.
The present invention provides high-strength activated carbon having a high adsorption capacity, excellent in desulfurization and denitration performance and capable of withstanding re-circulated use in a moving bed type dry desulfurization and denitration process. The present invention is activated carbon produced from coal wherein: desulfurization performance is enhanced by securing required pore volume by controlling volatile matter to 2.0% or more and the content of fixed carbon to 87 to 95%; denitration performance is enhanced and strength is secured, while economical efficiency is maintained, by controlling the amount of an Fe2 O3 + TiO2 component to 0.7% or more; the fusion of the pores of the activated carbon by the SO3 + H2 O component during desulfurization is suppressed by controlling the amount of a K2 O + Na2 O + CaO + MgO component to 0.3 to 1.0%; and durability is enhanced by suppressing the powdering during denitration caused by the ammonium sulfate formation resulting from the adsorption of ammonia. Further, the present invention is a method of producing activated carbon by using semicoke produced from coal by low-temperature carbonization as the main material: in which method the kind of coal, wherein the amount of the mobile hydrogen components calculated from the results of the NMR measurement at a temperature at which the coal is in a plastic state is 30% or less, is used as the material coal of the semicoke.