炭化温度对兰炭基成型活性炭性能的影响

INFLUENCE OF CARBONIZATION TEMPERATURE ON THE PERFORMANCE OF FORMED ACTIVATED CARBON BASED ON BLUE-COKE

兰炭末加入黏结剂混合成型,经炭化和活化制得成型活性炭.利用TG-DTG对热解过程中成型料的炭化行为进行探讨;测试不同炭化温度的成型活性炭的收率、抗压强度和碘吸附值,采用N2吸附法和红外光谱对450℃炭化成型活性炭的孔结构及表面化学性质进行表征.结果表明,炭化温度越高,成型活性炭的收率越小,抗压强度越小,碘吸附值越大.经450℃炭化、800℃水蒸气活化60min制得的活性炭表面具有大量的羟基、羰基和烃羟基等活性基团,比表面积为384.53m2/g,属于中孔隙发达的活性炭.

Blinder was put into blue-coke powder and mixed uniformity, then modeled. The formed activated carbon based on blue-coke was produced after carbonization and activation. Carbonized behavior of the material was studied by TG-DTG during the pyrogenation process. The yield, compressive strength and iodine adsorption value of formed activated carbon which were prepared at different carbonization temperature. The pore structure and surface chemical properties of activated carbon which were prepared at 450℃ carbonization temperature were characterized by N2 adsorption and infrared spectrum respectively. It is found that the yield and compressive strength of produets are reduced along with the rising of the carbonization temperature, while the iodine adsorption value is increased. There are a large number of hydroxyl, earbonyl, hydroxyaeid and other active groups on the surface of products prepared under this experimental condition： 450℃ and 800 ℃ were selected to be carbonization and activation temperature and activated for 60 rain using water vapor. And it is mesopores activated carbon.