摘要
以云南曲靖褐煤、陕西神府烟煤和山西大同烟煤与有机添加剂的混合物为原料,经过挤出成型、炭化、水蒸气活化得到蜂窝状活性炭,采用N2吸附、压力试验、热天平等测试手段对得到的样品进行了分析表征。结果显示,煤种和活化程度显著影响蜂窝状活性炭孔结构、着火温度和机械强度,以大同煤为原料制备的蜂窝状活性炭具有高的比表面积(884m2/g)、着火温度(535℃)和机械强度(>13MPa)。煤基蜂窝状活性炭的机械强度随大孔容积的增加呈下降趋势。煤基蜂窝状活性炭的着火点与其中的挥发份含量成反比关系,而与灰分含量无关。
Activated carbon honeycombs （ACHs） were prepared by extrusion of honeycombs from a mixture of coal, coal tar, bean oil, methylcellulose and water, followed by carbonization and steam activation. Three Chinese coals, Qujing, Shenfu and Datong, were used as carbon precursors. The ACH monoliths obtained were characterized by N2 adsorption, thermo-gravimetry and compression tests. Results show that both coal rank and activation time have great a impact on the pore size distribution and mechanical strength. The ACHs from Datong obtained under optimum conditions have the highest BET surface area（ 884 m^2/g）, the highest ignition temperature （535 ℃ ） and the highest mechanical strength（ 〉 13 MPa） among the three coals. The mechanical strength of the ACH monoliths decreases with increasing macro-pore volume. The ignition temperature is hardly affected by ash content but decreases with increasing volatile content.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2007年第1期28-34,共7页
New Carbon Materials
基金
国家自然科学基金(90210034
20503038)~~
关键词
活性炭
蜂窝体
热分析
机械强度
Activated carbon
Honeycomb monolith
Thermal analysis
Mechanical strength
