摘要
以竹节为原料,采用水蒸气活化法制备提金活性炭,研究温度、保温时间、水蒸气流量等因素对活性炭性能的影响,并对其孔隙结构进行表征。结果表明:随着温度和保温时间的增大,活性炭的吸附性能总体呈上升趋势;随着水蒸气流量的增加,活性炭的吸附性能呈先升后降的趋势;N2吸附等温线的分析表明,竹节活性炭具有发达的微孔、中孔、大孔结构。在较佳的试验条件下,活性炭的强度、亚甲基蓝吸附值、碘吸附值、比表面积、总孔容积和微孔容积分别为97.5%,262mg·g-1,1072.7mg·g-1,1334.2m2.g-1,0.671mL.g-1和0.574mL.g-1。
The preparation of gold extracting activated carbon from bamboo knot by steam was studied.The effect of temperature,holding time and steam flow rate on the property of activated carbon was discussed.The pore structures of the activated carbon were characterized by N_2 adsorption isotherm.The result showed that the adsorption capability of activated carbon increased with the increase of temperature and holding time.The adsorption capability of activated carbon increased to a maximum and then decreased with the steam flow rate increasing.The analysis of N_2 adsorption isotherm showed that the micropore,mesopore and macropore of activated carbon was development.Under optimized experimental condition,the intensity,the adsorption value of methylene blue,iodine,BET,total pore volume,micropore volume of the samples were 97.5%,262 mg·g^-1,1 072.7 mg·g^-1,1 334.2 m2·g^-1,0.671 mL·g^-1 and 0.574 mL·g^-1,respectively.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2009年第12期124-128,共5页
Scientia Silvae Sinicae
基金
国家林业局南方山地用材林培育重点实验室资助
关键词
提金活性炭
竹节
水蒸气
孔隙结构
gold extracting activated carbon
bamboo knot
steam
pore structure
