摘要
以核桃壳生物油蒸馏残渣为原料,采用KOH活化法制备活性炭。研究了不同炭化温度和升温速率对制备活性炭孔隙结构的影响,并采用傅里叶红外光谱(FTIR)、X射线衍射(XRD)和扫描电子显微镜(SEM)等方法对炭化料和活化料进行表征。结果表明,炭化温度和升温速率均会影响炭化料的碳质微晶尺寸和表面官能团强度,核桃壳生物油蒸馏残渣在升温速率10℃/min、炭化温度400℃(2h)和KOH活化1h(碱炭比为3∶1)条件下得到的比表面积最大,为2056m^2/g,碘吸附值为1891mg/g,亚甲基蓝吸附值为407mg/g。本实验为生物油蒸馏残渣的利用提供了一种新的途径。
Activated carbons were prepared from walnut shell bio-oil distillation residues using the KOH activation method. Two factors which have an impact on the pore structure of the activated carbon were investigated,(i) carbonization temperature and (ii) heating rate. The carbon precursors and activated carbons were characterized by FTIR, XRD and SEM. Results showed that carbonization temperature and heating rate both affect the micro-crystalline size and surface functional groups which play a decisive role in the activation process. The activated carbon prepared from walnut shell bio-oil distillation residues treated with a 10 ℃/min heating rate to 400 ℃, where they were held for 2 h and then activated with KOH (3 ∶1), has the highest specific surface area (2 056 m ^2/g).Its iodine adsorption capacity is 1891 mg/g and its adsorption capacity of methylene blue is 407 mg/g. This study confirmed that the walnut shell bio-oil distillation residue can be used as a raw material for the preparation of activated carbon and provides a new way of using bio-oil distillation residues.
作者
唐国徐
张立强
朱谢飞
朱锡锋
TANG Guo-xu;ZHANG Li-qiang;ZHU Xie-fei;ZHU Xi-feng(School of Engineering Science, University of Science and Technology of China, Hefei 230026, China)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2019年第5期434-440,共7页
New Carbon Materials
基金
国家自然科学基金项目(51676179)~~
关键词
生物油
蒸馏残渣
活性炭
KOH活化
Bio-oil
Distillation residues
Activated carbon
KOH activation
