活性炭废食用油脱色研究.pdf

摘要

废食用油中的色素杂质对其利用有很大的影响论文采用吸附性能测定气
体吸附等温线扫描电子显微镜等方法对典型的煤基活性炭和木质活性炭的结
构形貌性能进行了测定和表征经探索性实验研究确定了活性炭废食用油脱
色的工艺路线及主要工艺参数在此基础上详细考察了活性炭种类粒度以
及脱色反应温度时间搅拌频率离心分离时间等工艺参数对脱色效果的影响
讨论关联了活性炭结构性能与其废食用油脱色能力间的关系结果表明活性
炭废食用油脱色工艺的较优工艺参数是活性炭粒度 - 脱色温度 95
脱色时间 40min 离心时间 3min 搅拌频率 10r/min 在加炭量为 4%时
以低变质程度褐煤和弱粘煤为原料的活性炭脱色率达到了 42%以上以粘煤为
原料的活性炭脱色率为 % 以无烟煤原料的活性炭脱色率为 % 以
椰壳为原料的活性炭脱色率是 % 活性炭的中孔孔容积中孔比表面积和
平均孔径与其脱色效果相关性好活性炭的总孔容积总比表面积微孔比表面
积微孔孔容积碘值和亚甲蓝值与其脱色效果相关性不大

关键词废食用油脱色活性炭
ABSTRACT

Some impurities in waste vegetal oil cause the waste vegetal oil in deep, even
dark color, and limit its application in the preparation of biology diesel oil. Analyses
by adsorption performance testing, N2 adsorption and scanning electron microscope
were carried out with typical activated carbons with the aim to characterize their pore
structure, morphology and adsorption abilities. Then the technological flow sheet and
primary parameters for decoloration of waste vegetal oil by these activated carbons
were studied and the influences such as activated carbon precursors, size and process
parameters including temperature, time, agitating frequency, centrifugal separation
time on decoloration were investigated in detail, and the relation between activated
carbon performance and its decoloration ability for waste vegetal oil were discussed
and related. The results show that optimized parameters for decolorizing waste
vegetal oil by activated carbon adsorption can be concluded as particles size of
activated carbon - mm, decolorized temperature 95 , decolorized time
40min, centrifugal time 3min, agitating frequency 10r/min. When the quantity of
carbon added is 4%, the decolorized rate by activated carbon based on lignite and
long flame coal reaches 42%, by sticky coal-based activated carbon is %, by
anthracite-based activated carbon is %, and by coconut shell-based activated
carbon is %. The relationship betw