Influence of different decolorants on chlorophyll removal from oils
In order to screen decolorants with high efficiency for chlorophyll removal and provide reference for the precise use of decolorants in oils industrial production,soybean oil and rapeseed oil were used as examples to be decolorized with different kinds of decolorants,and the effects of decolorant parameters(specific surface area,mesoporous area and pore structure)on chlorophyll removal were analyzed.The results showed that the removal ability of three main mineral decolorants on chlorophyll was active clay＞attapulgite＞bentonite,and the removal effect of chlorophyll as positively correlated with the specific surface area or mesoporous area of active clay.There was no clear correlation between the removal effect of chlorophyll by activated carbon and its specific surface area,but it was positively correlated with its mesoporous area.When the mesoporous area of activated carbon increased from 3.8 m2/g to 275.4 m2/g,the removal rate of chlorophyll increased by 140.8％.The removal effect of chlorophyll with different kinds of decolorants such as activated carbon and active clay could not be clearly determined by mesoporous area alone,but should be determined by the macroporous pore volume of decolorants.In summary,for the same decolorants,the mesoporous area can be used to determine the strength of the decolorant's ability to remove chlorophyll.For different kinds of decolorants,the mesoporous area and macroporous pore volume are the key factors affecting the decolorant's effect on chlorophyll removal.
chlorophyll removaldecolorantdecolorizing by adsorptionmesoporous areamacroporous pore volume
NETL
NSTL
万方数据
维普
