ACTIVATED CARBON FROM CHERRY STONES

被引:125
作者
LUSSIER, MG [1 ]
SHULL, JC [1 ]
MILLER, DJ [1 ]
机构
[1] MICHIGAN STATE UNIV,DEPT CHEM ENGN,E LANSING,MI 48824
关键词
ACTIVATED CARBON; CHERRY STONES;
D O I
10.1016/0008-6223(94)90144-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Fruit stones constitute a significant waste disposal problem for the fruit-processing industry. High-quality activated carbon can be produced from waste cherry stones: the activated carbon is low in impurities and has an adsorption capacity that compares favorably with commercial activated carbons. Activation at 800 degrees C in steam for 2-3 hours, following initial carbonization, produces an activated carbon in about 10% yield (by weight) of the initial cherry stone. The activated carbons produced have surface areas (GO, adsorption) as high as 1200 m(2)/g and CCl4 numbers of 70-80. Activation in carbon dioxide requires higher temperatures (900 degrees C) and gives a carbon of slightly lower activity. Carbon from the hull, or hard outer portion of the fruit stone, provides essentially all of the adsorption capacity; the inner kernel does not form a microporous material. The hull structure is dominated by 0.4-micron pores which facilitate access to internal microporosity. This structure requires that the carbon be ground to less than 75 micron particles to achieve reasonable adsorption rates.
引用
收藏
页码:1493 / 1498
页数:6
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