本文目录一览:
- 1、活性炭是什么?
- 2、什么是活性炭
- 3、活性炭是什么意思
活性炭是什么?
1、活性炭是由木质、煤质和石油焦等含碳的原料经热解、活化加工制备而成,具有发达的孔隙结构、较大的比表面积和丰富的表面化学基团,特异性吸附能力较强的炭材料的统称。
2、活性炭的作用:活性炭一般用作过滤和脱色,作还原剂和吸收气体。而根据其应用领域的不同,活性炭的具体作用又有所不同。
3、在家中,活性炭可以净化空气,祛除有害物质等。正是由于活性炭的这一系列优点,很多家庭也开始使用活性炭来提高家中的空气质量。
4、颗粒活性炭常常应用于吸附分子,颗粒活性炭吸附性决定应用性,而吸附性和各种炭型的孔大小分布相关。
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什么是活性炭
活性炭是一种含碳材料制成的外观呈黑色,内部孔隙结构发达,比表面积大、吸附能力强的一类微晶质碳素材料,是一种常用的吸附剂、催化剂或催化剂载体.活性炭按原料来源可分为:木质活性炭、果壳活性炭、兽骨/血活性炭、矿物原料活性炭、合成树脂活性炭、橡胶/塑料活性炭、再生活性炭等;活性炭按外观形态可分为:粉状、颗粒状、不规则颗粒状、圆柱形、球形和纤维状等.
活性炭是什么意思
活性炭是什么意思?
活性炭是一种经特殊处理的炭,将有机原料(果壳、煤、木材等)在隔绝空气的条件下加热,以减少非碳成分(此过程称为炭化),然后与气体反应,表面被侵蚀,产生微孔发达的结构 (此过程称为活化)。
由于活化的过程是一个微观过程,及大量的分子碳化物表面侵蚀是点状侵蚀 ,所以造成了活性炭表面具有无数细小孔隙。
活性炭表面的微孔直径大多在2~50nm之间,即使是少量的活性炭,也有巨大的表面积,每克活性炭的表面积为500~1500m2,活性炭的一切应用,几乎都基于活性炭的这一特点。
通常为粉状或粒状具有很强吸附能力的多孔无定形炭。
由固态碳质物(如煤、木料、硬果壳、果核、树脂等)在隔绝空气条件下经600~900℃高温炭化,然后在400~900℃条件下用空气、二氧化碳、水蒸气或三者的混合气体进行氧化活化后获得。
我们可以利用一些具有气味吸附功能的东西来改善室内空气质量。目前用的最多的就是活性炭。每平方米放置50g左右的活性炭能对甲醛起到很好的吸附作用,但同时也要注意活性炭的更换,一般以7至8个月一次为宜。
巴藻土是现在除甲醛一种经济适用的 *** ,它的特点是物理吸附,100g的巴藻土就可以治理1.5平米空间的甲醛以及有害物质,而且开窗通风能加快甲醛与巴藻土的接触面积,它吸收甲醛的速度也会大大的增加。
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