茶壳炭材料除灰工艺及机理研究  

Investigation of technology and mechanism of removing ash from camellia oleifera shell charcoal material

作　　者：杨华[1,2,3,4] 黄丽[1,2,3,4] 刘石彩[1,2,3,4] 赵佳萍 侯敏[1,2,3,4] 许伟[1,2,3,4] 

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开发实验室 [4]江苏省生物质能源与材料重点实验室,南京210042

出　　处：《功能材料》2015年第18期18061-18064,共4页Journal of Functional Materials

基　　金：国家科技支撑计划资助项目(2012BAD30B03)

摘　　要：以油茶壳为原料,采用盐酸洗涤的方法,探究了茶壳炭的灰分去除工艺及机理。研究发现,炭化温度越高,炭样灰分越高;酸洗时间越长,炭样灰分越低;当酸洗时间>2 h之后,再延长酸洗时间,灰分降低不明显。油茶壳炭采用盐酸洗涤除灰工艺时,脱灰反应主要发生在炭的表面,不会形成有效的扩孔反应。在实验研究炭化温度范围内,油茶壳炭的孔隙结构均很不发达,盐酸洗涤能显著降低其灰分,但几乎不形成新的孔隙结构。油茶壳炭经水蒸汽活化扩孔后,盐酸洗涤在降低灰分的同时,通过清除堵塞孔道的无机物质,可以增加约20%的孔容,但孔的大小没有发生变化。Using camellia oleifera shell as raw material,technology and mechanism of removing ash from camellia oleifera shell charcoal were explored by the method of hydrochloric acid washing. The results showed that the ash content gradually increased with an increase in carbonized temperature and a decrease in acid washing time,however,after acid washing for more than 2 h,ash content was not significantly changed. In the process of removing ash from camellia oleifera shell charcoal using hydrochloric acid washing,de-ashing reaction mainly occurred on the surface of charcoal and effective pore expanding was not be formed. Pore structure of all charcoal was not well-developed in the experiment range of carbonization temperature,hydrochloric acid washing could significantly reduce the ash content but hardly benefit the formation of new pore structure. After camellia oleifera shell charcoal were activated by steam,acid washing could decrease ash content and also increase about 20% pore volume without changing the pole size by removing inorganic substances blocking porous channel。

关 键 词：油茶壳 活性炭 灰分 盐酸洗涤 孔结构 

分 类 号：TQ424.1[化学工程]