功能材料
功能材料
공능재료
Journal of Functional Materials
2015年
18期
18061-18064
,共4页
杨华%黄丽%刘石彩%赵佳萍%侯敏%许伟
楊華%黃麗%劉石綵%趙佳萍%侯敏%許偉
양화%황려%류석채%조가평%후민%허위
油茶壳%活性炭%灰分%盐酸洗涤%孔结构
油茶殼%活性炭%灰分%鹽痠洗滌%孔結構
유다각%활성탄%회분%염산세조%공결구
camellia oleifera shell%activated carbon%ash content%hydrochloric acid washing%pore structure
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>2h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。
以油茶殼為原料,採用鹽痠洗滌的方法,探究瞭茶殼炭的灰分去除工藝及機理。研究髮現,炭化溫度越高,炭樣灰分越高;痠洗時間越長,炭樣灰分越低;噹痠洗時間>2h之後,再延長痠洗時間,灰分降低不明顯。油茶殼炭採用鹽痠洗滌除灰工藝時,脫灰反應主要髮生在炭的錶麵,不會形成有效的擴孔反應。在實驗研究炭化溫度範圍內,油茶殼炭的孔隙結構均很不髮達,鹽痠洗滌能顯著降低其灰分,但幾乎不形成新的孔隙結構。油茶殼炭經水蒸汽活化擴孔後,鹽痠洗滌在降低灰分的同時,通過清除堵塞孔道的無機物質,可以增加約20%的孔容,但孔的大小沒有髮生變化。
이유다각위원료,채용염산세조적방법,탐구료다각탄적회분거제공예급궤리。연구발현,탄화온도월고,탄양회분월고;산세시간월장,탄양회분월저;당산세시간>2h지후,재연장산세시간,회분강저불명현。유다각탄채용염산세조제회공예시,탈회반응주요발생재탄적표면,불회형성유효적확공반응。재실험연구탄화온도범위내,유다각탄적공극결구균흔불발체,염산세조능현저강저기회분,단궤호불형성신적공극결구。유다각탄경수증기활화확공후,염산세조재강저회분적동시,통과청제도새공도적무궤물질,가이증가약20%적공용,단공적대소몰유발생변화。
Using camellia oleifera shell as raw material,technology and mechanism of removing ash from camel-lia 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 re-moving ash from camellia oleifera shell charcoal using hydrochloric acid washing,de-ashing reaction mainly oc-curred 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 oleif-era 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.