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。
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.
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