A Review Study on Precipitated Silica and Activated Carbon from Rice Husk
A Review Study on Precipitated Silica and Activated Carbon from Rice Husk
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稻壳沉淀二氧化硅和活性炭研究进展
DOI：
10.4172/2157-7048.1000156
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Bhattacherjee
中科院分区：
文献类型：
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作者：
R. Ghosh;S. Bhattacherjee
本文以稻壳为原料，研究了稻壳法制备二氧化硅和活性炭的最佳工艺条件。通过预处理或酸洗、酸洗稻壳的碳化温度、氢氧化钠等活化剂、碳化时间、与活化剂一起加热的时间等各种参数进行二氧化硅的沉淀。以稻壳灰为原料，在不同活化剂（氢氧化钠）浓度和不同活化温度下制备活性炭。这些研究表明，纳米二氧化硅粉末可以通过优化的参数在研究中使用。如果没有优化，人们将得到具有不同产率的不同等级的二氧化硅。同样，通过改变活化剂参数、活化后炭化温度和炭化时间，可以得到不同等级的活性炭。介绍了一种以稻壳为原料，沿着配以废水处理级活性炭制备纳米二氧化硅粉体的工艺。
The present work entitled “Precipitated Silica and Activated Carbon from Rice Husk” was taken up to study the optimum operating conditions at laboratory scale. Precipitation of Silica was carried out using various parameters such as pre-treatment or acid washing, carbonization temperature of acid washed rice husk, activating agent such as sodium hydroxide, time of carbonization, time of heating with activating agent. The activated carbon was obtained from rice husk ash at various concentration of activating agent (Sodium Hydroxide) and different activation temperature. These studies indicate that nano-silica powder can be produced by optimizing the parameters used in the study. Without optimization, one would get different grades of silica with different yields. Similarly, different grades of activated carbon can be obtained by varying the parameters of activating agent, carbonizing temperature after activation and time of carbonization. The article presents a procedure to produce nano-silica powder from rice husk along with wastewater treatment grade of activated carbon.