Azargohar R, Dalai A K
Catalysis and Chemical Reaction Engineering Laboratories, Department of Chemical Engineering, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C5.
Appl Biochem Biotechnol. 2006 Spring;129-132:762-73.
Biochar was evaluated as a precursor of activated carbon. This product was produced by chemical activation using potassium hydroxide. The effects of operating conditions of activation process, such as temperature, activating agent to biochar mass ratio, and nitrogen flow rate, on the textural and chemical properties of the product were investigated. Activated carbon produced by this method has internal surface area at least 50 times than that of the precursor and is highly microporous, which is also confirmed by scanning electron microscopy analysis. Fourier-transform infrared spectroscopy analysis showed development of aromatization in the structure of activated carbon. X-ray diffraction data indicated the formation of small, two-dimensional graphite-like structure at high temperatures. Thermogravimetric study showed that when potassium hydroxide to biochar mass ratio was more than one, the weight loss decreased.
生物炭被评估为活性炭的前驱体。该产品通过使用氢氧化钾进行化学活化制备。研究了活化过程操作条件，如温度、活化剂与生物炭质量比和氮气流速，对产品结构和化学性质的影响。通过该方法制备的活性炭具有至少比前驱体大50倍的内表面积，且具有高度微孔结构，扫描电子显微镜分析也证实了这一点。傅里叶变换红外光谱分析表明活性炭结构中芳构化程度增加。X射线衍射数据表明在高温下形成了小的二维类石墨结构。热重研究表明，当氢氧化钾与生物炭质量比大于1时，失重减少。
