Properties and potential use of biochars from residues of two rice varieties, Japanese Koshihikari and Vietnamese IR50404
Properties and potential use of biochars from residues of two rice varieties, Japanese Koshihikari and Vietnamese IR50404
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DOI：
10.1007/s10163-018-0768-8
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发表时间：
2019
影响因子：
3.1
通讯作者：
P. Do;T. Ueda;R. Kose;L. Nguyen;T. Okayama;T. Miyanishi
中科院分区：
文献类型：
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作者：
P. Do;T. Ueda;R. Kose;L. Nguyen;T. Okayama;T. Miyanishi
将稻草或稻壳转化为生物炭是回收利用它们的最有效方法之一。研究了水稻品种和热解温度对日本典型稻草品种Koshihikari和越南典型水稻品种 50404的稻草和稻壳生物炭性能的影响。与低温生物炭相比，高温热解生物炭(>；IR50404)具有更高的比表面积(约3倍)和更高的硅含量(超过15%)，但H/C和O/C比较低。就水稻品种而言，日本产的Koshihikarichars比越南的IR50404米渣具有更高的硅含量(近20%)，但比表面积和O/C、H/C比低。在600℃和700℃下，越南稻草生物炭的比表面积比日本稻草生物炭大~ 30%，而越南稻壳生物炭的比表面积略大于日本稻壳生物炭。日本Koshihikari型生物炭中硅含量较高是其比表面积较小的主要原因之一，这是因为二氧化硅填充或堵塞孔的可能性较高。
Converting rice straw or rice husk into biochars is one of the most effective ways to reuse them. This study examined the effect of rice variety and pyrolysis temperature on the properties of biochars, produced from rice straw and rice husk ofKoshihikari(a typical rice variety of Japan) andIR50404(a typical rice variety of Vietnam), in the temperature range from 300 to 800 °C. Biochars produced at high pyrolysis temperatures (> 500 °C) showed higher surface area (approximately 3 times) and higher Si content (by more than 15%), but lower H/C and O/C ratios in comparison with biochars produced at lower temperature. With regard to rice variety, JapaneseKoshihikaribiochars possessed higher Si content (almost 20%), but lower specific surface area and O/C and H/C ratios than VietnameseIR50404rice residue biochars. The surface area of Vietnamese-rice-straw biochars at 600 and 700 °C was ~ 30% more than Japanese-rice-straw biochars, while the surface area of Vietnamese-rice-husk biochars was slightly more than that of Japanese-rice-husk biochars. Higher Si content in JapaneseKoshihikaribiochars was predicted as one of the main reasons for the lower surface area in their biochars, due to the higher possibility of pore-filling or blocking by silica.