ICAR Research Complex for NEH Region, Sikkim Centre, Gangtok, Sikkim 737102, India; Palli Siksha Bhavana, Visva Bharati, Sriniketan, Birbhum, India.
Palli Siksha Bhavana, Visva Bharati, Sriniketan, Birbhum, India.
J Hazard Mater. 2021 Apr 5;407:124370. doi: 10.1016/j.jhazmat.2020.124370. Epub 2020 Oct 26.
It has been quantified the influence of four feedstocks and three pyrolysis temperature on twenty nine morpho-mineralogical characteristics of biochar for their wide range of environmental and soil application. The morpho-mineralogical characteristics were principally manipulated by feedstocks rather than pyrolysis temperature. With increase in pyrolysis temperature the average decrease in biochar mass yield was 20.69%. With increase in pyrolysis temperature the higher heating value of all the four biochar decreased. The X-ray diffraction band patterns of biochar were of an amorphous with crystalline structure and represented significant quartz content. The crystallinity index deceased (average 8.98%) in all biochar with increase in pyrolysis temperature. The presence of crystalline stripes on black dots in transmission electron microscopy proved that the nano-range like sheets was arranged in a tubostratic state. The biochar scanning electron microscopy images showed cross-linked porus structure with layer construction. Low temperature pyrolyzed biochar showed little acid soluble nutrients than high temperature. The existence of more water soluble minerals indicated its potential to act as a source of available plant nutrients. The energy density and energy yield of biochar were linearly and fuel ratio was inversely correlated with pyrolysis temperature.
已经量化了四种原料和三种热解温度对生物炭的 29 种形态矿物特性的影响，因为这些特性在广泛的环境和土壤应用中具有重要意义。形态矿物特性主要受原料影响，而不是热解温度。随着热解温度的升高，生物炭质量产率的平均下降幅度为 20.69%。随着热解温度的升高，四种生物炭的高位热值均降低。生物炭的 X 射线衍射带图案为无定形和结晶结构，并代表了大量石英含量。随着热解温度的升高，所有生物炭的结晶度指数均下降（平均 8.98%）。透射电子显微镜中黑色斑点上的结晶条纹证明纳米级薄片以管状层状排列。生物炭的扫描电子显微镜图像显示交联的多孔结构和层状结构。低温热解生物炭的酸溶性养分比高温热解生物炭少。存在更多的水溶性矿物质表明其有潜力作为可用植物养分的来源。生物炭的能量密度和能量产率与热解温度呈线性相关，而燃料比则呈反比。
