Int J Phytoremediation. 2014;16(7-12):684-93. doi: 10.1080/15226514.2013.856842.
The biochar is an important carbon-rich product that is generated from biomass sources through pyrolysis. Biochar (charcoal) can be both used directly as a potential source of solid biofuels and as soil amendments for barren lands. The aim of this study was investigate influence of pyrolysis temperature on the physicochemical properties and structure of biochar. The biochars were produced by pyrolysis of rapeseed (Brassica napus L.) using a fixed-bed reactor at different pyrolysis temperatures (400-700 degrees C). The produced biochars were characterized by proximate and elemental analysis, Brunauer-Emmett-Teller (BET) surface area, particle size distributions, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy. The results showed that both chemical and surface properties of the biochars were significantly affected by the pyrolysis temperature. Aromatic hydrocarbons, hydroxyl and carbonyl compounds were the majority components of the biochar. The biochar obtained at 700 degrees C had a high fixed carbon content (66.16%) as well as a high heating value, and therefore it could be used as solid fuel, precursor in the activated carbons manufacture (specific surface area until 25.38 m(2) g(-1)), or to obtain category-A briquettes.
生物炭是一种重要的富碳产物，可通过热解从生物质源中产生。生物炭（木炭）既可以直接用作固体生物燃料的潜在来源，也可以用作贫瘠土地的土壤改良剂。本研究旨在探讨热解温度对生物炭的物理化学性质和结构的影响。使用固定床反应器，在不同的热解温度（400-700°C）下，通过油菜籽（甘蓝型油菜）的热解制备生物炭。通过工业分析、元素分析、BET 比表面积、粒度分布、扫描电子显微镜（SEM）、傅里叶变换红外（FTIR）光谱对制备的生物炭进行了表征。结果表明，热解温度显著影响生物炭的化学和表面性质。芳烃、羟基和羰基化合物是生物炭的主要成分。在 700°C 下获得的生物炭具有较高的固定碳含量（66.16%）和高热值，因此可用作固体燃料、活性炭制造的前体（比表面积高达 25.38 m²/g），或用于生产 A 级型煤。
