Department of Energy, Tezpur University, Tezpur 784028, Assam, India.
Department of Environmental Science, Tezpur University, Tezpur 784028, Assam, India.
Bioresour Technol. 2017 Oct;242:324-328. doi: 10.1016/j.biortech.2017.04.050. Epub 2017 Apr 16.
This study investigated the yields and the physicochemical properties of biochar from three different feedstocks viz., i) bioenergy byproducts (deoiled cakes of Jatropha carcus and Pongamia glabra), ii) lignocellulose biomass (Jatropha carcus seed cover), and iii) a noxious weed (Parthenium hysterophorus), obtained through slow pyrolysis at a heating rate of 40°Cmin with a nitrogen flow 100mlmin at a temperature range of 350-650°C. For successful utilization of biochar for C-sequestration, its ability to resist abiotic or biotic degradation was deduced from recalcitrance index R by using TG analysis. It was observed that the biochar produced at higher temperature had higher water holding capacity (WHC) and pH, suggesting its suitability as an amendment in soil with low water retention capacity; thus biochar may be designed to selectively improve soil chemical and physical properties by altering feedstocks and pyrolysis conditions. Biochar produced at 650°C had highest yield in the range of 28.52-39.9 wt.%.
本研究探讨了三种不同原料（生物能源副产物（麻疯树和印楝的脱油饼）、ii）木质纤维素生物质（麻疯树种子壳）和 iii）一种恶性杂草（胜红蓟））通过慢速热解在加热速率为 40°Cmin 下获得的生物炭的产率和物理化学性质，氮气流量为 100mlmin，温度范围为 350-650°C。为了成功地将生物炭用于碳封存，通过 TG 分析，根据抗降解指数 R 推断出生物炭抵抗非生物或生物降解的能力。结果表明，在较高温度下生产的生物炭具有更高的持水能力（WHC）和 pH 值，表明其适合用作保水能力低的土壤改良剂；因此，生物炭可以通过改变原料和热解条件来有选择地改善土壤的化学和物理性质。在 650°C 下生产的生物炭的产率在 28.52-39.9wt.%范围内最高。
