Potential of Biochar Derived from Agricultural Residues for Sustainable Management
Potential of Biochar Derived from Agricultural Residues for Sustainable Management
复制标题
DOI：
10.3390/su13158147
复制
发表时间：
2021-07
期刊：
影响因子：
3.9
通讯作者：
Sasiwimol Khawkomol;Rattikan Neamchan;Thunchanok Thongsamer;S. Vinitnantharat;Boonma Panpradit;P. Sohsalam-P.
中科院分区：
文献类型：
--
作者：
Sasiwimol Khawkomol;Rattikan Neamchan;Thunchanok Thongsamer;S. Vinitnantharat;Boonma Panpradit;P. Sohsalam-P.
卧式滚筒窑是东南亚国家广泛使用的生产生物炭的传统方法。了解窑内温度条件及其对生物炭性能的影响对于确定合适的生物炭应用至关重要。本研究以四种农业废弃物（玉米芯、椰壳、椰壳、稻草）为原料，利用转筒窑生产生物质炭。农业剩余物在100-200 min内转化为生物炭，这取决于它们的结构。采用工业分析、元素分析和元素分析方法对生物炭作为生物质燃料的适宜性进行了分析。通过堆积密度、碘值、pHpzc、SEM和FTIR等测试手段对生物炭的物理和化学性质进行了表征。所有的生物炭具有低的O/C和H/C比和来自羰基和羟基的负电荷。椰壳和椰壳生物炭具有较高的热值和较高的表面官能团，可以与土壤中的养分相互作用。因此，这些生物炭适用于各种目的，包括作为生物燃料、吸附剂和土壤改良剂。
A horizontal drum kiln is a traditional method widely used in Southeast Asian countries for producing biochar. An understanding of temperature conditions in the kiln and its influence on biochar properties is crucial for identifying suitable biochar applications. In this study, four agricultural residues (corncob, coconut husk, coconut shell, and rice straw) were used for drum kiln biochar production. The agricultural residues were turned into biochar within 100–200 min, depending on their structures. The suitability of biochar for briquette fuels was analyzed using proximate, ultimate, and elemental analysis. The biochar’s physical and chemical properties were characterized via bulk density, iodine number, pHpzc, SEM, and FTIR measurements. All biochars had low O/C and H/C ratios and negative charge from both carbonyl and hydroxyl groups. Coconut husk and shell biochar had desirable properties such as high heating value and a high amount of surface functional groups which can interact with nutrients in soil. These biochars are thus suitable for use for a variety of purposes including as biofuels, adsorbents, and as soil amendments.