• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bioenergy research >Production Factors Controlling the Physical Characteristics of Biochar Derived from Phytoremediation Willow for Agricultural Applications
【24h】

Production Factors Controlling the Physical Characteristics of Biochar Derived from Phytoremediation Willow for Agricultural Applications

机译：控制用于植物的植物修复柳树生物炭的物理特性的生产要素

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Willow, a leading bioenergy feedstock, may be planted for bioremediation and has been used, more recently, as the biomass feedstock in the manufacture of biochar for agricultural applications. Here, we present a detailed study of the physical and chemical factors affecting willow char properties, where the feedstock is a by-product of bioremediation, potentially transferring pollutants such as heavy metals to the wood feed. Biochar samples were produced via pyrolysis of short-rotation coppice willow, grown on contaminated land, using several treatment times at heat treatment temperatures (HTTs) in the range 350–650 °C, under a constant flow of argon, set at either 100 or 500 mL min−1. The samples were analysed for yield, elemental analysis and structural characteristics, including surface area and pore size distribution, surface functionality and metal content. All chars obtained have high fixed carbon contents but vary in surface characteristics with a marked increase in basic character with increasing HTT, ascribed to the removal of surface oxygen moieties. Results indicate a minimum pyrolysis temperature of 450 °C is required to produce a defined mesoporous structure, as required to facilitate oxygen transport, HTT ≥ 550 °C produces total surface area of >170 m2 g−1 and, more importantly, an appreciable external surface area suitable for microbial colonisation. The data show that selection and optimisation of char properties is possible; however, the interplay of factors may mean some compromise is required.
机译：作为主要的生物能源原料，柳树可能会被种植用于生物修复，并且最近已被用作制造农业用生物炭的生物质原料。在这里，我们对影响柳炭特性的物理和化学因素进行了详细研究，其中原料是生物修复的副产品，有可能将污染物如重金属转移到木材饲料中。生物炭样品是通过短程旋转的矮矮柳柳热解产生的，生长在受污染的土地上，在350-650°C的热处理温度（HTT）下，在恒定的氩气流量下，设置为100或100℃，经过多次处理时间500 mLmin-1。分析了样品的收率，元素分析和结构特征，包括表面积和孔径分布，表面功能和金属含量。所获得的所有炭均具有较高的固定碳含量，但表面特性会有所不同，随着HTT的增加，其基本特性会显着提高，这归因于表面氧部分的去除。结果表明，为了产生规定的介孔结构，需要至少450°C的热解温度才能促进氧气传输，HTT≥550°C产生的总表面积大于170 m2 g-1，更重要的是要有明显的外部适用于微生物定植的表面积。数据表明，可以选择和优化char属性。但是，因素的相互作用可能意味着需要做出一些妥协。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号