Abstract Biochar can be used in a large number of applications, ranging from heat and power production to soil amendment. The properties of carbonized biomass depend on the feedstock and the process conditions. Selection of suitable conditions to produce a char with the desired properties therefore requires knowledge of dependencies and influencing factors, both quantitatively and qualitatively. This paper reviews and summarizes the results from a large number of experiments on biochar production in order to give a general overview of the properties that can be achieved by feedstock selection and process design. Production processes include both torrefaction as well as slow pyrolysis at high temperatures. The data evaluation has shown that among all process conditions, the treatment temperature has by far the most dominant influence on all properties. Especially the rather narrow temperature range between 200 and 400 °C causes the most significant changes and is therefore very sensible to influences and possibly difficult to control.

中文翻译：

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生物炭的特性

摘要 生物炭可用于大量应用，从热电生产到土壤改良。碳化生物质的特性取决于原料和工艺条件。因此，选择合适的条件来生产具有所需特性的炭需要定量和定性地了解相关性和影响因素。本文回顾并总结了大量生物炭生产实验的结果，以便对可以通过原料选择和工艺设计实现的特性进行总体概述。生产过程包括烘焙以及高温下的缓慢热解。数据评估表明，在所有工艺条件中，迄今为止，处理温度对所有性能的影响最大。尤其是 200 至 400 °C 之间相当窄的温度范围会导致最显着的变化，因此对影响非常敏感，可能难以控制。