Environmental and socioeconomic concerns impact the dependence on coal, resulting in increased thermochemical coconversion of coal and biomass. The efficiency of the thermochemical conversion process is controlled by the conversion of char. In this paper, the properties of copyrolysis char from coal blended with biomass are focused on, through a review of the literature. The properties of copyrolysis char can be influenced by the interaction between coal and biomass during the copyrolysis process. More than 80% of the research has reported that copyrolysis has synergistic effects on the surface morphology and reactivity of copyrolysis char. Possible synergies due to the differences in the structure and chemical composition of coal and biomass are discussed with some possible synergistic mechanisms. Recommendations grounded on research in the literature are suggested.

中文翻译：

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煤与生物质混合制自分解炭的性质研究进展

环境和社会经济问题影响了对煤炭的依赖，导致煤炭和生物质的热化学共转化增加。热化学转化过程的效率由焦炭的转化控制。本文通过文献综述，着重研究了煤与生物质混合制煤的共分解炭的性质。在煤分解过程中，煤与生物质之间的相互作用会影响煤分解炭的特性。超过80％的研究报告称，共分解对共分解炭的表面形态和反应性具有协同作用。讨论了由于煤和生物质的结构和化学组成不同而可能产生的协同作用，并提出了一些可能的协同作用机理。