Lignin is produced abundantly in wood pulping. Because it is currently mainly used for the generation of process energy and electrical energy by combustion, its isolation from processing liquor and subsequent purification for potential higher value uses is challenging. Therefore, the present study evaluates the feasibility of direct carbonization of spray-dried processing liquor from two relevant industrial pulping processes with the aim of obtaining electrically conducting carbon. Analysis of the carbonization process reveals significant differences in the thermal stability of spray-dried liquor from a sulfite pulping process compared to kraft liquor. As a result, kraft-derived carbon shows highly ordered graphitic structure and good electrical conductivity comparable to carbon black, whereas sulfite liquor derived carbon only shows modest conductivity.

中文翻译：

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废木浆液直接碳化制得的导电碳微粒

木质素在木浆中大量生产。由于它目前主要用于通过燃烧产生过程能量和电能，因此将其与加工液分离并随后进行提纯以实现潜在的更高价值的用途具有挑战性。因此，本研究评估了从两个相关的工业制浆工艺中直接喷雾干燥处理液的碳化的可行性，目的是获得导电碳。碳化过程的分析表明，与硫酸盐浆相比，亚硫酸盐制浆过程中喷雾干燥液的热稳定性存在显着差异。结果，与牛皮黑相比，牛皮纸衍生的碳显示出高度有序的石墨结构和良好的导电性，