Abstract: The low-temperature co-pyrolysis experiments of Australia lignite(AL) blending different proportions of ulva are undertaken. The results show that the amount of pyrolysis oil decreases after a prior increase with the increase of ulva blending ratio, indicating an inhibition effect after first promotion compared with calculated values. When the blending ratio is 30%, the yield of pyrolysis oil rises to 12.5%, an increase of 26.01% to that with pure lignite and reaches the most-positive deviation to the theoretical values. The alkane in co-pyrolysis oil increases by 34.46% in comparison to that with the pure lignite through GC-MS measurements, which improves the quality of pyrolysis oil. Co-pyrolysis chars exhibit depth cracks, improved reactivity and adsorption by the SEM analysis. Co-pyrolysis chars therefore have a wider range of industrial applications.

Key words: ulva, lignite, pyrolysis oil, synergetic effect, upgrading

摘要： 将褐煤添加不等量的石莼进行低温共热解实验,实验表明,随石莼添加量的增加,热解油出现先增加后减少的趋势,与质量加权值相比,出现先促进后抑制的相互作用,当石莼添加30%时热解油产率最高,为12.5%,比纯褐煤时提高了26.01%,与质量加权值的正偏差最大。选取纯褐煤和30%石莼添加量的热解油进行GC-MS检测,共热解油烷烃类含量比纯褐煤增加了34.46%,实现了热解油较大程度的轻质化,两组样的半焦的SEM对比分析,共热解半焦出现了深度龟裂纹,半焦的反应性、吸附性提高,共热解半焦具有更广泛的工业用途。

关键词: 石莼, 褐煤, 热解油, 协同作用, 轻质化