Prior information on the pyrolysis product behaviour of biomass components-cellulose, hemicellulose and lignin is critical in the selection of feedstock as components have a significant influence on the pyrolysis products yield. In this study, the effect of biomass components on the yield of slow pyrolysis products (char, bio-oil and syngas) is investigated using a validated ASPEN Plus® model. The model is simulated at a temperature of 450 °C, a heating rate of 10 °C/min and a solid residence time of 30 min. The results indicated that at the given conditions, lignin contributed 2.4 and 2.5 times more char yield than cellulose and hemicellulose. The hemicellulose contributed 1.33 times more syngas yield than lignin while the cellulose and hemicellulose contributed 8.67 times more bio-oil yield than lignin. Moreover, the cost involved in the production of char using lignin (110 $/ton) is significantly economical than using cellulose (285 $/ton) and hemicellulose (296 $/ton). The net CO₂ emission of lignin pyrolysis is 4.14 times lower than cellulose pyrolysis and 3.94 times lower than hemicellulose pyrolysis. It can be concluded that lignin pyrolysis is more advantageous than cellulose and hemicellulose pyrolysis. In the selection of feedstock for the slow pyrolysis, the feedstock with more lignin content is preferred.

Graphical abstract

中文翻译：

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使用Aspen Plus进行慢速热解产物产量中生物质成分的技术经济分析

关于生物质组分-纤维素，半纤维素和木质素的热解产物行为的先前信息在原料选择中是关键的，因为组分对热解产物的产率具有显着影响。在这项研究中，使用经过验证的ASPENPlus®模型研究了生物质组分对慢速热解产物（焦炭，生物油和合成气）产量的影响。该模型在450°C的温度，10°C / min的加热速率和30分钟的固体停留时间下进行仿真。结果表明，在给定条件下，木质素的焦炭收率比纤维素和半纤维素高2.4到2.5倍。半纤维素的合成气产率比木质素高1.33倍，而纤维素和半纤维素的生物油产率比木质素高8.67倍。此外，与使用纤维素（285美元/吨）和半纤维素（296美元/吨）相比，使用木质素（110美元/吨）生产炭的成本要经济得多。净CO₂木质素热解的排放量比纤维素热解低4.14倍，比半纤维素热解低3.94倍。可以得出结论，木质素热解比纤维素和半纤维素热解更有利。在选择用于缓慢热解的原料中，具有更多木质素含量的原料是优选的。

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