生物质三组分二元混合热解特性研究

采用TG-FTIR-MS研究了生物质三组分二元混合热解过程的失重特性和小分子气体逸出规律。结果表明二元混合组分热解过程降低了热解反应开始温度。纤维素与半纤维素混合热解过程热解反应受到抑制，热解失重率降低，H₂、CH₄和H₂O产量减小，CO和CO₂产量增加。木质素和半纤维素在混合热解过程中存在协同效应，促进热解反应进行，H₂产量增加，然而其他小分子气体产物的生成被抑制，协同效应的效果更有利于可冷凝挥发分产物生成，这种效应随着半纤维素比例增大而减弱。半纤维素和纤维素在整个热解过程表现出相互抑制的效果，其小分子气体产物产量减小，但随着纤维素比例增大，影响减弱。

Study on the pyrolysis characteristics of binary mixture of biomass three-component

TG-FTIR-MS was used to study the mass loss characteristics and the evolution of small molecule gas during the pyrolysis of binary mixtures, which were mixed by biomass three-component. The results showed that the initial pyrolysis temperature decreased in the co-pyrolysis process. During the co-pyrolysis of cellulose and hemicellulose, the pyrolysis reaction was inhibited and the mass loss rate was reduced. Additionally, the yield of H₂, CH₄ and H₂O decreased, while the yield of CO and CO₂ increased. Synergistic effect was found in the co-pyrolysis of lignin and hemicellulose, which promoted the pyrolysis reaction process. For the volatile products, the formation of H₂O was promoted and its yield increased, however, the production of other small molecule gas products was inhibited. This synergistic effect was mainly conducive to the formation of condensable volatile products. Moreover, this effect decreased as the proportion of hemicellulose increased. The entire pyrolysis process of hemicellulose and cellulose exhibited mutual inhibition effects, and the production of small molecule gas products decreased, but the influence decreased with the increase of cellulose ratio.