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Tang, Qinghui; Chen, Yingquan; Yang, Haiping; Liu, Ming; Xiao, Haoyu; Wang, Shurong; Chen, Hanping; Raza Naqvi, Salman
Bioresource technology, November 2021, 2021-11-00, 20211101, Letnik: 339Journal Article
Display omitted •RF, SVM were applied and compared to predict pyrolytic gas yield and compositions.•Feature reduction was applied to improve performances (R2 > 0.85, RMSE < 5.7%).•The importance of features for different targets was identified.•Partial dependence analysis provided new insights for pyrolysis process. This study aimed to utilize machine learning algorithems combined with feature reduction for predicting pyrolytic gas yield and compositions based on pyrolysis conditions and biomass characteristics. To this end, random forest (RF) and support vector machine (SVM) was introduced and compared. The results suggested that six features were adequate to accurately forecast (R2 > 0.85, RMSE < 5.7%) the yield while the compositions only required three. Moreover, the profound information behind the models was extracted. The relative contribution of pyrolysis conditions was higher than that of biomass characteristics for yield (55%), CO2 (73%), and H2 (81%), which was inverse for CO (12%) and CH4 (38%). Furthermore, partial dependence analysis quantified the effects of both reduced features and their interactions exerted on pyrolysis process. This study provided references for pyrolytic gas production and upgrading in a more convenient manner with fewer features and extended the knowledge into the biomass pyrolysis process.
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