On-line analysis of the correlation between gasification characteristics and microstructure of woody biowaste after hydrothermal carbonization. (December 2021)

• Record Type: Journal Article
• Authors: Zeng, Mingxun; Ge, Zefeng; Ma, Yuna; Zha, Zhenting; Zhang, Huiyan
• Is Part Of: Bioresource technology. Volume 342(2021)
• Publication Date: 2021-12
• Subjects: Solid waste -- Biomass -- Hydrothermal pretreatment -- Gasification efficiency -- Carbon and pore structure; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.126009
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The hydrothermal carbonization process was used to pretreat woody biowaste. On-line syngas analysis was applied to investigate gasification characteristics. Cold gas efficiency of hydrochar was 93.57 % compared with 76.65 % of raw material. A good correlation was built between hydrochar crystallinity and syngas quality. Abstract: Woody biowaste is a component which is difficult to be converted among multiple solid waste (MSW) during the hydrothermal carbonization (HTC). In this paper, poplar sawdust was pretreated by HTC to study the correlation between microstructure and gasification characteristics. The results showed the fixed carbon and higher calorific value increased from 13.44 % and 19.41 MJ/kg to 41.47 % and 25.85 MJ/kg after HTC, respectively. The cold gas efficiency of hydrochars prepared at 220 °C was the highest of 93.57 % compared with that of raw material of 76.65 %. It was found that carbon structure had a greater influence on hydrochars gasification characteristics than pore structure. The crystallinity of hydrochars had a good correlation with the total yield and H2 /CO of syngas, which can provide guidance for HTC pretreatment of woody biowaste and MSW.