Hydrothermal carbonization of combined sodium citrate-thermal pretreated sewage sludge for the production of low-nitrogen clean solid fuels

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-01-28 DOI:10.1016/j.jaap.2025.106987

Yue Wang , Le Gou , Liyi Dai , Yuanyuan Wang

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引用次数: 0

Abstract

The high nitrogen content of hydrochar produced from the hydrothermal carbonization (HTC) of sewage sludge (SS) leads to significant NO_x emissions when used as a solid fuel. To reduce the nitrogen content in hydrochar, extracellular polymeric substances (EPS) and cellular structures that hinder nitrogen migration during HTC of SS must be disrupted. Sodium citrate-thermal (SC-T) combined pretreatment has been shown to effectively break down the EPS and cell structure, resulting in the release and hydrolysis of organic matter. Therefore, the combination of SC-T and HTC is a novel strategy to produce low-nitrogen hydrochar. The results showed that SS pretreated under optimal conditions (0.7 g SC/g SS, heated at 121 °C for 2 h) and then treated at 240 °C for 1 h during HTC achieved the lowest nitrogen content (0.94 wt%). This provides a new method to produce low nitrogen and high quality hydrochar for solid fuels.

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来源期刊

Journal of Analytical and Applied Pyrolysis 化学-分析化学

CiteScore

9.10

自引率

11.70%

发文量

340

审稿时长

44 days

期刊介绍： The Journal of Analytical and Applied Pyrolysis (JAAP) is devoted to the publication of papers dealing with innovative applications of pyrolysis processes, the characterization of products related to pyrolysis reactions, and investigations of reaction mechanism. To be considered by JAAP, a manuscript should present significant progress in these topics. The novelty must be satisfactorily argued in the cover letter. A manuscript with a cover letter to the editor not addressing the novelty is likely to be rejected without review.