A parametric study of particle size influence on sewage sludge-derived hydrochar and coal char co-gasification: Reactivity and carbon conversion analysis

被引:0
作者
Laghari, Azhar Ali [1 ]
Leghari, Asma [2 ]
Kumar, Akash [3 ]
Kumari, Lata [4 ]
Rizwan, Muhammad [5 ]
Abro, Qurat-ul-ain [6 ]
Ali, Memon Kashif [7 ]
Shen, Yongheng [1 ]
Guo, Qingxia [1 ]
机构
[1] Shanxi Agr Univ, Coll Resources & Environm, Jinzhong 030801, Shanxi, Peoples R China
[2] East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China
[3] Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China
[4] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China
[5] East China Univ Sci & Technol, Int Joint Res Ctr Green Energy & Chem Ind, Shanghai 200237, Peoples R China
[6] Univ Int Business & Econ, Business Sch, Beijing 100029, Peoples R China
[7] Shandong Univ Sci & Technol, Sch Biol & Chem Engn, Qingdao 266590, Shandong, Peoples R China
关键词
Pyrolyzed hydrochar; Sewage sludge; Gasification; Reactivity; Coal char; STEAM GASIFICATION; REACTION-KINETICS; PORE DIFFUSION; MASS-TRANSFER; BIOMASS; TEMPERATURE; MECHANISM; PYROLYSIS; CATALYSTS; SYNERGY;
D O I
10.1016/j.biombioe.2025.107715
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Sewage sludge (SS) poses significant environmental and socio-economic challenges due to its high moisture content and limited disposal options. Hydrothermal carbonization (HTC) has been identified as an effective pretreatment method to enhance the stability and reactivity of hydrochar (HC) for energy applications. This study investigates the co-gasification behavior of pyrolyzed HC derived from SS and coal char in CO2 environments, with a focus on the influence of temperature (850 degrees C, 900 degrees C, and 950 degrees C) and particle size (35 mu m, 110 mu m, 250 mu m, and 430 mu m) on gasification reactivity and carbon conversion. Experimental results show that smaller particles (35 mu m) exhibited the highest reactivity due to their larger surface area-to-volume ratio, achieving a gasification rate of 0.010945 s-1 at 950 degrees C. Increasing the temperature significantly enhanced carbon conversion, with conversion rates accelerating particularly at 950 degrees C during the initial phases. Coal char demonstrated rapid thermal degradation, while HC displayed superior thermal stability and reduced reactivity at higher temperatures due to its more condensed carbon structure. Notably, HC concentrations (15 %) improved overall reactivity compared to lower concentrations (5 %), emphasizing the synergistic effects of co-gasification. This study highlights the critical role of temperature and particle size in optimizing waste-to-energy conversion processes, offering actionable insights for enhancing efficiency and sustainability in waste management systems.
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页数:12
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