EFFECT OF POTASSIUM AND SODIUM SALTS ON STEADY SMOLDERING PROPAGATION VELOCITY OF ROD-SHAPED BIOMASS

Li Shuqi; Yu Guangxin; Liu Xuehua; Chen Xin; Zhang Yi; He Fang

doi:10.19912/j.0254-0096.tynxb.2024-1351

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 781-787. DOI: 10.19912/j.0254-0096.tynxb.2024-1351

EFFECT OF POTASSIUM AND SODIUM SALTS ON STEADY SMOLDERING PROPAGATION VELOCITY OF ROD-SHAPED BIOMASS

Li Shuqi, Yu Guangxin, Liu Xuehua, Chen Xin, Zhang Yi, He Fang

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Abstract

To investigate the effects of potassium and sodium on the propagation velocity of biomass smoldering, biomass rods and char rods were made by adding different proportions （0-1.65%） of KCl and NaCl to a mixture of pine-elm powder, smoldering propagation velocity was compared and analyzed. The results show that both KCl and NaCl enhance the smoldering propagation velocity of biomass and char rods. The smoldering velocity of biomass rod increases with the proportion of KCl, reaching a maximum of 1.5 times that of the original biomass rod. The effect of NaCl is more significant, which is 1.8 times of the original velocity at 0.33%-1.65%. For char rods,the enhancement of smoldering velocity by KCl and NaCl both firstly increases and then decreases, and the maximum smoldering velocity is obtained at 0.99% and 0.33% proportions of KCl and NaCl, respectively. The effect results are consistent with the oxygen transfer theory and the Langmuir-Hinshelwood mechanism. The more significant influence of NaCl compared to KCl is attributed to sodium’s smaller relative atomic mass and more reactive properties.

Key words

biomass / combustion / velocity / alkali metals / rod-shaped fuel / smoldering

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Li Shuqi, Yu Guangxin, Liu Xuehua, Chen Xin, Zhang Yi, He Fang. EFFECT OF POTASSIUM AND SODIUM SALTS ON STEADY SMOLDERING PROPAGATION VELOCITY OF ROD-SHAPED BIOMASS[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 781-787 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1351

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