OXIDATION CHARACTERISTICS AND KINETICS OF BIOCHAR IN THERMAL ANALYZER BASED ON SURFACE REACTION

Yan Shengtai; Li Shuqi; Xu Pan; He Fang

doi:10.19912/j.0254-0096.tynxb.2022-1118

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (11) : 406-412. DOI: 10.19912/j.0254-0096.tynxb.2022-1118

OXIDATION CHARACTERISTICS AND KINETICS OF BIOCHAR IN THERMAL ANALYZER BASED ON SURFACE REACTION

Yan Shengtai¹, Li Shuqi¹, Xu Pan², He Fang¹

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Abstract

To determine the kinetic characteristics of piled combustion of biomass or bulk char, the oxidation experiments of different biochar including maize stover char, rice husk char, elm bark char and cypress char were conducted in a simultaneous thermal analyzer. In these experiments, crucibles with different cross sectional area （0.21, 0.42 cm²） and samples with different height （full crucible, 1/10 crucible） were used to analyze the mass loss rate. The results show that the mass loss rate is proportional to reaction area and irrelevant to sample size, indicating that the piled combustion of biochar is surface reaction. Thermogravimetric data of cypress char can better reflect kinetic characteristics due to its lowest ash content and diffusion resistance of oxygen, and its oxidation kinetics based on surface reaction are obtained as the frequency factor AS=40.5 m/s and activation energy E=61.5 kJ/mol.

Key words

biomass / surface reactions / kinetics / biochar / thermal analyzer

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Yan Shengtai, Li Shuqi, Xu Pan, He Fang. OXIDATION CHARACTERISTICS AND KINETICS OF BIOCHAR IN THERMAL ANALYZER BASED ON SURFACE REACTION[J]. Acta Energiae Solaris Sinica. 2023, 44(11): 406-412 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1118

References

[1] 马隆龙, 唐志华, 汪丛伟, 等. 生物质能研究现状及未来发展策略[J]. 中国科学院院刊, 2019, 34(4): 434-442.
MA L L, TANG Z H, WANG C W, et al.Research status and future development strategy of biomass energy[J]. Bulletin of Chinese Academy of Sciences, 2019, 34(4): 434-442.
[2] YU S J, SUN J Z, SHI Y F, et al.Nanocellulose from various biomass wastes: its preparation and potential usages towards the high value-added products[J]. Environmental science and ecotechnology, 2021, 5: 100077.
[3] 戴重阳, 田宜水, 胡二峰, 等. 生物质与低阶煤共热解特性研究及其技术进展[J]. 太阳能学报, 2021, 42(12): 326-333.
DAI C Y, TIAN Y S, HU E F, et al.Research on co-pyrolysis characteristics of biomass and low-rank coal and its technical progress[J]. Acta energiae solaris sinica, 2021, 42(12): 326-333.
[4] WYN H K, KONAROVA M, BELTRAMINI J, et al.Self-sustaining smouldering combustion of waste: a review on applications, key parameters and potential resource recovery[J]. Fuel process technology, 2020, 205: 106425.
[5] NIU Y Q, TAN H Z, HUI S E.Ash-related issues during biomass combustion: alkali-induced slagging, silicate melt-induced slagging (ash fusion), agglomeration, corrosion, ash utilization, and related countermeasures[J]. Progress energy combustion science, 2016, 52: 1-61.
[6] 李松阳, 刘建坤, 陈越, 等. 秸秆中钾元素对生物质成灰特性的影响研究[J]. 太阳能学报, 2019, 40(5): 1324-1329.
LI S Y, LIU J K, CHEN Y, et al.Study on effect of kalium element in straw on ash characteristics of biomss[J]. Acta energiae solaris sinica, 2019, 40(5): 1324-1329.
[7] RASHWAN T L, TORERO J L, GERHARD J I.Heat losses in applied smouldering systems: sensitivity analysis via analytical modelling[J]. International journal heat and mass transfer, 2021, 172: 121150.
[8] LU Z B.A diffusion-flame analog of forward smolder waves: (I) 1-D steady structures[J]. Combustion and flame, 2018, 196: 515-28.
[9] 熊绍武, 张守玉, 吴巧美, 等. 生物质炭燃烧特性与动力学分析[J]. 燃料化学学报, 2013, 41(8): 958-965.
XIONG S W, ZHANG S Y, WU Q M, et al.Investigation on combustion characteristics and kinetics of bio-char[J]. Journal of fuel chemistry technology, 2013, 41(8): 958-965.
[10] ANCA-COUCE A, SOMMERSACHER P, SHIEHNEJADHESAR A, et al.CO/CO₂ ratio in biomass char oxidation[J]. Energy procedia, 2017, 120: 238-245.
[11] ZOU R J, LUO G Q, CAO L, et al.Surface CO/CO₂ ratio of char combustion measured by thermogravimetry and differential scanning calorimetry[J]. Fuel, 2018, 233: 480-485.
[12] MORIN M, PECATE S, MASI E, et al.Kinetic study and modelling of char combustion in TGA in isothermal conditions[J]. Fuel, 2017, 203: 522-536.
[13] MORIN M, PECATE S, HEMATI M.Kinetic study of biomass char combustion in a low temperature fluidized bed reactor[J]. Chemical engineering journal, 2018, 331: 265-277.
[14] LUO L P, ZHANG Z Y, LI C, et al.Insight into master plots method for kinetic analysis of lignocellulosic biomass pyrolysis[J]. Energy, 2021, 233, 121194.
[15] 范方宇, 邢献军, 施苏薇, 等. 玉米秸秆成型生物炭燃烧特性与动力学分析[J]. 太阳能学报, 2019, 40(4): 1100-1106.
FAN F Y, XING X J, SHI S W, et al.Combustion characteristics and kinetics analysis of corn straw pellets and their biochars[J]. Acta energiae solaris sinica, 2019, 40(4): 1100-1106.
[16] YUAN Y Q, ZUO H B, WANG J X, et al.Co-combustion behavior, kinetic and ash melting characteristics analysis of clean coal and biomass pellet[J]. Fuel, 2022, 324: 124727.
[17] 任喜熙, 胡强, 杨海平, 等. 碱金属/碱土金属对生物质炭燃烧特性及反应动力学的影响研究[J]. 太阳能学报, 2021, 42(5): 483-487.
REN X X, HU Q, YANG H P, et al.Effect of alkali/alkaline earth metals on combustion characteristics and reaction kinetics of biochar[J]. Acta energiae solaris sinica, 2021, 42(5): 483-487.
[18] LI X J, HE F, CAI J M, et al.Oxidation kinetics of maize stover char at low temperature based on surface area and temperature correction[J]. Energy, 2022, 241: 122928.
[19] 徐通模, 惠世恩. 燃烧学[M]. 2版. 北京: 机械工业出版社, 2017: 207-281.
XU T M, HUI S E.Combustion[M]. 2nd ed. Beijing: China Machine Press, 2017: 207-281.
[20] MEHRABIAN R, ZAHIROVIC S, SCHARLER R, et al.A CFD model for thermal conversion of thermally thick biomass particles[J]. Fuel processing technology, 2012, 95: 96-108.
[21] YU K C, TAN Y F, ZHANG T T, et al.The traditional Chinese kang and its improvement: a review[J]. Energy and buildings, 2020, 218: 110051.
[22] YU K C, BAI L, ZHANG T T, et al.Improving the thermal performance of the traditional Chinese Kang system by employing smoldering combustion and mechanical ventilation: an experimental study[J]. Energy and buildings, 2022, 256: 111736.