ESTABLISHMENT AND APPLICATION OF EVAPORATION MODEL OF PARTIAL PRESSURE OF POTASSIUM CHLORINE IN STRAW COMBUSTION

Li Xiuhua; Su Xianqiang; Li Xiangjie; Zhao Rongkui; Wang Hailiang; He Fang

doi:10.19912/j.0254-0096.tynxb.2020-0756

PDF(2126 KB)

Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 474-479. DOI: 10.19912/j.0254-0096.tynxb.2020-0756

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

ESTABLISHMENT AND APPLICATION OF EVAPORATION MODEL OF PARTIAL PRESSURE OF POTASSIUM CHLORINE IN STRAW COMBUSTION

Li Xiuhua^1,2, Su Xianqiang¹, Li Xiangjie¹, Zhao Rongkui¹, Wang Hailiang², He Fang¹

Author information +

History +

Abstract

The objective of this study is to investigate the release characteristics of potassium（K）and calculate its release rate during biomass combustion.Chemical forms of potassium in corn stover and its ashes were analyzed using X-ray fluorescence （XRF）,X-Ray diffraction （XRD）. Release characteristics of potassium chloride （KCl） at normal combustion temperatures was measured using simultaneous thermogravimetric analyzer （STA）. A model considering transport resistance from porous medium and partial pressure of KCl was developed to calculate the evaporation rate of KCl in corn-stover-ash. Results show that KCl and K₂SO₄ are the main species of potassium, accounts for about 13% of corn-stover-ash. Evaporation is the main way of the KCl release at normal combustion temperatures. Vapor pressure of KCl in molten phase is decreased via eutectic melting of KCl and K₂SO₄; The calculation agrees well with the experimental results.

Key words

biomass energy / combustion / potassium chloride / evaporation model / partial pressure / porous media

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Li Xiuhua, Su Xianqiang, Li Xiangjie, Zhao Rongkui, Wang Hailiang, He Fang. ESTABLISHMENT AND APPLICATION OF EVAPORATION MODEL OF PARTIAL PRESSURE OF POTASSIUM CHLORINE IN STRAW COMBUSTION[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 474-479 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0756

References

[1] 秦建光, 余春江, 李双江, 等. 循环流化床秸秆燃烧中的碱金属迁徙转化研究[J]. 太阳能学报, 2009, 30(5): 667-672.
QIN J G, YU C J, LI S J, et al. The transportation and transformation of alkali metals in straw-fired CFB boilers[J]. Acta energiae solaris sinica, 2009, 30(5): 667-672.
[2] 宋兴飞, 朱少飞, 黄兵, 等. 生物质燃烧过程中氯及钾析出特性研究[J]. 太阳能学报, 2015, 36(10): 2543-2546.
SONG X F, ZHU S F, HUANG B, et al. Study of emission characteristics of chlorine and potassium in biomass combustion[J]. Acta energiae solaris sinica, 2015, 36(10): 2543-2546.
[3] NIU Y Q, TAN H Z, HUI S.Ash-related issues during biomass combustion: alkali-induced slagging, silicate melt-induced slagging (ash fusion), agglomeration, corrosion, ash utilization, and related countermeasures[J]. Progress in energy and combustion science, 2016, 52: 1-61.
[4] 秦建光, 余春江, 聂虎, 等. 秸秆燃烧中温度对钾转化与释放影响[J]. 太阳能学报, 2010, 31(5): 540-544.
QIN J G, YU C J, NIE H, et al. The effect of temperature on transformation and release of potassium during straw combustion[J]. Acta energiae solaris sinica, 2010, 31(5): 540-544.
[5] JOHANSEN J M, JAKOBSEN J G, FRANDSEN F J, et al. Release of K, Cl, and S during pyrolysis and combustion of high-chlorine biomass[J]. Energy & fuels, 2011, 25(11): 4961-4971.
[6] 余春江, 骆仲泱, 张文楠, 等. 碱金属及相关无机元素在生物质热解中的转化析出[J]. 燃料化学学报, 2000, 28(5): 420-425.
YU C J, LUO Z Y, ZHANG W N, et al. Inorganic material emission during biomass pyrolysis[J]. Journal of fuel chemistry and technology, 2000, 28(5): 420-425.
[7] JENSEN P A, FRANDSEN F J, DAM-JOHANSEN K.Experimental investigation of the transformation and release to gas phase of potassium and chlorine during straw pyrolysis[J]. Energy & fuels, 2000, 14: 1280-1285.
[8] ZHANG Z, SONG Q, ALWAHABI Z T, et al. Temporal release of potassium from pinewood particles during combustion[J]. Combustion and flame, 2015, 162(2): 496-505.
[9] MASON P E, JONES J M, DARVELL L I, et al. Gas phase potassium release from a single particle of biomass during high temperature combustion[J]. Proceedings of the combustion institute, 2017, 36(2): 2207-2215.
[10] 杨文, 纪晓瑜, 董凯, 等. 生物质燃烧过程中Cl及碱金属K、Na的析出特性[J]. 太阳能学报, 2015, 36(12): 3072-3075.
YANG W, JI X Y, DONG K, et al. Releasing characteristics of chlorine and alkali metals (K and Na) in process of biomass combustion[J]. Acta energiae solaris sinica, 2015, 36(12): 3072-3075.
[11] 杨世铭, 陶文铨.传热学[M]. 北京: 高等教育出版社, 2006: 543-546.
YANG S M, TAO W Q.Heat transfer[M]. Beijing: Higher Education Press, 2006: 543-546.
[12] TAYLOR R.Multicomponent mass transfer[M]. New York: John Wiley & Sons, 1993.
[13] HE F, LI X H, BEHRENDT F, et al. Critical changes of inorganics during combustion of herbaceous biomass displayed in its water soluble fractions[J]. Fuel processing technology, 2020, 198: 106231.
[14] ATKINS P, PAULA J D.Atkins’ physical chemistry[M]. 8th ed United Sates: Oxford University Press, 2006.