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锌对高炉中焦炭非等温气化动力学的影响

Influence of Zinc on Nonisothermal Gasification Kinetics of Coke in a Blast Furnace.

作者信息

Wang Jie, Qie Liangliang, Hu Yuanqiang, Liu Hai, Zheng Genwen

机构信息

College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, Hubei 432000, China.

出版信息

ACS Omega. 2021 Oct 21;6(43):28838-28847. doi: 10.1021/acsomega.1c03726. eCollection 2021 Nov 2.

DOI:10.1021/acsomega.1c03726
PMID:34746576
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8567404/
Abstract

The effect of zinc on the kinetics of coke gasification was studied by a nonisothermal method. The results indicated that with the increase of zinc content, coke gasification tended to move to the low-temperature zone, it occurred earlier, and the reaction rate increased. The main curve fitting method was used to analyze the mechanism function of coke gasification before and after adding zinc. The modified shrinking core model was found to be the optimal mechanism function for coke gasification, with which the kinetic parameters obtained showed that the pre-exponential factor and apparent activation energy of coke gasification decreased significantly with the increase of zinc adsorption amount. Moreover, a kinetic compensation effect was found to exist in the effect of zinc on coke gasification. Combined with X-ray diffraction (XRD) and the peak fitting technique, it was found that the difference in the catalytic effect of zinc on coke gasification was attributed to the carbon structure.

摘要

采用非等温方法研究了锌对焦炭气化动力学的影响。结果表明，随着锌含量的增加，焦炭气化倾向于向低温区移动，发生得更早，且反应速率提高。采用主曲线拟合方法分析了添加锌前后焦炭气化的机理函数。发现修正的缩核模型是焦炭气化的最佳机理函数，由此获得的动力学参数表明，焦炭气化的指前因子和表观活化能随着锌吸附量的增加而显著降低。此外，发现锌对焦炭气化的影响存在动力学补偿效应。结合X射线衍射（XRD）和峰拟合技术，发现锌对焦炭气化催化效果的差异归因于碳结构。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/479d/8567404/0b9398664920/ao1c03726_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/479d/8567404/6280591aa05a/ao1c03726_0008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/479d/8567404/18b085dcbc49/ao1c03726_0012.jpg

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Kinetic models comparison for steam gasification of coal/biomass blend chars.煤/生物质共焦化动力学模型比较。
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Interaction and kinetic analysis for coal and biomass co-gasification by TG-FTIR.利用 TG-FTIR 进行煤与生物质共气化的相互作用和动力学分析。
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Co-gasification of tire and biomass for enhancement of tire-char reactivity in CO2 gasification process.废轮胎与生物质共气化提升轮胎炭在 CO2 气化过程中的反应活性。
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