Chemical looping gasification of lignocellulosic biomass with iron-based oxygen carrier: Products distribution and kinetic analysis on gaseous products from cellulose
Chemical looping gasification of lignocellulosic biomass with iron-based oxygen carrier: Products distribution and kinetic analysis on gaseous products from cellulose
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铁基氧载体化学链气化木质纤维素生物质：纤维素气态产物的产物分布和动力学分析
DOI：
10.1016/j.fuproc.2019.05.021
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发表时间：
2019-10
影响因子：
7.5
通讯作者：
Yang Bolun
中科院分区：
文献类型：
--
作者：
Wu Zhiqiang;Zhang Bo;Wu Song;Li Guangming;Zhao Shidi;Li Yaowu;Yang Bolun
研究了纤维素与Fe 2 O3化学链气化反应的产物分布和动力学。根据热力学模拟结果，产品H2的最佳汽化温度为850 °C。采用管式炉反应器结合在线质谱技术考察了反应温度和载氧体配比对产物分布的影响。当Fe 2 O3混合比为10%时，气相产物含量最高，这可能是由不完全氧化向完全氧化过渡造成的。动力学参数，如活化能的气相产物，通过等转化率法获得。CLG过程可以降低气体产物CO2、CH 4和H2的活化能，其中CO2的活化能最高（79.21 kJ/mol）。使用SEM分析固相产物的表征。固相产物含量随着温度的升高而略微降低，因为在升高的温度下较高的碳转化率。随着Fe 2 O3掺量的增加，CE的表面形貌由块状变为相对疏松的结构，颗粒也发生聚集，这可能有利于反应的进行。本文为阐明生物质有机组分化学链气化的热力学和动力学提供了参考。
Product distribution and kinetics analysis of chemical looping gasification (CLG) of cellulose with Fe2O3were investigated. Based on the thermodynamic simulation, the optimum vaporization temperature of the product H2was 850 °C. The influence of reaction temperatures and oxygen carrier mixing ratios on product distribution were explored via tube furnace reactor combined with on-line mass spectrometry. When the Fe2O3mixing ratio was 10%, the gas phase product content was the highest, which may be caused by the incomplete oxidation transition to complete oxidation. Kinetic parameters such as the activation energy of the gas phase product were obtained by an isoconversion method. The CLG process could reduce the activation energy of gaseous products of CO2, CH4,and H2, and the activation energy of CO2(79.21 kJ/mol) was the highest. Characterization of solid phase products analyzes using SEM. The solid phase product content decreases slightly with increasing temperature because of the higher carbon conversion at elevated temperatures. As the Fe2O3blending ratio increased, the surface morphology of CE changed from bulk to relatively loose structure, and the particles also aggregate, which may be beneficial to the reaction. This paper provides a reference for clarifying the thermodynamics and kinetics of chemical looping gasification of biomass organic components.
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