Effect of Particle Microstructure on Sulfuric Acid Distribution During Biomass Hydrolysis
Effect of Particle Microstructure on Sulfuric Acid Distribution During Biomass Hydrolysis
复制标题
颗粒微观结构对生物质水解过程中硫酸分布的影响
DOI：
10.1080/15567036.2012.688089
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发表时间：
2015-11
期刊：
影响因子：
--
通讯作者：
Yuan Z.
中科院分区：
文献类型：
--
作者：
Qi W.;Zhuang X.;Zhang Y.;Wang Q.;Yu Q.;Yuan Z.
用硫酸水解生物质时，除了宏观因素（反应温度、酸浓度、反应时间、料液比）外，酸在生物质颗粒中的扩散速率也是影响水解的重要因素。本文以松木锯末为试验材料（温度：433.15 ~ 463.15 K，硫酸浓度：10 Kg/m3， L/S比：9，反应时间：0 ~ 1800秒），通过研究锯末与酸溶液组成的非均相中的扩散特性，建立了硫酸的分布模型。模型计算结果与实验结果的对比表明，所建立的模型能较好地预测硫酸在木屑颗粒中的扩散过程。基于该分布模型，研究了颗粒微观结构对硫酸浓度分布的影响。结果表明，粒径和孔隙度是影响硫酸在水解过程中扩散的重要因素，孔隙度的影响包括弯曲度的影响。本研究对反应过程中硫酸在体流和颗粒内的分布进行了数值描述，对进一步研究生物质水解机理具有重要意义。
When sulfuric acid is used to hydrolyze biomass, besides the macro factors (reaction temperature, acid concentration, reaction time, and ratio of solid to liquid), the diffusion rate of the acid into the biomass particle is also an important factor that affects the hydrolysis. In this article, pine wood sawdust was taken as test material (temperature: 433.15–463.15 K; sulfuric acid concentration: 10 Kg/m3; ratio of L/S: 9; reaction time: 0–1,800 sec) and a distribution model of sulfuric acid was established by studying the diffusion characteristics in the heterogeneous phase consisting of sawdust and acid solution. Comparison between the calculated results from the model and experimental ones proved that the established model could satisfactorily predict the diffusion process of sulfuric acid into the sawdust particle during the reaction. Based on the distribution model, the effects of particle microstructure on the sulfuric acid concentration distribution were investigated. It indicates that particle size and porosity are the important factors that affect sulfuric acid diffusion in hydrolysis and the effect of porosity includes that from tortuosity. This study has a numerical description of sulfuric acid distribution in the bulk flow and within the particle during the reaction, and is of great significance in the further study of biomass hydrolysis mechanism.
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影响因子：
11.4
作者：
Sung Bae Kim;Y. Y. Lee-Y.
通讯作者：
Sung Bae Kim;Y. Y. Lee-Y.
影响因子：
2.1
作者：
S. Ranganathan;D. G. Macdonald;N. Bakhshi
通讯作者：
S. Ranganathan;D. G. Macdonald;N. Bakhshi
影响因子：
3
作者：
L. M. Tillman;Y. Y. Lee-Y.;R. Torget
通讯作者：
L. M. Tillman;Y. Y. Lee-Y.;R. Torget
影响因子：
1.2
作者：
Hao, L;Lu, RH;Leaist, DG
通讯作者：
Leaist, DG
影响因子：
2.1
作者：
Qi, Wei;Zhang, Suping;Yan, Yongjie
通讯作者：
Yan, Yongjie