Prediction of the lignocellulosic winery wastes behavior during gasification process in fluidized bed: Experimental and theoretical study
Prediction of the lignocellulosic winery wastes behavior during gasification process in fluidized bed: Experimental and theoretical study
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DOI：
10.1016/j.jece.2018.08.054
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发表时间：
2018-08-01
影响因子：
7.7
通讯作者：
Echegaray, Marcelo
中科院分区：
文献类型：
--
作者：
Rodriguez, Rosa;Mazza, German;Echegaray, Marcelo
本文介绍了木质纤维酒厂废弃物在流化床中气化获取能源的研究。基于火用分析，分析了不同运行变量对系统火用改善潜力（IP）和可持续性指数（SI）的影响。随着含水率、ER和SBR的增大，IP增大，SI减小。另一方面，随着温度的升高，这两个指标表现出相反的行为。研究的生物质废物的热分解在三个加热速率，5，10和15摄氏度/分钟下的蒸汽/空气混合物气氛下表明，气化发生在三个可见的阶段：水汽化，热解和最后一步与焦炭的反应由CO2。采用分布活化能模型法（DAEM）。分解反应不是一个单一的反应阶段，它包含了多个平行反应步骤对整体反应速率的贡献。最后，在室温和局部大气压下，对空气流化进行了分析。每个实验用100%和75%v木质纤维素废物进行。在所有研究的情况下，分离，段塞流和通道化。然而，沙粒的加入改善了两种酒厂废物的行为。
This work presents studies about the gasification of the lignocellulosic winery wastes in fluidized bed to obtain energy. Based on the exergy analysis, the exergetic improvement potential (IP) and sustainability index (SI) variations with different operational variables were analyzed. IP increases and SI decreases when moisture content, ER and SBR augment. On the other hand, both indexes present contrary behavior with the temperature increasing.Additionally, the kinetic behavior was investigated using a macro thermo-balance. The thermal decomposition of the studied biomass wastes at three heating rate, 5, 10 and 15 degrees C/min under steam/air mixture atmosphere show that the gasification takes place in three visible stage: water vaporization, pyrolysis and the last step associated with the reaction of the char by CO2. The distributed activation energy model method (DAEM) was used. The decomposition is not a single reaction stage, it includes the contributions of parallel reaction steps on the global reaction rate.Last, the fluidization was analyzed using air at room temperature and local atmospheric pressure. Each experiment was carried out with 100% and 75% v lignocellulosic wastes. Segregation, slugging and channelization in all studied cases. However, the addition of sand particles improves the behavior of both winery wastes.