BIOMASS GASIFICATION KINETICS: INFLUENCES OF PRESSURE AND CHAR STRUCTURE
BIOMASS GASIFICATION KINETICS: INFLUENCES OF PRESSURE AND CHAR STRUCTURE
复制标题
生物质气化动力学：压力和焦结构的影响
DOI：
10.1080/00102200590917266
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发表时间：
2005
影响因子：
1.9
通讯作者：
Terry Wall
中科院分区：
文献类型：
--
作者：
Emre Çetin;B. Moghtaderi;Rajender Gupta;Terry Wall
摘要在这项研究中，使用热重分析（TGA）在800-950°C的温度范围内，CO2浓度为10 - 100%v/v，压力为1 - 20 bar，研究了来自不同生物质物种的焦的气化动力学。采用石英棉基质（QWM）法模拟循环流化床（CFB）工况。通过QWM方法获得的反应性结果进行了比较与使用TGA数据提取的那些。从TGA分析的动力学数据被认为是兼容的预测CFB气化反应性。研究了热解压力对半焦化学结构和半焦转化活性的影响。已经发现，压力在炭转化过程中对反应性没有影响，而在热解过程中对化学和物理结构有显著影响。Langmuir-Hinshelwood速率方程较好地描述了加压辐射松焦气化动力学。研究条件下的Langmuir-Hinshelwood表达式可以描述为动力学数据，在这项研究中发现与文献吻合良好。
ABSTRACT In this study, the gasification kinetics of chars from different biomass species have been investigated within the temperature range 800–950°C, CO2 concentrations of 10 to 100% v/v, and pressures between 1 and 20 bar using thermogravimetric analysis (TGA). The quartz wool matrix (QWM) method was used to simulate circulating fluidized-bed (CFB) conditions. The reactivity results obtained by the QWM method were compared with those extracted using TGA data. Kinetic data from TGA analyses was found to be compatible for predicting CFB gasification reactivity. Effects of pyrolysis pressure on the chemical structure of char and char conversion reactivities were also investigated. Pressure has been found to have no effect on reactivity during char conversion while having a dramatic effect on chemical and physical structure during the pyrolysis process. The Langmuir–Hinshelwood rate equation represents the pressurized radiata pine char gasification kinetics well. The Langmuir–Hinshelwood expression for studied conditions can be described as Kinetic data found in this study are in good agreement with the literature.