Co-pyrolysis behavior of microalgae biomass and low-quality coal: Products distributions, char-surface morphology, and synergistic effects
Co-pyrolysis behavior of microalgae biomass and low-quality coal: Products distributions, char-surface morphology, and synergistic effects
复制标题
微藻生物质与劣质煤的共热解行为：产物分布、炭表面形态和协同效应
DOI：
10.1016/j.biortech.2018.01.141
复制
发表时间：
2018-05-01
影响因子：
11.4
通讯作者：
Yang, Bolun
中科院分区：
文献类型：
--
作者：
Wu, Zhiqiang;Yang, Wangcai;Yang, Bolun
采用固定床反应器和在线质谱技术研究了低阶煤与绿色藻类（GA）共热解过程中主要挥发性产物的分布和释放特性。利用扫描电镜结合分形理论定量描述了半焦的表面形貌。从产物的产率和主要气体产物的组成来看，存在不同形式的协同效应。在600 ~ 850 ℃温度范围内，GA的用量为25%时，焦油产率有明显的协同效应，表明GA促进了焦油的生成。当GA的质量分数为50%时，H2-和CO的含量呈现相反的协同效应。除650 ℃外，共热解半焦的分形维数均小于计算值，说明GA促进了半焦表面的均匀性。本研究为共热解过程中操作参数的合理选择提供了必要的数据。
In this work, the distributions and releasing properties of the primary volatile products during co-pyrolysis of low-rank coal and green algae (GA) has been studied using fixed-bed reactor with online mass spectrometry. Surface morphology of the char was described quantitatively by SEM combined with fractal theory. Different forms of synergistic effects existed from both the yields of products and composition of the main gaseous products. Positive synergistic effects from tar yield were observed under 25% of GA from 600 to 850 degrees C, indicating GA promoted the formation of tar. Opposite synergistic effects on the content of H-2 and CO were gained when the mass ratio of GA was 50%. The fractal dimensions of co-pyrolysis char were less than the calculated values except under 650 degrees C, which meant the GA promoted the homogeneity of char surface. This work could provide essential data for proper operation parameters selecting for co-pyrolysis.