Probing Synergies between Lignin-Rich and Cellulose Compounds for Gasification
Probing Synergies between Lignin-Rich and Cellulose Compounds for Gasification
复制标题
DOI：
10.3390/en13102590
复制
发表时间：
2020-05
期刊：
影响因子：
3.2
通讯作者：
Martin J. Taylor;A. Michopoulos;A. Zabaniotou;V. Skoulou
中科院分区：
文献类型：
--
作者：
Martin J. Taylor;A. Michopoulos;A. Zabaniotou;V. Skoulou
采用固定床气化技术，研究了富钠木质素粉红(LP)和纤维素微晶(CM)两种模型化合物之间的协同作用。反应条件采用当前木材气化炉在750℃和850℃时最常用的空气系数。研究发现，随着混合物中木质素含量的增加，从固体到气体产物的选择性发生了变化，这与以前对热解进行的类似研究相反。产物结构的这种变化是由焦炭表面Na边退缩沉积的催化作用所促进的。结果表明，在850℃时，LP48CM52混合气在所有空气系数下的水煤气变换反应都得到了加强。产生的H2和COX之间的强烈相关性证明了这一点。同时，通过降低混合物中木质素的含量，发现纤维素微晶的反应性在较高的温度下产生更多的焦炭，类似于木质素混合物在热解时的反应。
The fixed-bed gasification of lignin-rich and -deficient mixtures was carried out to probe the synergistic effects between two model compounds, Lignin Pink (LP) rich in Na and Cellulose Microcrystalline (CM). Reaction conditions utilized the most commonly used air ratios in current wood gasifiers at 750 and 850 °C. It was found that by increasing the lignin content in the mixture, there was a selectivity change from solid to gas products, contrary to a similar study previously carried out for pyrolysis. This change in product mix was promoted by the catalytic effect of Na edge recession deposits on the surface of the char. As a result, the water gas shift reaction was enhanced at 850 °C for the LP48CM52 mixture across all air ratios. This was evidenced by a strong correlation between the produced H2 and COx. Meanwhile, by lowering the lignin content in the mixtures, the reactivity of cellulose microcrystalline was found to generate more char at higher temperatures, similar to lignin mixtures when undergoing pyrolysis.