Electrical conductivity of beech sawdust using graphite catalytic coating: unlocking the microwave-assisted thermolysis efficiency of lignocellulosic biomass.
Electrical conductivity of beech sawdust using graphite catalytic coating: unlocking the microwave-assisted thermolysis efficiency of lignocellulosic biomass.
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DOI：
10.1039/d1se00610j
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发表时间：
2021-07-27
影响因子：
5.6
通讯作者：
Clark JH
中科院分区：
文献类型：
--
作者：
Bouxin FP;Fan J;Budarin VL;Clark JH
使用催化量的石墨（低至0.25wt%）的山毛榉锯屑的涂层允许微波辅助的热处理的步骤改进。结果表明，热解性能与涂层样品的电导率阈值有关，而不是逐渐增加。导电率低至0.13 mS m−1，0.75重量%的石墨涂层锯末（250-500 μm）可有效气化高达43重量%的气体（30重量%的一氧化碳，25体积%的氢气）。初始粒度影响热性能，其中最佳粒度（250-500 μm）由于有效的石墨涂层和锯末外部与内部之间的低温度梯度而提供高的热均匀性。小的初始粒度（75-250 μm）不适合微波热解，表现出对于用0.75wt%的石墨进行有效涂覆而言太大的表面积，这通过不存在电导率（<0.003 mS m-1）来证实。电导率可以用作评价样品用于微波辅助热解的适合性的标志。与简单的石墨混合不同，机械涂层允许感受器数量减少20倍以上，提供具有更高再现性的更均匀的样品。木屑的石墨催化涂层是朝着木质纤维素生物质的微波辅助热解的更高效率的一个步骤改进。
The coating of the beech sawdust using a catalytic amount of graphite (as low as 0.25 wt%) allowed a step improvement in the microwave-assisted thermolysis. Results demonstrated that the pyrolysis performance was linked to an electrical conductivity threshold of the coated samples rather than a gradual increase. With as low as 0.13 mS m−1 of electrical conductivity, the 0.75 wt% graphite coated sawdust (250–500 μm) was efficiently gasified with up to 43 wt% of gas (30 wt% of carbon monoxide, 25 vol% of hydrogen). Initial particle size impacted the thermolysis performance where optimal size (250–500 μm) provided high heat homogeneity due to efficient graphite coating and low temperature gradient between the outer and inner part of the sawdust. The small initial particle size (75–250 μm) was unsuitable for microwave pyrolysis, exhibiting a too large surface area for efficient coating with 0.75 wt% of graphite which was confirmed by the absence of electrical conductivity (<0.003 mS m−1). The electrical conductivity can be used as a marker to evaluate the suitability of the sample for microwave-assisted pyrolysis. Unlike simple graphite mixing, the mechanical coating allowed more than 20-fold decrease of susceptor quantity, providing more homogeneous samples with higher reproducibility. Graphite catalytic coating of the wood sawdust is a step-improvement toward higher efficiency of the microwave-assisted pyrolysis of lignocellulosic biomass.
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影响因子：
1.5
作者：
Hideno, Akihiro
通讯作者：
Hideno, Akihiro
影响因子：
38.3
作者：
Hernandez, Yenny;Nicolosi, Valeria;Coleman, Jonathan N.
通讯作者：
Coleman, Jonathan N.
影响因子：
10.4
作者：
Li, T.;Remon, J.;Budarin, V. L.
通讯作者：
Budarin, V. L.
影响因子：
11.4
作者：
Gong, Chunxiao;Huang, Jing;Wang, Decheng
通讯作者：
Wang, Decheng
影响因子：
3.2
作者：
Ellison, Candice;McKeown, Murat Sean;Boldor, Dorin
通讯作者：
Boldor, Dorin