Effects of post-pyrolysis air oxidation on the chemical composition of biomass chars investigated by solid-state nuclear magnetic resonance spectroscopy
Effects of post-pyrolysis air oxidation on the chemical composition of biomass chars investigated by solid-state nuclear magnetic resonance spectroscopy
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DOI：
10.1016/j.carbon.2019.07.004
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发表时间：
2019-11-01
期刊：
影响因子：
10.9
通讯作者：
Schmidt-Rohr, Klaus
中科院分区：
文献类型：
--
作者：
Cao, Xiaoyan;Xiao, Feng;Schmidt-Rohr, Klaus
利用固体核磁共振（NMR）技术研究了生物质焦在热空气氧化过程中的化学变化。后热解空气氧化（PPAO）适用于缺氧制备的枫木和山核桃壳焦在PPAO温度范围从300至600摄氏度长达40分钟。C-13 NMR数据表明，PPAO处理引入氧功能的芳环，主要是C-O和C=O，但也羧基（COO）后，光谱编辑确定。COO的浓度相对较低（
Solid-state nuclear magnetic resonance (NMR) spectroscopy was used to characterize the chemical changes induced by thermal air oxidation of biomass chars. Post-pyrolysis air oxidation (PPAO) was applied to anoxically-prepared maple-wood and pecan-shell chars at PPAO temperatures ranging from 300 to 600 degrees C for up to 40 min. The C-13 NMR data showed that PPAO treatment introduced oxygen functionalities into aromatic rings, primarily C-O and C=O, but also carboxyl groups (COO) identified after spectral editing. The concentration of COO was relatively low (