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Investigation of holocellulose-lignin interactions during pyrolysis of wood meal by TGA-FTIR
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2021-04-12 , DOI: 10.1007/s13399-021-01455-4
Wei Yang , Fan Yang , Xu Zhang , Pengfei Zhu , Huanghu Peng , Zezhou Chen , Lei Che , Shouxin Zhu , Shengji Wu

Pyrolysis of wood meal, a holocellulose-lignin mixture, holocellulose, and lignin was carried out using TGA-FTIR to investigate the effects of holocellulose-lignin interactions on the pyrolysis behavior of wood meal, in this study. The interactions between holocellulose and lignin showed no obvious effects on the pyrolysis behavior of holocellulose in wood meal at temperatures under 325 °C. However, the interactions did inhibit the pyrolysis of both lignin and holocellulose at higher temperatures, probably because of the high energy needed to dissociate the covalent linkages between holocellulose and lignin. Only a portion of covalent linkages were cracked at the temperatures of 215–395 °C, whereas they could be just barely destroyed at 395–565 °C. The char generated from holocellulose that was connected with lignin by unabridged covalent linkages would inhibit the decomposition of lignin at high pyrolysis temperatures by adsorbing on its surface, resulting in a higher char residue yield compared to that of the holocellulose-lignin mixture after pyrolysis.



中文翻译:

TGA-FTIR研究木粉热解过程中全纤维素-木质素的相互作用

在本研究中,使用TGA-FTIR对木粉,全纤维素-木质素混合物,全纤维素和木质素进行热解,以研究全纤维素-木质素相互作用对木粉热解行为的影响。木质纤维素与木质素之间的相互作用对温度在325°C以下的木粉中纤维素的热解行为没有明显影响。然而,相互作用确实抑制了木质素和全纤维素在更高温度下的热解,这可能是由于解离全纤维素和木质素之间的共价键所需的高能量。在215–395°C的温度下,只有一部分共价键断裂,而在395–565°C的温度下它们几乎不能被破坏。

更新日期:2021-04-13
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