通过 H2SO4 预处理提高木质生物质热解生物油产量。
Enhancement of bio-oil production via pyrolysis of wood biomass by pretreatment with H2SO4.
机构信息
Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Japan Society for the Promotion of Science, 8 Ichibancho, Chiyoda-ku, Tokyo 102-8472, Japan.
Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
出版信息
Bioresour Technol. 2015 Feb;178:76-82. doi: 10.1016/j.biortech.2014.09.146. Epub 2014 Oct 13.
In this work, a Japanese cedar wood sample was treated during the first step at ambient temperature and atmospheric pressure using several concentrations of sulfuric acid (H2SO4) in a stirred flask. During this pretreatment C-O bonds of cellulose, hemicellulose, and lignin were cleaved. The second step involved the pyrolysis of the pretreated wood sample at 550 °C in a quartz glass tube reactor. A maximum oil yield of 46.8 wt% with the minimum char yield of 10.1 wt% was obtained by the treatment with 3 M H2SO4, whereas untreated wood samples resulted in a 30.1 wt% yield of oil. The main components in the oils were levoglucosan and tar. These results suggest that moderate acid pretreatment produced shorter chain units of cellulose, hemicellulose, and lignin, thereby facilitating the conversion into oil by pyrolysis. The results of thermogravimetry-mass spectroscopy supported the presence of shorter chain units in the pretreated wood samples.
在这项工作中，首先在环境温度和常压下，使用几种浓度的硫酸（H2SO4）在搅拌瓶中处理日本雪松木材样本。在此预处理过程中，纤维素、半纤维素和木质素的 C-O 键被切断。第二步是在石英玻璃管反应器中，将预处理后的木材样品在 550°C 下进行热解。用 3M H2SO4 处理可得到最大产油率为 46.8wt%、最小产炭率为 10.1wt%的油，而未经处理的木材样品的油产率为 30.1wt%。油中的主要成分是左旋葡聚糖和焦油。这些结果表明，适度的酸预处理产生了较短的纤维素、半纤维素和木质素链单元，从而有利于通过热解转化为油。热重-质谱的结果支持预处理木材样品中存在较短的链单元。
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