Hydrothermal Degradation of Cellulose at Temperature from 200 to 300 °C
Hydrothermal Degradation of Cellulose at Temperature from 200 to 300 °C
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DOI：
10.1021/acs.iecr.8b00332
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发表时间：
2018-05-09
影响因子：
4.2
通讯作者：
Skerget, Mojca
中科院分区：
文献类型：
--
作者：
Gagic, Tanja;Perva-Uzunalic, Amra;Skerget, Mojca
纤维素在间歇反应器中用亚临界水处理，温度范围为200-300℃，反应时间为5-60分钟。对其主要物相进行了分离和分析，包括水溶物、丙酮可溶物和固体残留物(残留的纤维素或焦炭)。水溶相的分析采用配有UV和RI检测器的高效液相色谱，丙酮可溶相的分析采用GC-MS。总糖含量测定采用苯酚-硫酸比色法。用气体吸附法测定了焦炭的比表面积、孔体积和孔径等性能。水溶相主要由糖单体和单体降解产物组成，丙酮可溶相又称生物油，由呋喃、酚、羧酸、醛、酮和高分子化合物组成。在此基础上，提出了纤维素在亚临界水中的反应机理。
Cellulose was treated with subcritical water in a batch reactor within a temperature range of 200-300 degrees C and reaction time of 5-60 min. The main phases, such as water-soluble fraction, acetone-soluble fraction and solid residue (remaining cellulose or char), were separated and analyzed. The analysis of water-soluble phase was done by HPLC equipped with UV and RI detector, whereas acetone-soluble phase was analyzed by GC-MS. Total sugar content was determined by the phenol-sulfuric acid colorimetric method. The properties of char such as specific surface area, pore volume, and pore diameter were determined by gas adsorption method. A water-soluble phase mainly consists of sugar monomers and monomer degradation products, while acetone-soluble phase, referred to also as bio-oil, consists of furans, phenols, carboxylic acids, aldehydes, ketones, and high molecular compounds. The reaction mechanism of cellulose in subcritical water has been proposed based on the obtained results.