Solar binary chemical depolymerization of lignin for efficient production of small molecules and hydrogen
Solar binary chemical depolymerization of lignin for efficient production of small molecules and hydrogen
复制标题
木质素的太阳能二元化学解聚，有效生产小分子和氢气
DOI：
10.1016/j.biortech.2018.10.032
复制
发表时间：
2019
影响因子：
11.4
通讯作者：
Wang Baohui
中科院分区：
文献类型：
--
作者：
Wang Jiaqi;Yan Chao;Zhu Lingyue;Gu Di;Zhang Dan;Wang Hongming;Wang Baohui
为了有效地将木质素分解为小分子和氢气，本文采用了太阳能二元化学解聚，即太阳能热电化学法(STEP)。与传统的单一化学热解方法相比，太阳能二元化学解聚木质素具有液化和气化效率高、焦炭含量低、产氢量大等优点。电解的介入大大降低了分步过程的反应温度。结果表明，在340 °C恒流0.4A条件下，木质素的总转化率和液化率分别为87.22%和57.72%。进一步的表征表明，热解和电解相结合的方法成功地将木质素分解为高附加值的小分子氢气。分级处理后，木质素水溶液中聚集体的粒径和色度明显减小。
In this paper, solar binary chemical depolymerization, that is Solar Thermal Electrochemical Process (STEP), was implemented for an effective breaking of lignin into small molecules and hydrogen. Compared with the conventional unitary chemical thermolysis, solar binary chemical depolymerization of lignin has high efficiencies of the liquefaction and gasification with the low coke, and accompanied by the abundant production of hydrogen. And the reaction temperature of the STEP process was greatly lowered by an intervention of the electrolysis. The results showed that the total conversion and liquefaction of the lignin yielded 87.22% and 57.72% under a constant current of 0.4 A at 340 °C. Further characterizations show that lignin has been successfully decomposed into small molecules with high added-value and hydrogen by a combination of the thermolysis and electrolysis. And the particle size of aggregates and the color degree in the lignin aqueous solution was obviously decreased after the STEP process.