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.

在本文中，实施了太阳能二元化学解聚，即太阳能热电化学过程（STEP），以将木质素有效分解为小分子和氢。与常规的一元化学热解相比，木质素的太阳能二元化学解聚具有低焦化的液化和气化效率，并且伴随有大量的氢气产生。通过电解的干预，STEP工艺的反应温度大大降低。结果表明，在340°C，0.4 A恒定电流下，木质素的总转化率和液化率分别为87.22％和57.72％。进一步的特征表明，通过热解和电解的结合，木质素已成功地分解成具有高附加值的小分子和氢。经过STEP工艺后，木质素水溶液中的团聚体粒径和色度明显降低。