Li Kai, Wang Bo, Bolatibieke Dana, Nan Dong-Hong, Lu Qiang
National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing, China.
Front Chem. 2020 May 19;8:436. doi: 10.3389/fchem.2020.00436. eCollection 2020.
A new method was proposed for polygeneration of phenol and supercapacitor electrode material from pyrolysis of biomass impregnated with ammonium dihydrogen phosphate (NHHPO). The pyrolysis experiments were executed to demonstrate the product distributions under different NHHPO-to-poplar (PA-to-PL) ratios and pyrolysis temperatures in a lab-scale device. The results revealed that the phenol yield attained its optimal value of 4.57 wt% with a satisfactory selectivity of 20.09% at 500°C under PA-to-PL ratio of 0.6. The pyrolytic solid product obtained at this condition was then subjected to high temperature activation directly without additional activators to prepare N and P co-doped activated carbon (NPAC) as supercapacitor. The physicochemical analysis of NPAC showed that the N and P contents in NPAC reached 3.75 and 3.65 wt%, respectively. The electrochemical experiments executed in a three-electrode system indicated that the NPAC exhibited promising electrochemical performance with a satisfactory capacitance of 181.3 F g at 1 A g.
提出了一种由浸渍磷酸二氢铵（NH₄H₂PO₄）的生物质热解联产苯酚和超级电容器电极材料的新方法。在实验室规模的装置中进行了热解实验，以展示在不同的磷酸二氢铵与杨树（PA-to-PL）比例和热解温度下的产物分布。结果表明，在PA-to-PL比例为0.6、500°C时，苯酚产率达到最佳值4.57 wt%，选择性为20.09%。然后，在此条件下获得的热解固体产物直接进行高温活化，无需额外的活化剂，以制备作为超级电容器的氮磷共掺杂活性炭（NPAC）。NPAC的物理化学分析表明，NPAC中的氮和磷含量分别达到3.75 wt%和3.65 wt%。在三电极系统中进行的电化学实验表明，NPAC表现出良好的电化学性能，在1 A g时电容为181.3 F g。
