【摘要】 以高软化点煤沥青、热塑性酚醛树脂为原料,在机械混合条件下,制备出比表面积大、吸脱附时间短、机械强度高的沥青/树脂基活性炭。通过偏光显微镜(OM)、N2物理吸脱附、TEM及苯的静态吸脱附实验对不同复合比沥青/树脂基复合颗粒进行对比研究。实验结果表明:沥青基活性炭吸脱附时间短,酚醛树脂基活性炭的静态饱和吸附值大、机械强度高;而沥青/树脂基活性炭则兼具沥青基活性炭与酚醛树脂基活性炭的优点,在机械强度为6.5 N(CP/PF-50/50)、静态苯吸附值达到472 mg/g时,仅需60 min进行脱附。结构及性质变化的原因在于:两种前躯体分子结构的不同导致两者在高温煅烧过程中由于所受热应力的不同而产生一定程度的界面剥离,进而形成一定量的孔道结构。更多还原

【Abstract】 By mechanical mixing,pitch/resin-based activated carbon was prepared from high soft pointing coal-tar pitch and Novolac-phenolic resin which showed high specific surface area,short adsorption/desorption time and high mechanical strength.In this experiment,optical microscopy,N2 adsorption/desorption isotherms,transmission electron microscope and static benzene adsorption/desorption experiments were chosen to characterize the changes for different pitch/resin-based granules.The results showed that pitch-based activated carbon took shorter adsorption/desorption time and phenolic resin-based activated carbon embraced higher static adsorption capacitors and mechanical strength.What’s more,the pitch/resin-based activated carbon combines the advantages of the pitch-based activated carbon and phenolic resin-based activated carbon at the same time.For activated carbon CP/PF-50/50,the mechanism strength and static benzene capacitor reached 6.5 N and 472 mg/g,respectively,and only need 60 min for desorption process.The reason for this change may be caused by the thermal stress between pitch and phenolic resin during the pyrolysis which leads to form a large number of new pores.更多还原