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[方法]通过反应底物模拟吸附实验和BET表征方法,对双甘膦催化氧化制备草甘膦活性炭催化剂的失活原因与碱再生方法进行了研究。[结果]实验得出催化剂失活的原因为催化剂吸附的双甘膦等物质造成微孔比表面积和微孔孔容积的减小,从而使催化剂的活性下降。[结论]根据失活机理,采用NaOH溶液对失活催化剂进行了再生,实验结果表明:反应温度为180℃、碱炭质量比为1∶10、处理时间为90 min时,催化剂的再生效率可达52.0%。
[Method] The deactivation reason and alkali regeneration method of glyphosate - based activated carbon catalyst prepared by the catalytic oxidation of PMIDA were studied by means of reaction substrate simulated adsorption and BET characterization. [Result] The experimental results showed that the catalyst deactivation was caused by the decrease of pore specific surface area and micropore volume caused by the PMIDA adsorbed on the catalyst, and thus the activity of the catalyst was decreased. [Conclusion] According to the inactivation mechanism, the deactivated catalyst was regenerated by NaOH solution. The experimental results showed that the regeneration efficiency of the catalyst can be regenerated when the reaction temperature is 180 ℃, the mass ratio of alkali carbon is 1:10 and the treatment time is 90 min Up to 52.0%.