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甲烷在Co Mo/HZSM 5催化剂上进行无氧芳构化反应的评价结果表明 ,Co的添加大大提高了Mo/HZSM 5催化剂在反应过程中的稳定性 .BET实验证明 ,反应后的积炭对Co Mo/HZSM 5催化剂孔道堵塞的程度较小 .对积炭催化剂进行的一系列程序升温表面反应 (如TPH ,TPCO2 和TPO)结果表明 ,TPO谱上有两个峰温明显不同的烧炭峰 ,Co的添加明显抑制了高温积炭的生成 .H2 主要与高温积炭发生反应 ,这部分积炭是催化剂失活的主要原因 ;CO2 对低温积炭的影响则尤为明显 .TEM结果表明 ,积炭催化剂上存在丝状积炭物种 .碳丝不能与H2 反应 ,但能被CO2 除去 .Co的添加促进了丝状积炭物种的生成 ,碳丝并不是导致催化剂失活的因素
The results of the anaerobic aromatization of methane over Co Mo / HZSM 5 showed that the addition of Co greatly enhanced the stability of the Mo / HZSM 5 catalyst during the reaction.ETET demonstrated that after the reaction, Co Mo / HZSM 5 catalyst was less clogged.The results of a series of temperature-programmed surface reactions (such as TPH, TPCO 2 and TPO) on the coke catalysts showed that there were two peaks of carbon monoxide on TPO spectra with different peak temperatures , Co addition significantly inhibited the formation of high temperature carbon deposition .H2 mainly reacts with high temperature carbon deposition, this part of the carbon deposition is the main reason for the catalyst deactivation; CO2 on the low temperature carbon deposition is particularly evident .TEM results show that the product The carbonaceous catalyst has filamentous carbon deposit species, which can not react with H2 but can be removed by CO2.The addition of Co promotes the formation of filamentous carbon deposit species, and the carbon filament is not the factor leading to catalyst deactivation