【摘 要】
：
甲烷在预还原的LaC0O3催化剂上分解生成碳纳米管(CNTs).研究了稳态下NO在CNTs,Rh/CNTs,Rh/Al2O3上的分解,温度区间为573 K～973 K,原料气为6 000 ppm的NO,He为平衡气.程序升温
【基金项目】
：
the Intellectual Innovation Project of The Chinese Academy of Sciences;
论文部分内容阅读
甲烷在预还原的LaC0O3催化剂上分解生成碳纳米管(CNTs).研究了稳态下NO在CNTs,Rh/CNTs,Rh/Al2O3上的分解,温度区间为573 K～973 K,原料气为6 000 ppm的NO,He为平衡气.程序升温还原结果表明:(1)Rh的负载显著降低了CNTs的氢吸收量;(2)负载于CNTs上的Rh比负载于Al2O3上的Rh更易还原.在573 K时NO即能与预还原后的CNTs,Rh/CNTs,Rh/Al2O3中存储的氢反应;随着氢的消耗,反应活性逐渐降低,当储存的氢消耗完后,NO的直接催化反应发生.在873 K及以上,Rh/CNTs中的CNTs能被NO分解产生的氧氧化为CO.在973 K时,NO在CNTs上几乎能100％分解,连续反应150 min后其反应活性不降低,且未观察到CO或CO2的生成.在973 K时CNTs本身可作为NO分解的催化剂,这是一个非常有意义的结果.
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