Catalytic oxidation of NO by activated carbon fiber (ACF)
Catalytic oxidation of NO by activated carbon fiber (ACF)
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DOI：
10.1016/j.cej.2005.10.007
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发表时间：
2006-02-01
影响因子：
15.1
通讯作者：
Verma, N
中科院分区：
文献类型：
--
作者：
Adapa, S;Gaur, V;Verma, N
在填充床管式反应器中，在不同的反应温度（30-80 ° C）和入口NO（100-400 ppm）和O2（5-100%）浓度下，在基于各种前体的活性炭纤维（ACF）上进行NO的催化氧化。NO的最大转化率在30 ℃的反应温度和增加O-2浓度。酚醛树脂基活性炭纤维的性能上级粘胶纤维和沥青基活性炭纤维。通过改变活化温度（800-1000 ℃）、活化剂（CO2和水蒸汽）和活化时间（30-90 min），对相应的碳纤维原料进行碳化和活化，在实验室中合成了酚醛树脂基ACF样品。ACF的表面表征与其氧化特性的关系的结果表明，NO的氧化有利于ACF样品具有相对较小程度的CO释放表面O-2官能团。提出了一种NO氧化的表面动力学机制，并将其纳入一个运输模型来解释实验突破数据。(c)2005 Elsevier B. V.保留所有权利。
Catalytic oxidation of NO was carried out on activated carbon fibers (ACFs) based on various precursors in a packed bed tubular reactor under varying reaction temperatures (30-80 degrees C) and inlet NO (100-400 ppm) and 02 (5-100%) concentrations. Maximum conversion of NO was obtained at the reaction temperature of 30 degrees C and with increasing O-2 concentrations. The performance of the phenolic resin-based ACF was found to be superior to that of the viscose rayon and pitch-based ACFs. The phenolic resin-based ACF samples were also synthesized in the laboratory by carrying out carbonization and activation of the corresponding raw carbonaceous fibers under varying activation temperatures (800-1000 degrees C), activation agents (CO2 and steam) and activation time (30-90 min). The results of the surface characterization of ACF in relation to their oxidation characteristics revealed that the oxidation of NO was favored on the ACF samples having relatively lesser extent of the CO evolving surface O-2 functional groups. A surface kinetic mechanism for the oxidation of NO was proposed and incorporated in a transport model developed to explain the experimental breakthrough data. (c) 2005 Elsevier B.V. All rights reserved.