SELECTIVE CATALYTIC REDUCTION OF N_2O WITH CH_4 AND N_2O DECOMPOSITION OVER FE-ZEOLITE CATALYSTS

机译：Fe-沸石催化剂上CH_4和N_2O分解的N_2O选择性催化还原

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The reaction mechanisms of selective catalytic reduction (SCR) of N_2O with CH_4 and N_2O decomposition over Fe ion-exchanged zeolite catalysts (Fe-BEA, Fe-MFI) were studied. In O_2-TPD studies, we observed new desorption peaks from Fe-BEA catalyst after N_2O treatment. However, the new adsorbed oxygen species hardly reacted with CH_4. This indicates that coexistence of N_2O and CH_4 is necessary for the high SCR activity. In infrared (FTIR) spectroscopy, most of Fe-OH species (the OH group on Fe ion species) took part in the N_2O+CH_4 reaction, and the methoxy and formate species were formed. The methoxy species were oxidized with N_2O more rapidly than O_2, while the formate species were oxidized with both N_2O and O_2 at almost the same rate. The isotopic tracer study using ~(18)O(a) showed that O_2 formation during N_2O decomposition proceeds via Eley-Rideal (ER) mechanism. A possible mechanism is discussed in terms of active oxygen species formed from N_2O, which may play an important role in the activation/oxidation of CH_4 at initial steps.

机译：研究了Fe离子交换沸石催化剂（Fe-BEA，Fe-MFI）对CH_2和CH_2分解的N_2O的选择性催化还原反应机理。在O_2-TPD研究中，我们观察到N_2O处理后，Fe-BEA催化剂出现了新的解吸峰。但是，新吸附的氧几乎不与CH_4反应。这表明N_2O和CH_4的共存对于高SCR活性是必要的。在红外（FTIR）光谱中，大多数Fe-OH物种（Fe离子物种上的OH基团）参与N_2O + CH_4反应，并形成了甲氧基和甲酸酯物种。 N_2O比O_2氧化甲氧基的速度更快，而N_2O和O_2氧化甲酸酯的速率几乎相同。使用〜（18）O（a）进行的同位素示踪研究表明，N_2O分解过程中O_2的形成通过Eley-Rideal（ER）机制进行。就由N_2O形成的活性氧种类讨论了一种可能的机制，该活性氧可能在初始步骤中对CH_4的活化/氧化起重要作用。

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《International Zeolite Conference pt.C; 20040425-30; Cape Town(ZA)》|2004年|P.2514-2521|共8页
会议地点 Cape Town(ZA)
作者
Nobukawa; T.; Yoshida; M.; Kameoka; S.; Ito; S.; Tomishige; K.; Kunimori; K.;
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Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan;

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正文语种 eng
中图分类沸石族;
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1. Catalytic decomposition of N_2O and catalytic reduction of N_2O and N_2O + NO by NH_3 in the presence of O_2 over Fe-Zeolite [J] . Ariel Guzman-Vargas, Gerard Delahay, Bernard Coq Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications . 2003,第4期

机译：Fe-沸石上O_2存在下NH_2催化N_2O分解及NH_3催化还原N_2O和N_2O + NO
2. In-Situ Observation of Reaction Intermediate in the Selective Catalytic Reduction of N_2O with CH_4 over Fe Ion-Exchanged BEA Zeolite Catalyst for the Elucidation of Its Reaction Mechanism Using FTIR [J] . Takeshi Nobukawa, Masanori Yoshida, Satoshi Kameoka, The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical . 2004,第13期

机译：铁离子交换BEA沸石催化剂上CH_4选择性催化还原N_2O与CH_4反应中间体的原位观察以阐明FTIR反应机理
3. The Selective Catalytic Reduction of N_2O with CH_4 over Fe-BEA catalyst [J] . Takeshi Nobukawa, Masanori Yoshida, Satoshi Kameoka 触媒 . 2003,第6期

机译：Fe-BEA催化剂上CH_4选择性催化还原N_2O
4. Selective catalytic reduction of N_2O with light alkanes and N_2O decomposition over Fe-BEA zeolite catalysts [C] . T. Nobukawa, K. Kita, S. Tanaka, Impact of Zeolites and Other Porous Materials on the New Technologies at the Beginning of the New Millennium . 2002

机译：Fe-BEA沸石催化剂上轻烷烃选择性催化还原N_2O和N_2O分解
5. Investigation of the reaction network and catalytic sites in selective catalytic reduction of nitric oxide with ammonia over vanadia catalysts. [D] . Cai, Yeping. 1993

机译：在钒催化剂上用氨选择性催化还原一氧化氮的反应网络和催化部位的研究。
6. Effect of SO2 on the Selective Catalytic Reduction of NOx over V2O5-CeO2/TiO2-ZrO2 Catalysts [O] . Yaping Zhang, Peng Wu, Ke Zhuang, 2019

机译：SO2对V2O5-CeO2 / TiO2-ZrO2催化剂上NOx选择性催化还原的影响
7. Selective catalytic reduction of N2O with CH4 over Fe-zeolite catalysts : reaction mechanism and active site structure [O] . 信川健, ノブカワタケシ 2006

机译：Fe-沸石催化剂上CH 4选择性催化还原N 2 O的反应机理和活性中心结构

SELECTIVE CATALYTIC REDUCTION OF N_2O WITH CH_4 AND N_2O DECOMPOSITION OVER FE-ZEOLITE CATALYSTS

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