Selective Catalytic Realaction of Nitric Oxide with Hydrocarbons in Oxygen-rich Atmosphere

富氧气氛中一氧化氮与碳氢化合物的选择性催化反应

• 批准号: 04453083
• 负责人: KIKUCHI Eiichi
• 金额: $ 5.06万
• 依托单位: Waseda University.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04453083/
• 关键词: Nitric oxide; Nitrogen dioxide; Selective reduction; Zeolite; Gallium; Iudium; Methane; Reaction mechanism; 炭化水素; エタン; プロパン

Selective reduction of No by CH_4 on zeolite catalysts has been studied. After investigation on the catalytic features of various cation-exchaged zeolites, we found that Ga-ZSM-5 and In-ZSM-5 were highly active and selective for NO reduction by CH_4. We also showed that this reaction was moderately promoted even by H-form ZSM-5, mordenite, and ferrierite. From the catalytic performance of Ga-and In-ZSM-5in NO-CH_4-O_2, NO_2-CH_4-O_2, and NO-O_2 reactions, it is conuluded that the selective reduction of NO on these catalysts proceeds in two stages : (1) NO is oxidized to NO_2 on zeolite acid sites, (2) NO_2 and CH_4 react on gallium or indium sites. The highly selective features of Ga and In in zeolite for NO_2-CH_4 reaction seem to be attributed to the coordinatively unsaturated nature of these sites which adsorb both of these reactants on the same site. Effect of water vapor on NO conversion was also investigated. It was found that Ga-ZSM-5 was strongly inhibited by steam, while In-ZSM-5 was fairly active even in the presence of 10% steam.

已经研究了CH_4在沸石催化剂上选择性减少NO。在研究了各种阳离子脱落的沸石的催化特征后，我们发现GA-ZSM-5和IN-ZSM-5具有很高的活性和选择性，因此没有CH_4的降低。我们还表明，即使是H形ZSM-5，MordeNite和Ferriithite，也可以适度促进该反应。从ga和in-zsm-5 in no-ch_4-o_2，no_2-ch_4-o_2和no-o_2反应的催化性能中，可以证明，这些催化剂的选择性减少在两个阶段中进行的选择性减少了两个阶段：（1）在no_2 no_2 no _2 no_2 no_2 no_2 no_4 no_4 no_4 no_4 no_4 no_2 and ch_2和2）和2）（2）2）和2）（2）2）和2）。 NO_2-CH_4反应的GA和在沸石中的高度选择性特征似乎归因于这些位点的协调性不饱和性质，这些性质吸附了同一位点上这两个反应物。还研究了水蒸气对无转化的影响。发现GA-ZSM-5受到蒸汽的强烈抑制，而IN-ZSM-5在存在10％蒸汽的情况下也相当活跃。

项目成果

Katsunori Yogo: "Selective Reduction of Nitrogen Monoxide with Methane or Ethane on Gallium Ion-exchanged ZSM-5 in Oxgen rich Atmosphere" Chemistry Letters. 229-232 (1992)

Katsunori Yogo：“在富氧气氛中用镓离子交换 ZSM-5 选择性还原甲烷或乙烷”化学快报。

Katsunori YOGO: "Selective Reduction of Nitric Oxide by Methan on Zeolite Catalysts" Shokubai(Catalyst). 35(2). 126-129 (1993)

Katsunori YOGO：“甲烷在沸石催化剂上选择性还原一氧化氮”触媒（触媒）。

Katsunori YOGO: "Selective Reduction of NO with Propane on Gallium Ion-exchanged Zeolites" Chemistry Letters. 1025-1028 (1992)

Katsunori YOGO：“在镓离子交换沸石上用丙烷选择性还原 NO”化学快报。

K.Yogo, E.Kikuchi, M.Ihara, I.Terasaki, M.Umeno, and H.Watanabe: ""Selective Reduction of Nitric Oxide by Methane on Zeolite Catalysts"" Shokubai (Catalyst). 35. 126 (1993)

K.Yogo、E.Kikuchi、M.Ihara、I.Terasaki、M.Umeno 和 H.Watanabe：“沸石催化剂上甲烷选择性还原一氧化氮”Shokubai（催化剂）。

Katsunori YOGO: "Mechanism of Selective Catalytic Reduction of Nitric Oxide on Fe-Silicate in Oxygen-rich Atmosphere" ACS Symposium Series. (in press). (1994)

Katsunori YOGO：“富氧气氛中铁硅酸盐上一氧化氮的选择性催化还原机制”ACS 研讨会系列。