Development of Highly Efficient Cobalt-based Catalyst for Direct Decomposition of Nitrous Oxide

高效钴基一氧化二氮直接分解催化剂的研制

• 批准号: 19310050
• 负责人: INOUE Masashi
• 金额: $ 11.4万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19310050/
• 关键词: 環境保全技術; 一酸化二窒素; 触媒分解; 亜酸化窒素; 酸化コバルト; 環境触媒; 窒素酸化物; 地球温暖化ガス; アルカリプロモーター; 環境浄化; 過渡応答法; 笑気ガス; 脱硝反応; 硝酸製造プロセス; コバルト触媒; 表面酸素種; アルカリ修飾触媒

Alkali-doped Co_3O_4 catalysts were developed for direct decomposition of N_2O in the presence of O_2. The catalysts can be prepared by the precipitation method ; however, activity of the catalyst strongly depended on the crystal structure of the precipitate. It was found that the amount of alkali adsorbed on or occluded in the precursor determines the activity of the catalyst formed by calcination of the precursor. Effects of the alkali component on the catalyst activity was also examine and it was found that the alkali component facilitates the reduction of Co(III) species and thus facilitates the desorption of oxygen atoms formed by decomposition of N_2O. The effect of carbon dioxide in the feed gas upon the catalyst activity was examined, and it was found that CO_2 is strongly adsorbed on the catalyst and disturbs the activity of the catalyst.

碱掺杂Co3O4催化剂可用于N2O在O2存在下的直接分解。可采用沉淀法制备催化剂，但催化剂的活性强烈依赖于沉淀物的晶体结构。研究发现，前驱体上吸附或封闭的碱量决定了前驱体焙烧形成的催化剂的活性。考察了碱组分对催化剂活性的影响，发现碱组分有利于Co(III)物种的还原，从而有利于N2O分解生成的氧原子的脱附。考察了原料气中二氧化碳对催化剂活性的影响，发现二氧化碳在催化剂上有很强的吸附作用，对催化剂的活性有干扰作用。

项目成果

Direct Decomposition of NO on Ba Catalysts Supported on Ce-Fe Mixed Oxides

Ce-Fe 混合氧化物负载 Ba 催化剂上直接分解 NO

• 发表时间: 2010
• 期刊: Catal.Lett. 135
• 作者: Won-Jong Hong;Shinji Iwamoto;Masashi Inoue
• 通讯作者: Masashi Inoue

Optimized synthesis method for K/Co3O4 catalyst towards direct decomposition of N2O

• DOI: 10.1007/s10853-010-4818-4
• 发表时间: 2011-02
• 期刊: Journal of Materials Science
• 影响因子: 4.5
• 作者: Hiroaki Yoshino;C. Ohnishi;S. Hosokawa;K. Wada;M. Inoue

Direct decomposition of nitrous oxide in the presence of oxygen over iridium catalyst supported on alumina

• DOI: 10.1016/j.ces.2007.08.011
• 发表时间: 2008-10
• 期刊: Chemical Engineering Science
• 影响因子: 4.7
• 作者: C. Ohnishi;S. Iwamoto;M. Inoue

Kinetic Study of Direct Decomposition of Nitrous Oxide over K-Doped Co_3O_4 Catalyst

掺钾Co_3O_4催化剂上一氧化二氮直接分解动力学研究

• 发表时间: 2008
• 作者: C. H. Ohnishi;H. Yoshino;S. Imamura;S. Iwamoto;M. Inoue
• 通讯作者: M. Inoue

Direct Decomposition of Nitrous Oxide over a K-doped Co_3O_4 Catalyst in the Presence of Oxygen

氧气存在下一氧化二氮在 K 掺杂 Co_3O_4 催化剂上的直接分解

• 发表时间: 2008
• 作者: 原田千絵;吉野宏晃;Seiichiro Imamura;岩本伸司;井上正志
• 通讯作者: 井上正志