DEVELOPMENT OF NOVEL SOLID SORBENTS FOR THERMAL SWING SORPTION AND DECOMPOSITION OF DILUTE NOX

稀氮氧化物热变吸附分解新型固体吸附剂的开发

• 批准号: 10555282
• 负责人: MACHIDA Masato
• 金额: $ 3.33万
• 依托单位: MIYAZAKI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555282/
• 关键词: NITROGEN OXIDES; ABSOROBENT; THERMAL SWING; METAL OXIDES; CATALYST; DECOMPOSITION; DENOX; SELECTIVE REDUCTION; 温度スウィング法; 還元; 気相固相反応

1. The NO sorption/desorption properties of substituted layered cuprates, LaィイD22-xィエD2SrィイD21+xィエD2CuィイD22ィエD2OィイD26ィエD2, have been studied to use them as an Nox storage material. The cumulative amount as well as the initial rate of NO uptake at 250℃ increased with Sr-substitution, x, giving rise to the maximum at x= 1.4, where a mixture of a orthorhombic layered cuprate and two binary oxides (SrィイD22ィエD2CuOィイD23ィエD2 and SrCuOィイD22ィエD2) was produced. The latter binary oxides should play a key role in promoting the oxidation of NO and thus solid-gas reactions with the layered cuprate phase, which is accompanied by the formation of nitrate and nitrite species. The absorbed NO was liberated reversibly when heated at 200-600℃. Sorption/desorption of NO could be cycled by employing temperature-swing operation.2. Sorption/desorption properties of Nox over ZrOィイD22ィエD2-based oxides are studied to use them as solid sorbents for NOx removal at low temperatures (<150℃), The impregnation of 1mol … More %PdO onto ZrOィイD22ィエD2 increased the NO uptake in the presence of OィイD22ィエD2 by promoting the oxidation of NO to NOィイD22ィエD2 and the subsequent formation of nitrate adsorbates. The reversible sorption/desorption cycles could be repeated even in the presence of COィイD22ィエD2 by applying temperature swing operation between 30 and 500℃.3. Interaction of NOィイD2xィエD2 with MnOィイD2xィエD2-CeOィイD22ィエD2 binary oxides are studied to use them for sorptive NOィイD2xィエD2 removal at low temperatures (<150℃), The formation of MnOィイD2xィエD2-CeOィイD22ィエD2 solid solutions with the fluorite-type structure at n≦0.5 was found to be quite effective in accelerating NOィイD2xィエD2. The cumulative NOィイD2xィエD2 uptake was increased by decreasing the reaction temperature and/or by increasing the OィイD22ィエD2 concentration, indicative of chemisorption via oxidation of NO/NOィイD22ィエD2. These adsorbates are produced by oxidative adsorption, which is caused by NO oxidation to NOィイD22ィエD2 by lattice oxygens bound to Mn and subsequent coordination to Ce in adjacent sites. Less

1. 研究了取代层状铜酸盐作为Nox储存材料的NO吸/解吸性能，随着Sr取代x的增加，250℃下NO的累积量和初始吸收率增加。在 x= 处达到最大值1.4，其中产生了斜方层状铜酸盐和两种二元氧化物（Sr-D22-D2-CuO-D23-D2 和 Sr-CuO-D22-D2）的混合物，后者二元氧化物应该在促进中发挥关键作用。 NO 的氧化，从而与层状铜酸盐相发生固气反应，同时形成硝酸盐和亚硝酸盐物质。在200-600℃加热时可逆地释放NO，通过变温操作可实现NOx的吸附/解吸循环。2．研究了ZrO2基氧化物对NOx的吸附/解吸性能。低温（<150℃）脱硝，将 1mol … 更多 %PdO 浸渍到ZrO D22 D2 通过促进 NO 氧化为 NO D22 D2 以及随后形成硝酸盐吸附物来增加 O D22 D2 存在下的 NO 吸收，即使在 CO2D22 存在下也可以通过施加温度来重复可逆吸附/解吸循环。 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3.研究了NOD2xD2与MnOD2xD2-CeOD22D2二元氧化物在低温（<150℃）下吸附去除NOD2xD2，在n≤0.5时形成具有萤石型结构的MnOD2xD2-CeOD22D2固溶体发现通过降低反应温度和/或增加 OD22 浓度（通过氧化 NO/NO-D22 进行化学吸附的指示剂）可非常有效地加速 NOD2xD2 的累积吸收。是由NO氧化引起的NOI D22 D2 通过晶格氧与 Mn 结合并随后与相邻位点的 Ce 配位。

项目成果

町田正人: "層状銅酸化物のNoxインターカレーションと応用" 表面. 36巻・7号. 147-155 (1998)

Masato Machida：“Nox 插层和层状铜氧化物的应用”Surface，第 36 卷，第 7 期，147-155 (1998)。

町田正人: "層状銅酸化物のNO_Xインターカレーションと応用"表面. 36巻・7号. 147-155 (1998)

Masato Machida：“NO_X 插层和层状铜氧化物的应用”Surface，第 36 卷，第 7 期，147-155 (1998)。

M.Machida: "Catalysis-Specialist Periodical Report 15巻"The Royal Society Chemistry(印刷中).

M. Machida：“催化专家定期报告第 15 卷”英国皇家学会化学（正在出版）。

M.Machida: "Absorption-Desorption Properties of Nitric Oxide over La_Sr_Cu_2O_6(0

M. Machida：“La_<2-x>Sr_<1+x>Cu_2O_6(0<x<2) 上一氧化氮的吸收-解吸特性”，材料化学杂志正在出版。

町田正人: "窒素酸化物固体吸収材料" エコインダストリー. 印刷中.

Masato Machida：“氮氧化物固体吸收材料”生态工业正在出版。