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La_（22-x）Cu_（22-x）D_2Sr_（21 +x）D_2Cu_（22-x）D_2O_（26-x）D_2作为NOx储存材料的吸脱附性能。在250℃时，随着Sr取代量x的增加，NO的累积吸收量和初始吸收速率均增加，在x= 1.4时达到最大值，此时生成了一种斜方晶系层状铜酸盐和两种二元氧化物（SrCu_（22）Cu_（23）Cu_（22）Cu_（23）D_2和SrCu_（22）Cu_（23）D_2）的混合物。后者的二元氧化物应发挥关键作用，促进NO的氧化，从而与层状铜酸盐相，这是伴随着硝酸盐和亚硝酸盐物种的形成的固-气反应。在200-600℃加热时，吸附的NO可逆释放。采用变温操作可以实现NO的吸附/脱附循环.研究了ZrO_（2-x）D_22/ZrO_（2-x）D_2基氧化物作为低温（<150℃）脱硝固体吸附剂对NOx的吸附/脱附性能。 ...更多信息 %PdO负载于ZrO_（22）O_（2在30 ~ 500℃的变温操作条件下，即使存在CO_（22）O_（22）本文研究了NO ↓ [2] D_2与MnO ↓ [2] D_2-CeO ↓ [2] D_2-CeO ↓ [2] D_2二元氧化物的相互作用，并将其用于低温（<150℃）吸附脱除NO ↓ [2] D_2。发现MnO ↓ [2] D_2-CeO ↓ [2] D_2-CeO ↓ [2] D_2固溶体在n = 0.5时形成的萤石型结构对NO ↓ [2] D_2-CeO ↓ [2] D_2的脱除有明显的促进作用。通过降低反应温度和/或通过增加NO/NO + D22 + D2浓度来增加累积的NO + D2 x + D2吸收，这表明通过NO/NO + D22 + D2的氧化进行化学吸附。这些吸附物是由氧化吸附产生的，这是由NO氧化成NO的氧化物D22的氧化物D2通过晶格氧结合到Mn和随后的配位到Ce在相邻的网站。少

项目成果

M.Machida: "Temperature-Swing Sorption/Desorption Cycles of Nitric Oxide through Intercalation by Double Layered Cuprate" Applied Catalysis B,Environmental. 17巻・3号. 195-203 (1998)

M. Machida：“通过双层铜酸盐插层实现一氧化氮的温度摆动吸附/解吸循环”，《应用催化 B》，《环境》第 17 卷，第 3 期。195-203 (1998)

町田正人: "窒素酸化物固体吸収材料"エコインダストリー. 12巻・4号. 5-12 (1999)

Masato Machida：“氮氧化物固体吸附材料” Eco Industry Vol. 12, No. 4. 5-12 (1999)

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)。

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_<2-x>Sr_<1+x>Cu_2O_6(0<x<2)" Journal of Materials Chemistry. 印刷中.

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。