Catalysts for Low-temperature Methane Oxidation

低温甲烷氧化催化剂

• 批准号: 12650779
• 负责人: SASAKI Kazunari
• 金额: $ 2.24万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650779/
• 关键词: combustion catalysis; Palladium; SnO2; low-temperature oxidation; deactivation; methane oxidation

The activity for low-temperature methane oxidation over oxide-supported catalysts such as Pd/Al_2O_3, Pd/SnO_2, and Pd/Al_2O_3-36NiO was investigated. It was found that Pd/Al_2O_3 was deactivated most significantly due to water vapor, and that Pd/Al_2O_3-36NiO was most insensitive to water vapor. The catalytic activity of Pd/Al_2O_3 decreased monotonically as water vapor concentration increased, whereas Pd/SnO_2 and Pd/Al_2O_3-36NiO showed almost constant activity under higher water vapor concentrations.The catalytic activity at high steam concentration was in the following order: Pd/SnO_2 >Pd/Al_2O_3-36NiO > Pd/Al_2O_3. Kinetic analysis with methane adsorption as the rate-limiting step was applied to evaluate the water inhibiting effect. Pd/Al_2O_3 displayed the most negative value of the enthalpy of water adsorption, while Pd/SnO_2 and Pd/Al_2O_3-36NiO exhibited similar water adsorption enthalpy.

研究了诸如PD/AL_2O_3，PD/SNO_2和PD/AL_2O_3-36NIO之类的氧化催化剂上低温甲烷氧化的活性。发现PD/AL_2O_3由于水蒸气而被取消最大，并且PD/AL_2O_3-36NIO对水蒸气最不敏感。 The catalytic activity of Pd/Al_2O_3 decreased monotonically as water vapor concentration increased, whereas Pd/SnO_2 and Pd/Al_2O_3-36NiO showed almost constant activity under higher water vapor concentrations.The catalytic activity at high steam concentration was in the following order: Pd/SnO_2 >Pd/Al_2O_3-36NiO > Pd/Al_2O_3.将甲烷吸附的动力学分析作为限制步骤，以评估抑制水作用。 pd/al_2o_3显示了水吸附焓的最负值，而pd/sno_2和pd/al_2o_3-36nio显示出类似的水吸附焓。

项目成果

R.Kikuchi, S.Maeda, K.Sasaki, S.Wennerstrom, K.Eguchi: "Low-temperature methane oxidation over oxide-supported Pd catalysts : inhibitory effect of water vapor"Applied Catalysts A : General. 232・(1-2). 23-28 (2002)

R.Kikuchi、S.Maeda、K.Sasaki、S.Wennerstrom、K.Eguchi：“氧化物负载 Pd 催化剂上的低温甲烷氧化：水蒸气的抑制作用”应用催化剂 A ：一般。 2). 23-28 (2002)。

R.Kikuchi, S.Maeda, K.Sasaki, S.Wennerstrom, K.Eguchi: "Low-temperature methane oxidation over oxide-supported Pd catalysts : inhibitory effect of water vapor"Applied Catalysts A : General. 232. 23-28 (2002)

R.Kikuchi、S.Maeda、K.Sasaki、S.Wennerstrom、K.Eguchi：“氧化物负载 Pd 催化剂上的低温甲烷氧化：水蒸气的抑制作用”应用催化剂 A：概述。

R. Kikuchi, S. Maeda, K. Sasaki, S. Wennerstrom, K. Eguchi: "Low-temperature methane oxidation over oxide-supported Pd catalysts: inhibitory effect of water vapor"Applied Catalysts A: General. 232 (1-2). 23-28 (2002)

R. Kikuchi、S. Maeda、K. Sasaki、S. Wennerstrom、K. Eguchi：“氧化物负载 Pd 催化剂上的低温甲烷氧化：水蒸气的抑制作用”应用催化剂 A：概述。