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Low-temperature combustion of methane using PdO/Al2O3 catalyst: Influence of crystalline phase of Al2O3 support

机译:使用PdO / Al2O3催化剂进行甲烷的低温燃烧:Al2O3载体的晶相的影响

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摘要

Palladium oxide (PdO) catalysts supported on various alumina supports (θ-, δ-,κ-,η-, and γ-Al2O3) were prepared and the effect of the crystalline phases of the supports on the catalytic performance in methane combustion was investigated. Among the catalysts examined, the PdO/8-Al2O3 catalyst, which showed the lowest reduction temperature in the temperature-programmed reduction of methane and the highest oxygen capacity in methane pulse experiments, exhibited the highest CH4 conversion and stability for methane combustion. However, all the catalysts were deactivated because of the growth of PdO particles and strong adsorption of water vapor.
机译:制备了负载在各种氧化铝载体(θ-,δ-,κ-,η-和γ-Al2O3)上的氧化钯(PdO)催化剂,并研究了载体的晶相对甲烷燃烧催化性能的影响。在所考察的催化剂中,PdO / 8-Al2O3催化剂在甲烷的程序升温还原中显示出最低的还原温度,在甲烷脉冲实验中显示出最高的氧容量,显示出最高的CH4转化率和甲烷燃烧稳定性。但是,由于PdO颗粒的生长和水蒸气的强吸附性,所有催化剂均失活。

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