泡沫金属镍微型反应器内一氧化碳优先氧化

在微型反应器中,采用泡沫金属镍为载体负载Cu-Ce-Zr-O催化剂,用于优先氧化去除富氢气体中的CO。考察Zr掺杂量、焙烧温度和催化剂预处理工艺对催化剂性能的影响。结果表明,CuCe_9Zr_(1.5)O_δ催化剂表现出较好的催化性能,反应温度(160～260)℃,CO转化率达99%以上,出口气浓度降至100×10~(-6)以下,CO选择性维持在40%左右;反应温度(180～240)℃,富氢气体中CO浓度降至60×10~(-6)以下。经H_2预处理后的催化剂低温活性和反应性能略有提高。

Preferential oxidation of CO in hydrogen-rich stream in a metal foam micro-reactor

Cu-Ce-Zr-O catalysts were prepared by impregnation method and coated on matal foam nickel for CO preferential oxidation in H2-rich stream in a micro-reactor. The effects of Zr doping amount, calcination temperature and pretreatment methods of the catalyst on the performance of Cu-Ce-Zr-O catalysts were investigated. The results showed that CuCegZr1.5Oδ catalyst exhibited better catalytic properties; in reaction temperature range of （ 160 - 260） ℃, the outlet concentration of CO could be reduced to less than 100 × 10 ^-6, and CO conversion of over 99% and the selectivity to CO of about 40% were attained respectively ; CO concentration in the hydrogen-rich gas could be decreased to below 60 × 10^-6 in reaction temperature range of （180-240） ℃. The catalyst with hydrogen pretreatment had better performance and low temperature activity.