氧化釔、氧化釹及氧化釓對於銅鋅觸媒催化甲醇水蒸氣重組反應的影響

郭奐廷

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氧化釔、氧化釹及氧化釓對於銅鋅觸媒催化甲醇水蒸氣重組反應的影響

Effect of Y2O3, Nd2O3, and Gd2O3 on the steam reforming of methanol over Cu/ZnO catalysts

郭奐廷 , Ph.D　　Advisor：陳修維　　

繁體中文

氧化釹；甲醇水蒸氣重組反應；氧化釔；銅鋅觸媒；氧化釓； Nd2O3 ； Gd2O3 ； Y2O3 ； Cu/ZnO ； Steam reforming of methanol (SRM)

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Production of hydrogen (H2) by steam reforming of methanol (SRM) reaction has received much attention. This reaction can produce H2 gas in a high concentration that can be used for vehicles powered by fuel cells. In this study, the impregnation method was used to prepare Cu/ZnO catalysts, and the effect of additives,Y2O3, Nd2O3, or Gd2O3, to the catalysts on the H2 production, CO2 selectivity, and long-term stability of the SRM reaction were investigated. These catalysts were characterized using Brunauer–Emmett–Teller (BET) surface area analyzer, N2O dissociative adsorption method, temperature-programmed reduction (TPR) method, scanning electron microscopy, X-ray diffraction measurement, and X-ray photoelectron spectroscopy (XPS). The reaction kinetics analysis was performed by fitting with the power rate law and Langmuir–Hinshelwood rate expression. Finally, the Cu/ZnO catalysts were also prepared by the coprecipitation method, and the effect of the preparation method on the promoting effect of additives was investigated.
    All the additives could effectively increase the activity and CO2 selectivity of the catalyst prepared by the impregnation method. The effect of Nd2O3 was equal to that of Gd2O3 and superior to that of Y2O3 in terms of H2 production. The additives greatly increased the metallic surface areas of the catalysts. The results of the TPR and XPS analyses showed that the additives altered the chemical environment of the Cu species. The promoting mechanism of Y2O3 was not entirely the same as that of Nd2O3 and Gd2O3. Y2O3 mainly acted as a separator and improved the dispersion of Cu; however, it also affected the active sites of the catalyst to some extent. In comparison, Nd2O3 and Gd2O3 not only improved the dispersion of Cu but also affected the catalytic behavior of the active sites. 
    Kinetically, the additives increased the rate of the rate-determining step (RDS), with a concomitant decrease in the adsorption capacity of the catalyst toward the reactants. The optimum catalyst for the SRM process is likely to contain a moderate amount of one of the studies additives. The use of an excessive quantity of additive may result in a further increase in the rate of the RDS; however, this increase is likely to be offset by the decrease in the adsorption capacity of the catalysts for the reactants. 
    The results of the long-term stability experiments showed that all the additives greatly improved the stability of the Cu/ZnO catalysts. 4Y-10Cu/ZnO catalyst showed the best H2-production capability of 32.3% after 8 h, and 10Gd-10Cu/ZnO catalyst possessed the best stability of 60% after 8 h. 
    The promoting effects of Y2O3, Nd2O3, and Gd2O3 were also observed in the catalysts prepared by the coprecipitation method. These were mainly caused by decreasing the particle size of CuO and ZnO and increasing the dispersion of CuO in the catalysts.

Reference ( 84 ) 〈TOP〉

[3] Trimma DL, Önsanb ZI. Onbord fuel conversion for hydrogen-fuel-cell-driven vehicles. Catal Rev. (2001) 43,31-84.
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[4] Palo DR, Dagle RA, Holladay JD. Methanol steam reforming for hydrogen production. Chem Rev. (2007) 107,3992-4021.
連結：
[5] Lindstrom B, Pettersson LJ. Hydrogen generation by steam reforming of methanol over copper-based catalysts for fuel cell applications. Int J Hydrogen Energy. (2001) 26,923-33.
連結：
[6] Figueiredo RT, Martinez-Arias A, Granados ML, Fierro JLG. Spectroscopic evidence of Cu–Al interactions in Cu–Zn–Al mixed oxide catalysts used in CO hydrogenation. J Catal. (1998) 178,146-52.
連結：
[7] Huang X, Ma L, Wainwright MS. The influence of Cr, Zn and Co additives on the performance of skeletal copper catalysts for methanol synthesis and related reactions. Appl Catal A. (2004) 257,235-43.
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