Water-gas shift reaction over Cu–Zn, Cu–Fe, and Cu–Zn–Fe composite-oxide catalysts prepared by urea-nitrate combustion

Thouchprasitchai, Nutthavich; Luengnaruemitchai, Apanee; Pongstabodee, Sangobtip

doi:10.1016/j.jiec.2013.01.012

Cited by 20 publications

(12 citation statements)

References 40 publications

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“…Similar trends were observed for the dependence of the CO consumption rate and Cu 0 surface areas on the CuO/CuAl 2 O 4 ratios (Figure 9), showing a strong positive correlation between the Cu 0 surface area and the WGS reaction rate. The CO consumption rate was calculated using the following These results (Figure 9) further support the conclusions of earlier studies that Cu 0 is the active surface site responsible for the WGS activity of Cu−Pd/γ-Al 2 O 3 catalysts, as it is the proposed WGS active sites of Cu−Ni/Al 2 O 3 , 22 Cu−Fe/ Al 2 O 3 , 48 Cu−ZnO/Al 2 O 3 , 49 and Cu−MgO/Al 2 O 3 . 50 The volcano plots shown in Figure 9 suggest that CuAl 2 O 4 formation may result in an additional Cu 0 surface area for up to the molar CuO/CuAl 2 O 4 = 2.37 (CuPd2), but excessive CuAl 2 O 4 formation reduced Cu 0 surface area and therefore the WGS activity.…”

Section: Resultssupporting

confidence: 80%

Novel Bimetallic Cu–Pd Nanoparticles as Highly Active Low-Temperature WGS Catalysts

Yun

Guliants

2020

Ind. Eng. Chem. Res.

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Water gas shift (WGS) reaction is a key industrial process to produce hydrogen from CO and H2O. However, conventional Cu-based WGS catalysts are easily deactivated by sulfur compounds, which are ubiquitous in syngas. Cu–Pd nanoparticles of size 8–10 nm were synthesized as a function of the Cu/Pd ratios and investigated as promising sulfur-tolerant WGS catalysts. Significant improvement in the WGS activity was observed in the Cu–Pd catalysts after calcination at 800 °C in air. Pd addition enhanced the reducibility of CuO and Cu0 dispersion and limited the formation of CuAl2O4 spinel during calcination at 800 °C. The additional reducible and catalytically active CuO species was generated by the Cu migration from the CuO shell covering the Cu–Pd nanoparticles onto the γ-Al2O3 support during the 800 °C calcination. The optimal Cu–Pd catalyst characterized by the CuO/CuAl2O4 ratio of 2.37 showed the highest WGS activity, thermal stability, and sulfur tolerance among all Cu-based catalysts reported in this study.

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Section: Resultssupporting

confidence: 80%

Novel Bimetallic Cu–Pd Nanoparticles as Highly Active Low-Temperature WGS Catalysts

Yun

Guliants

2020

Ind. Eng. Chem. Res.

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“…In recent years, there has been a renewed interest in the WGS reaction due to the tremendous growth in fuel cell technology and the need to develop small-scale fuel processors [5,6]. However, conventional high temperature (Fe 3 O 4 /Cr 2 O 3 ) and low temperature (Cu/ZnO/ Al 2 O 3 ) WGS catalysts cannot be used in those applications and thereby many researches are focused on the development of active, stable, and cost effective WGS catalysts [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Comparative study on cubic and tetragonal Cu–CeO2–ZrO2 catalysts for water gas shift reaction

Jeong

Jang

et al. 2015

Journal of Industrial and Engineering Chemistry

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“…1) is known as a prominent reaction with various uses in ammonia synthesis, pure hydrogen production, and recently fuel-cell technology [1][2][3][4][5][6][7][8][9][10][11][12]. This reaction is usually run in two steps: a high-temperature shift (HTS, 350-500°C, over Fe-Cr-based catalysts) [13][14][15] and a low-temperature shift (LTS, 150-300°C, over Cu-Zn-based catalysts) [5,13].…”

Section: Introductionmentioning

confidence: 99%

Effect of synthesis method on physicochemical and catalytic properties of Cu–Zn-based mesoporous nanocatalysts for water-gas shift reaction

Salehirad

Latifi

2016

Res Chem Intermed

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Two new mesoporous nanocatalysts based on CuO-ZnO/MgO were synthesized by using a modified liquid-phase method. Due to use of this method, the nanocatalysts contained an efficient ZnO/MgO phase in which MgO is incorporated into ZnO phase. The structural and catalytic properties of the nanocatalysts in the water-gas shift reaction were investigated compared with samples prepared by conventional sol-gel and liquid-phase methods as references, as well as a commercial catalyst. The results reveal that the new nanocatalysts exhibited higher surface area, lower degree of agglomeration, and higher activity than the reference samples, indicating the influence of both the synthesis method and phase composition.

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Water-gas shift reaction over Cu–Zn, Cu–Fe, and Cu–Zn–Fe composite-oxide catalysts prepared by urea-nitrate combustion

Cited by 20 publications

References 40 publications

Novel Bimetallic Cu–Pd Nanoparticles as Highly Active Low-Temperature WGS Catalysts

Novel Bimetallic Cu–Pd Nanoparticles as Highly Active Low-Temperature WGS Catalysts

Comparative study on cubic and tetragonal Cu–CeO2–ZrO2 catalysts for water gas shift reaction

Effect of synthesis method on physicochemical and catalytic properties of Cu–Zn-based mesoporous nanocatalysts for water-gas shift reaction

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