Preparation and Its Performance of Catalyst for CO Removal From Hydrogen Rich Gas Mixture

doi:10.12096/j.2096-4528.pgt.22014

Abstract

Abstract:

Alumina supports with different structures and properties were prepared by precipitating aluminum nitrate solution with different concentrations of ammonium carbonate solution, and then cobalt was loaded on them to obtain a catalyst for removing CO from hydrogen rich gas. The characterization and evaluation results show that the phase composition of alumina precursor can be simply and efficiently controlled and optimized, the structure, morphology, texture properties and pore size distribution of alumina can be adjusted, and thus the particle size, reduction, dispersion and surface chemical properties of loaded cobalt can be adjusted, by changing the concentration of ammonium carbonate. Finally, the catalytic performance of CO removal from hydrogen rich gas can be optimized, and the residual amount of CO is only 0.2 nmol/L, fully meeting the use requirements of Pt electrode fuel cell.

Key words: fuel cell, pore size distribution, cobalt particle size, CO removal, alumina, cobalt-based catalyst

CLC Number:

TK 09

Haiguang WANG, Yongfeng LIU, Jun ZHANG. Preparation and Its Performance of Catalyst for CO Removal From Hydrogen Rich Gas Mixture[J]. Power Generation Technology, 2022, 43(6): 901-907.

Figures/Tables 10

Fig. 1 XRD spectra of alumina precursors

Fig. 2 XRD spectra of alumina

Fig. 3 BJH pore distribution of alumina

Fig. 4 TEM images of alumina

Tab. 1 Texture parameters of alumina

样品	比表面积/(m²/g)	平均孔径/nm	孔体积/(cm³/g)
C-1.0	148.5	9.7	0.43
C-1.5	176.6	12.1	0.59
C-2.0	221.1	13.0	0.77

Fig. 5 XRD spectra of catalysts

Fig. 6 TEM images of catalysts

Tab. 2 Average particle sizes of Co3O4 and Co, and chemical adsorption results of H2

样品	Co₃O₄粒径/nm		H₂化学吸附结果		转化频率/(10^-3/s)
样品	d₁	d₂	d₃/nm	分散度/%	转化频率/(10^-3/s)
Cat-1.0	20.2	14.7	12.3	13.0	13.4
Cat-1.5	11.1	12.1	6.2	14.5	15.8
Cat-2.0	13.6	10.8	8.0	15.1	17.2

Fig. 7 H2-TPR curves of catalysts

Fig. 8 Catalytic performance for CO removal from hydrogen rich gas mixture

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