Synthesis and CO Conversion of CuMn2O4@GA Composite

doi:10.19894/j.issn.1000-0518.230225

Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (12): 1719-1725.DOI: 10.19894/j.issn.1000-0518.230225

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Synthesis and CO Conversion of CuMn₂O₄@GA Composite

Jun QIN¹(), Yu ZHANG¹, Zhi-Hui XIN¹, Xiao-Mei LI¹, Xiao ZHANG¹, Ting-Xuan YAN¹, Feng FENG², Yun-Feng BAI¹

^1.College of Chemistry and Chemical Engineering，Shanxi Datong University，Datong 037009，China
^2.Department of Energy Chemistry and Materials Engineering，Shanxi Institute of Energy，Taiyuan 030600，China

Received:2023-08-05 Accepted:2023-10-20 Published:2023-12-01 Online:2024-01-03
Contact: Jun QIN
About author:qj187@hotmail.com
Supported by:
the Science Foundation of Shanxi Datong University(2020YGZX009);the Graduate Education Reform Project(23JG06)

Abstract

Abstract:

Catalytic oxidation has been widely used in CO elimination. A single-dispersed porous microsphere catalyst CuMn₂O₄ and its graphene composite material CuMn₂O₄@GA are synthesized. The material structure is characterized by scanning electron microscopy （SEM）， X-ray diffraction （XRD） and other methods. The results show that the hydrothermal method is an ideal method for the synthesis of graphene composite. The structure of CuMn₂O₄@GA is stable and uniform， and the catalyst particles are fully dispersed in the aerogel. Catalytic performance test shows that the adsorption and the conversion behavior of CO on the surface of CuMn₂O₄ is closely related to its morphology. Benefiting from the low-density network structure of CuMn₂O₄@GA， complete conversion of CO is achieved at a high gas flow of 60000 mL/（g（cat）·h） and 128 ℃. The water of the inlet gas has no significant effect on the catalytic activity of CuMn₂O₄@GA. Multiple repeated activation and use test show that CuMn₂O₄@GA has good structural integrity and excellent economy.

Key words: Carbon monoxide conversion, CuMn₂O _x catalyst, Composite material, High gas flux

CLC Number:

O643

Jun QIN, Yu ZHANG, Zhi-Hui XIN, Xiao-Mei LI, Xiao ZHANG, Ting-Xuan YAN, Feng FENG, Yun-Feng BAI. Synthesis and CO Conversion of CuMn₂O₄@GA Composite[J]. Chinese Journal of Applied Chemistry, 2023, 40(12): 1719-1725.

Figures/Tables 5

Fig.1 Schematic presentation of CuMn2O4@GA synthesis and CO catalytic conversion

Fig.2 SEM results of DTUC1-2 （A， B）， HAADF （C， D） and EDX （E， F） of DTUC1-2， SEM of DTUC1-2@GA （G， H）， hydrogel （I） and aerogel （J） photograph of DTUC1@GA

Fig.3 Analysis of main elements of samples at different stages of material preparation （A）； Structural uniformity of DTUC1@GA （B）； XRD spectra of CuMn2O4@GA （C）； N2 adsorption/desorption isotherms， and pore distribution （D） of CuMn2O4@GA

Fig.4 CO conversion by DTUC1@GA under 120000 mL/（g（cat）·h）（A）， DTUC2@GA under 120000 mL/（g（cat）·h）（B）， DTUC1@GA under 60000 （C） and 240000 （D） mL/（g（cat）·h）， catalytic performance of DTUC1@GA in the presence of water （E）， and repeated test for DTUC1@GA （F）. In figure E and F， the temperature is 80 ℃ and the CO gas flow rate is 1.2 mL/min

Table 1 Comparison of catalytic conversion of CO by various CuMnO x

Catalyst（n（Cu）∶n（Mn）=1∶2）	m（CuMnO _x ）/mg	φ（CO）/% in feed	Space velocity/（mL·g^-1（cat）·h^-1）	T₁₀₀/℃	Ref.
CuMnO _x	100	2.5	36 000	180	［2］
CuO/2MnO₂	50	1	24 000	130	［3］
CuMnO _x	100	0.67	40 000	150	［14］
Mesoporous CuMnO _x	50	1	24 000	160	［15］
CuMnO _x	60	1	50 000	125	［16］
CuMn₂O₄@GA	500	0.4	60 000	128	This study

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Synthesis and CO Conversion of CuMn₂O₄@GA Composite

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