期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 35, 期 1, 页码 110-117出版社
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-017-0278-8
关键词
CO2 Hydrogenation; Methanol Synthesis; Solid Phase Grinding; Oxalic Acid; In Situ Reduction
资金
- National Natural Science Foundation of China [21528302, 51572272]
- Zhejiang Provincial Natural Science Foundation of China [LY14B030004]
- Science and Technology Department of Zhejiang Province [2017C33007]
- Scientific Research Foundation of the Education Department of Zhejiang Province [Y201635167]
- Open Foundation of Zhejiang Provincial Key Lab. for Chem. & Bio. Processing Technology of Farm Products
- Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing [2016KF0009, 2016KF0008]
- K.C. Wong Magna Fund in Ningbo University
Reduced Cu/ZnO catalyst was synthesized through solid phase grinding of the mixture of oxalic acid, copper nitrate and zinc nitrate, followed by subsequent calcination in N-2 atmosphere without further H-2 reduction. The catalysts were characterized by various techniques, such as XRD, TG-DTA, TPR and N2O chemisorption. Characterization results suggested that during the calcination in N-2, as-ground precursor (oxalate complexes) decomposed to CuO and ZnO, releasing considerable amount of CO, which could be used for in situ reduction of CuO to Cu-o. The in situ reduced O/I-Cu/ZnO catalyst was evaluated in CO2 hydrogenation to methanol, which exhibited superior catalytic performance to its counterpart O/H-Cu/ZnO catalyst obtained through conventional H-2 reduction. The decomposition of precursor and reduction of CuO happened simultaneously during the calcination in N-2, preventing the growth of active Cu-0 species and aggregation of catalyst particles, which was inevitable during conventional H-2 reduction process. This method is simple and solvent-free, opening a new route to prepare metallic catalysts without further reduction.
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