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- W2348976013 abstract "Ultrafine Cu/ZnO/TiO_2-SiO_2 catalysts with different content of Cu and Zn ranging from 5% to 25% were prepared by sol-gel method. The physical-chemical properties and catalytic performance of the catalysts were studied by using FT-IR(Fourier Transform InfraRed), BET,TPR(Temperature Programmed Reaction),XRD(X-ray Diffraction) and micro-reactor system. It was found that the catalysts exhibited large BET surface area(590?m~2g~(-1)～240?m~2g~(-1)) and uniform pore distribution. XRD showed that only crystal phase detected was CuO. With increasing content of Cu and Zn in the sample, the BET surface area of the catalysts gradually decreased, the average pore diameter and the junction temperature of CuO micro-crystal increased, the dimensions of the micro-crystal increased from 10?nm to 20?nm. The presence of ZnO can promote the interaction of CuO and TiO_2-SiO_2 support. The catalysts showed high activity and selectivity to methanol. When the content of CuO and ZnO both were 25%, a methanol yield of 0.126/g·h~(-1)·g~(-1)_(cat) was obtained under the conditions of 260?℃, 2.0?MPa, 2?500?h~(-1) with a CO_2/H_2 ratio of 1/3." @default.
- W2348976013 created "2016-06-24" @default.
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- W2348976013 date "2004-01-01" @default.
- W2348976013 modified "2023-09-23" @default.
- W2348976013 title "Characterization and catalytic activity evaluation of ultrafine Cu/ZnO/TiO_2-SiO_2 catalysts for CO_2 hydrogenation to methanol" @default.
- W2348976013 hasPublicationYear "2004" @default.
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