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Catalyst for preparing methyl alcohol from syngas as well as preparation method and application of catalyst

A catalyst and methanol production technology, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of great influence, poor catalytic activity and stability, etc., so as to reduce the activation energy barrier, The effect of accelerating the catalytic reaction rate and improving the single-pass conversion rate of CO

Active Publication Date: 2014-10-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rh has a strong adsorption and activation ability for CO, but the catalyst prepared with Rh as the main active component to synthesize methanol is greatly affected by the carrier, and the catalytic activity and stability are not very good.

Method used

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  • Catalyst for preparing methyl alcohol from syngas as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 10ml C302 catalyst in the crucible, add an equal volume of 0.5mol / L Rh(NO 3 ) 3 Solution, soak for 12h, then dry at 100℃ for 12h, and roast at 350℃ for 4h to obtain CuO-Rh 2 O 3 / ZnO / Al 2 O 3 catalyst. In terms of metal elements, the composition molar ratio is Cu:Zn:Al:Rh=55.7:35.8:6.6:1.9.

[0022] The catalyst reduction and evaluation conditions are shown in Table 1, and the catalyst activity results are shown in Table 2.

Embodiment 2

[0024] Add 10ml of LG104 catalyst from Lurgi, Germany (CuO-V 2 O 5 / ZnO / Al 2 O 3 , In terms of metal elements, its composition molar ratio is Cu: Zn: Al: V = 55.4: 34.8: 4.3: 5.5) Put it in a crucible and add an equal volume of 0.4mol / L RhCl 3 Solution, immerse for 6h, then dry at 110℃ for 10h, and roast at 380℃ for 3h to obtain CuO-Rh 2 O 3 -V 2 O 5 / ZnO / Al 2 O 3 catalyst. In terms of metal elements, the composition molar ratio is Cu:Zn:Al:V:Rh=54.5:34.1:4.3:5.3:1.8.

[0025] The catalyst reduction and evaluation conditions are shown in Table 1, and the catalyst activity results are shown in Table 2.

Embodiment 3

[0027] Put 20ml of C301 catalyst from the Research Institute of Nanjing Chemical Industry Group of China (in terms of metal elements, its composition molar ratio is Cu:Zn:Al=62.5:31.2:6.3) into the crucible, and add an equal volume of 0.42mol / LRh(NO 3 ) 3 Solution, soak for 12h, then dry at 110℃ for 14h, and roast at 400℃ for 4h to obtain CuO-Rh 2 O 3 / ZnO / Al 2 O 3 catalyst. In terms of metal elements, the composition molar ratio is Cu:Zn:Al:Rh=62.0:30.9:6.3:0.8.

[0028] The catalyst reduction and evaluation conditions are shown in Table 1, and the catalyst activity results are shown in Table 2.

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Abstract

The invention relates to a catalyst for preparing methyl alcohol from syngas. The preparation method of the catalyst comprises the following steps: putting a CuO / ZnO / Al2O3 catalyst into a container, adding a rhodium salt solution with the same volume, immersing for 6-48 h, and then drying for 8-16 h at 80-120 DEG C; roasting the obtained product for 3-6 h at 300-400 DEG C to obtain the catalyst comprising 40-65 percent of Cu, 25-40 percent of Zn, 2-20 percent of Al and 0.1-0.2 percent of Rh in molar ratio. The catalyst has the advantages of high activity and good stability.

Description

Technical field [0001] The invention belongs to a preparation method and application of a catalyst, and specifically relates to a copper-rhodium-based catalyst for preparing methanol from synthesis gas, and a preparation method and application. Background technique [0002] Methanol is an important basic chemical raw material, and its downstream products are widely used in many fields such as chemical industry, pharmacy, and energy. The production of methanol from synthesis gas is one of the important ways for the efficient and clean utilization of coal. At present, the catalyst for methanol synthesis is mainly CuO / ZnO / Al 2 O 3 The catalyst, Cu as the active center, and ZnO as the carrier, play the role of dispersing Cu species and preventing Cu sintering and loss. At the same time, there is a synergistic effect between Cu and ZnO, which helps to form Cu-Zn active sites for methanol synthesis in the catalyst. . Al 2 O 3 It helps to improve the dispersion and specific surface ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C31/04C07C29/158
CPCY02P20/52
Inventor 章日光郑华艳
Owner TAIYUAN UNIV OF TECH
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