A kind of preparation method of supported metal cluster catalyst

A catalyst and metal cluster technology, which is applied in the field of preparation of supported metal cluster catalysts, can solve unseen problems, and achieve the effects of reducing economic costs and facilitating catalysis research.

Active Publication Date: 2017-04-12
KUNMING UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, regarding the improvement of Fe 2 (CO) 9 , Fe 3 (CO) 12 There is no relevant report on the stability of carbonyl iron at normal temperature and pressure.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of supported metal cluster catalyst
  • A kind of preparation method of supported metal cluster catalyst
  • A kind of preparation method of supported metal cluster catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Take 40-60 mesh activated carbon and wash it with deionized water 4 times until the supernatant has no turbid suspension and the pH value does not change, and dry it at 100°C for 8 hours to obtain the pretreated activated carbon;

[0024] (2) Fe 2 (CO) 9 Dissolved in an organic solvent, impregnated the pretreated activated carbon in Fe 2 (CO) 9 solution, wherein the mass ratio of activated carbon to iron carbonyl is 10:1, and the immersion time is 8h;

[0025] (3) After the organic solvent is removed at 60°C by a vacuum instrument, the temperature is raised to 180°C, and the air pressure is adjusted to 2Pa to remove CO;

[0026] (4) After introducing hydrogen for reduction for 6 hours, when the hydrogen is pumped out to 1Pa, CO is re-adsorbed under this pressure to obtain the supported Fe 2 (CO) 9 catalyst.

[0027] The loaded Fe prepared in this example 2 (CO) 9 When the catalyst is used to remove carbonyl sulfide in the yellow phosphorus tail gas, the cata...

Embodiment 2

[0033] (1) Take 40-60 mesh activated carbon and wash it with deionized water for 5 times until the supernatant has no turbid suspension and the pH value does not change, and dry it at 105°C for 7.5 hours to obtain the pretreated activated carbon;

[0034] (2) Fe 2 (CO) 9 Dissolved in an organic solvent, impregnated the pretreated activated carbon in Fe 2 (CO) 9 solution, wherein the mass ratio of activated carbon to iron carbonyl is 10:2, and the soaking time is 10h;

[0035] (3) After the organic solvent is removed by a vacuum instrument at 55°C, the temperature is raised to 200°C, and the air pressure is adjusted to 2.5Pa to remove CO;

[0036] (4) After 6.2 hours of reduction with hydrogen, when the hydrogen is pumped out to 1.2Pa, CO is re-adsorbed under this pressure to obtain the supported Fe 2 (CO) 9 catalyst.

[0037] The loaded Fe prepared in this example 2 (CO) 9 When the catalyst is used to remove carbonyl sulfide in the yellow phosphorus tail gas, the catal...

Embodiment 3

[0041] (1) Take 40-60 mesh activated carbon and wash it with deionized water for 6 times until the supernatant has no turbid suspension and the pH value does not change, and dry it at 110°C for 7 hours to obtain the pretreated activated carbon;

[0042] (2) Fe 2 (CO) 9 Dissolved in an organic solvent, impregnated the pretreated activated carbon in Fe 2 (CO) 9 In the solution, the mass ratio of activated carbon to carbonyl iron is 10:1.5, and the immersion time is 9h;

[0043] (3) After the organic solvent is removed at 40°C by a vacuum instrument, the temperature is raised to 210°C, and the air pressure is adjusted to 3Pa to remove CO;

[0044] (4) After 6.5 hours of reduction with hydrogen, when the hydrogen is pumped out to 1.8Pa, CO is re-adsorbed under this pressure to obtain a loaded Fe 2 (CO) 9 catalyst.

[0045] The loaded Fe prepared in this example 2 (CO) 9 When the catalyst is used to remove carbonyl sulfide in automobile exhaust, the catalyst is loaded in a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method for a supported metal cluster catalyst, belonging to the field of catalyst preparation. The preparation method comprises the following steps: dissolving carbonyl iron with an organic solvent, subjecting an n-pentane solution with dissolved carbonyl iron and active carbon to dipping in a vacuum instrument under the protection of nitrogen for 8 to 12 h and then removing the solvent under vacuum at a low temperature; in the vacuum instrument, allowing temperature to rise to 180 to 220 DEG C, regulating air pressure to 2 to 3 Pa and removing CO; and introducing hydrogen, carrying out reduction for 6 to 7 h, pumping out hydrogen until air pressure is 1 to 2 Pa and absorbing CO at the air pressure so as to obtain the target catalyst. According to the invention, strong interaction between carbonyl iron and a supporter is utilized, so the structure of carbonyl iron is more stable, and the problem that carbonyl iron is hard to preserve at normal temperature and normal pressure is overcome; since no protective agent is added, physical and mental health of research personnel is guaranteed and economic cost for storage of the catalyst is reduced.

Description

technical field [0001] The invention relates to a preparation method of a supported metal cluster catalyst, which belongs to the field of catalyst preparation. Background technique [0002] With the continuous updating of synthesis methods, metal cluster nuclei have been widely used in the fields of organometallics and catalysis. Many unique properties have been discovered continuously, prompting the application of metal carbonyl compounds to be paid attention to. Moreover, because atomic cluster complexes can be used as new materials for catalysts, they can be used to develop new catalytic reactions, and show special catalytic activity. In recent years, their catalytic activity has received extensive attention. However, due to the instability of transition metal carbonyl complexes at room temperature and pressure, such as Fe 2 (CO) 9 , Fe 3 (CO) 12 Carbonyl iron is unstable in the air and will be gradually oxidized to iron oxide, which is volatile, toxic and harmful, w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J27/20B01D53/86B01D53/48
Inventor汤立红郭惠斌李凯宁平关清卿谷俊杰
OwnerKUNMING UNIV OF SCI & TECH