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Application of ce-uio-66 in the degradation of chlorinated aromatic hydrocarbons pops

A technology of ce-uio-66 and chlorinated aromatics, applied in the direction of catalyst carrier, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc., to achieve good stability, high catalytic efficiency and low energy consumption low effect

Active Publication Date: 2021-04-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on MOFs as low-temperature thermal catalysts, and the application of Ce doped in UiO-66 framework to low-temperature catalytic degradation of chlorinated aromatic hydrocarbons POPs has not been reported.

Method used

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  • Application of ce-uio-66 in the degradation of chlorinated aromatic hydrocarbons pops
  • Application of ce-uio-66 in the degradation of chlorinated aromatic hydrocarbons pops
  • Application of ce-uio-66 in the degradation of chlorinated aromatic hydrocarbons pops

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0028] Mix and dissolve raw materials cerium chloride, zirconium chloride, and terephthalic acid in a molar ratio of 0.10:0.90:1.0 in 30 mL of N,N-dimethylformamide, wherein the concentration of terephthalic acid is 0.133 mol / L, and set In a pressure vessel lined with polytetrafluoroethylene, heat up to 120°C for 36 hours after sealing, then cool naturally, filter, wash with N,N-dimethylformamide and methanol three times, and dry to obtain white Powder, that is, the organo-metallic framework Ce 0.1 -UiO-66. The XRD pattern of the obtained sample is shown in figure 1 shown in .

Embodiment 1

[0030] Grind the catalyst obtained in Preparation Example 1, mix 50 mg of it with 2 mg of hexachlorobenzene, place it in a closed tube, and react at 250° C. for 60 min. The residue after the reaction was extracted with n-hexane, and the obtained extract was detected and analyzed by GC-ECD to calculate the degradation efficiency. Through analysis and calculation, the degradation efficiency of Preparation Example 1 is 99.0%.

Embodiment 2

[0032] Adopt the same preparation example 1 process to prepare organo-metal framework Ce 0.20 - UiO-66, the prepared catalyst was ground, 50 mg of it was mixed with 2 mg of hexachlorobenzene and placed in a closed tube, and reacted at 250° C. for 60 min. The residue after the reaction was extracted with n-hexane, and the obtained extract was detected and analyzed by GC-ECD to calculate the degradation efficiency. Through analysis and calculation, the degradation efficiency of Preparation Example 1 is 98.5%.

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Abstract

The invention discloses the application of an organic-metal frame material Ce-UiO-66 in degrading chlorinated aromatic hydrocarbon persistent organic pollutants (POPs). MOF materials have a large specific surface area and porous properties, and can be used as a carrier to support metal components, which improves the dispersion of metals, which is conducive to improving the activity of catalysts. The main active component is Ce, and the specific surface area of ​​the catalyst is 1000-1200m 2 / g, microporous structure. The organic-metal framework material Ce-UiO-66 of the present invention can efficiently catalyze and degrade chlorinated aromatic hydrocarbon POPs at low temperature. The preparation condition of the present invention is easy to control, the environment is friendly, the process is simple, and the operability is good. The obtained material has the characteristics of high catalytic efficiency, low energy consumption, good stability and no secondary pollution.

Description

technical field [0001] The invention relates to an organic-metal frame material Ce-UiO-66 catalyst for low-temperature catalytic degradation of chlorinated aromatic hydrocarbon POPs. [0002] The present invention also relates to the preparation method of the above-mentioned Ce-UiO-66 catalyst. [0003] The invention also relates to a method for catalytically degrading chlorinated aromatic hydrocarbon POPs at low temperature with the above-mentioned organic-metal framework material Ce-UiO-66 catalyst. Background technique [0004] Persistent Organic Pollutants (POPs) are a class of semi-volatile substances with long-term persistence, bioaccumulation, carcinogenicity, teratogenicity, and mutagenicity, which are difficult to degrade in the natural environment. , so it poses a serious threat to human health and the ecological environment, which has attracted the attention of governments and scientific research institutions. Many chlorinated aromatic hydrocarbons are persisten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J35/10B01J32/00C02F1/72C02F101/36
Inventor 樊芸张海军陈吉平张亦弛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI