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Catalyst for catalytic wet oxidation degradation of humic substances and preparation method thereof

A technology for catalyzing wet oxidation and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The problem of high catalyst cost can achieve the effect of large porosity, obvious adsorption and good dispersion.

Inactive Publication Date: 2020-08-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous catalysts have high activity and high selectivity, but have the disadvantages of being difficult to separate from the reaction system and difficult to reuse
Therefore, the cost of the catalyst is high, which is not conducive to large-scale industrial application

Method used

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  • Catalyst for catalytic wet oxidation degradation of humic substances and preparation method thereof
  • Catalyst for catalytic wet oxidation degradation of humic substances and preparation method thereof
  • Catalyst for catalytic wet oxidation degradation of humic substances and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1 catalyst preparation

[0066] 1. Mix 1.6 g of Pluronic F-127 granules, 2 mL of hydrochloric acid (37.5%, HCl), 2.3 mL of glacial acetic acid (HAc), and 3.6 mL of zirconium butoxide (C 16 h 36 o 4 Zr, MW=383.08 g / mol) was dissolved in 30 mL ethanol in turn.

[0067] 2. After the mixture is fully dissolved, stir on a heating plate at 35 °C at 500 rpm for 2 hours, then add 870 μL of 1 g / mL nickel(II) nitrate (Ni(NO 3 ) 2 ) solution, based on preliminary experiments and calculations, the molar ratio of nickel to zirconium is 30:100, and the corresponding metal nickel loading is 12.3wt%, and the solution is continuously stirred for 12 hours.

[0068] 3. Then the sol solution is evenly spread to the inner surface layer of a petri dish with a diameter of 12.5 cm, and placed on a heating plate in a fume hood to quickly and stably evaporate the solvent, the relative humidity is controlled at 50%, and the temperature Control at 40 °C to ensure rapid evaporation ...

Embodiment 2

[0072] Example 2 Catalyst Preparation

[0073] Prepare the flow process of catalyst by the same sol-gel method in embodiment 1, add 2312.3 mg zirconium oxynitrate (IV) (ZrO(NO 3 ) 2 • xH 2 O) As the precursor of the supported material zirconia, Ni / ZrO with a Ni loading of 12.3 wt% was prepared 2 Catalyst, prepared catalyst is recorded as Ni / ZrO 2 -O.

Embodiment 3

[0074] Example 3 catalyst preparation

[0075] Prepare the flow process of catalyst by the same sol-gel method among the embodiment 1, add the ZrO of 1232.2 mg 2 The powder was used as the precursor of the loading material zirconia to prepare Ni / ZrO with a Ni loading of 12.3wt% 2 Catalyst, prepared catalyst is recorded as Ni / ZrO 2 -P.

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Abstract

The invention discloses a catalyst for degrading humus by catalytic wet oxidation and a preparation method thereof. The catalyst disclosed by the invention is a Ni / ZrO2 mesoporous catalyst prepared byadopting a sol-gel method, wherein a metal nickel atom is used as an active metal component and mesoporous zirconium dioxide is used as a loading material. The catalyst has a large specific surface area and can have a relatively large contact area with reactants; the catalyst has great porosity and a remarkable adsorption effect on the reactants; the active metal component has good dispersity andstill has good catalytic activity in low-temperature catalytic wet oxidation reaction; the catalyst has good stability, low active metal extracting and lasting service life. The catalyst disclosed bythe invention is applicable to treatment of various wastewater containing humus pollutants, such as treatment of fulvic acid wastewater, humic acid wastewater, anaerobic digestion wastewater and landfill leachate and has a great industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of degrading humic substances, and more specifically relates to a catalyst for catalyzing wet oxidation and degrading humic substances and a preparation method thereof. Background technique [0002] Humic Substances (hereinafter referred to as HS) is a kind of complex and stable organic polymer mixture, the relative molecular mass can generally range from hundreds to millions, and widely exists in soil, natural water and other environments. According to the solubility of humic substances in acid-base solutions, they can be divided into three categories, namely: humic acid (Humic Acid, hereinafter referred to as HA) which is soluble in water under the condition of pH value greater than 2; Both water-soluble fulvic acid (Fulvic Acid, hereinafter referred to as FA) and water-insoluble humin. Generally speaking, water-soluble HS mainly refers to HA and FA. HS is difficult to be biodegraded in the process of na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C02F1/72C02F101/30
CPCB01J23/755C02F1/725C02F2101/30
Inventor 何超葛超锋林恒亮李传浩熊亚
Owner SUN YAT SEN UNIV
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