A kind of monolithic ruthenium catalyst for PTA oxidation tail gas purification, preparation method and use thereof

A ruthenium catalyst, a technology for oxidizing tail gas, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Halogen poisoning and other problems, to achieve the effect of high activity, low cost and stable catalytic performance

Active Publication Date: 2018-01-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] One of the purposes of the present invention is to provide a monolithic ruthenium catalyst for PTA oxidation tail gas purification in view of the problems of high cost, poor toxicity resistance and high halogenated by-products currently used for industrial waste gas treatment. The catalyst has the advantages of relatively low cost, high catalytic activity, resistance to halogen poisoning, and less high-halogenated by-products.

Method used

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  • A kind of monolithic ruthenium catalyst for PTA oxidation tail gas purification, preparation method and use thereof
  • A kind of monolithic ruthenium catalyst for PTA oxidation tail gas purification, preparation method and use thereof

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Effect test

Embodiment 1

[0045] A catalyst for catalyzing and oxidizing PTA waste gas is mainly divided into two processes: powder catalyst preparation and integral catalyst preparation. Wherein, the powder catalyst includes an active component, a first support and a second support, the active component is ruthenium, and the first support is rutile phase TiO 2 , the second carrier is ZrO 2 , based on 100 wt% of the mass of the powder catalyst, the mass percentage of ruthenium in the active component of the powder catalyst is 1 wt%, and the mass ratio of the first carrier to the second carrier is 5:1. In the monolithic catalyst, the catalyst coating amount was 160 g / L.

[0046] Above-mentioned catalyst preparation comprises the steps:

[0047] (1) The rutile phase TiO 2 Add it into the aqueous solution of zirconium nitrate and stir it at the same time to obtain a mixed slurry, then let it stand for 1 hour, after the impregnation is sufficient, place it in an oven at 110°C to remove water for the fir...

Embodiment 2

[0052] Except that the mass percentage of the active component ruthenium element in the catalyst is 0.2wt.%, the rest is the same as that of Example 1.

[0053] The complete oxidation temperatures of the catalyst p-bromomethane, acetic acid, methyl acetate, and p-xylene are 320°C, 235°C, 240°C, and 260°C, respectively. 2 Selectivity ≥ 99%.

Embodiment 3

[0055] Except that the mass percentage of the active component ruthenium element in the catalyst is 2wt.%, the rest is the same as that of Example 1.

[0056] The complete oxidation temperatures of the catalyst p-bromomethane, acetic acid, methyl acetate, and p-xylene are 235°C, 170°C, 190°C, and 220°C, respectively. 2 Selectivity ≥ 99%.

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Abstract

The invention relates to a monolithic ruthenium catalyst for purifying PTA oxidation tail gas, a preparation method and application thereof. The catalyst is mainly obtained by forming a powder catalyst, the powder catalyst includes an active component, a first carrier and a second carrier, the active component is ruthenium and / or ruthenium oxide, the first carrier is rutile phase TiO2, The second carrier is any one of ZrO2, Al2O3, SiO2 or ZnO, and the mass percentage of ruthenium in the active component in the powder catalyst is ≤2wt% based on the mass of the powder catalyst as 100 wt%. The catalyst has high activity, stable catalytic performance for brominated hydrocarbons, and no high-brominated by-products are formed. For common components in PTA tail gas, the complete oxidation temperature of the catalyst is 170-230 °C, and the selectivity of the final product CO2 is ≥99. %, can be widely used in catalytic oxidation of industrial organic waste gas such as PTA oxidation tail gas.

Description

technical field [0001] The invention relates to a monolithic ruthenium catalyst for purification of PTA oxidation tail gas, a preparation method and its use, and belongs to the technical field of environmental protection. The catalyst uses ruthenium and / or ruthenium oxide as the main active component, which can efficiently remove Remove VOCs in PTA oxidation tail gas. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, referred to as VOCs) are of various types, common ones include hydrocarbon compounds, oxygen-containing organic compounds, nitrogen-containing, sulfur-containing, halogen-containing and phosphorus-containing organic compounds, etc. pollutants. The hazards of VOCs are particularly serious. Long-term exposure to VOCs-polluted environments can cause chronic poisoning and damage the liver and nervous system. [0003] Purified Terephthalic Acid (PTA) oxidation waste gas is an organic waste gas containing various pollutants discha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/60B01D53/86B01D53/72B01D53/70B01D53/62
Inventor 朱廷钰刘霄龙王健曾俊淋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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