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Catalyst for efficiently and rapidly degrading HCHO at room temperature and preparation method thereof

A rapid degradation and catalyst technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of slow catalytic treatment rate, low HCOH emission concentration, difficult to release, etc., to avoid various difficulties and improve degradation. effect of speed

Pending Publication Date: 2021-12-03
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the generated H2O will be adsorbed on the active site, and it is difficult to release it in a short time, so that the activity decreases
Under this condition, the indoor HCOH emission concentration is low (<1ppm), the corresponding catalytic treatment rate is slow, and the utilization rate of the precious metal of the catalyst is not high

Method used

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  • Catalyst for efficiently and rapidly degrading HCHO at room temperature and preparation method thereof
  • Catalyst for efficiently and rapidly degrading HCHO at room temperature and preparation method thereof
  • Catalyst for efficiently and rapidly degrading HCHO at room temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method for efficient and fast degradation of HCHO catalyst at room temperature, comprising the steps of:

[0039] Preparation of TiO2-ZSM-5 honeycomb sphere carrier

[0040] (1) Take TiO according to the mass ratio of 0.6:0.3:0.1 2 , ZSM-5, aluminum glue, respectively 60 parts, 30 parts, 10 parts, after mixing, stir and record as cured product;

[0041] (2) Weigh 20 parts of citric acid, slowly drop into the above mixed solution, after adding, stir for 3 hours;

[0042] (3) Add 5 parts of tackifier, slowly drop into the above mixed solution, after adding, stir for 6 hours;

[0043] (4) Extrude into balls, use 25-mesh multi-mesh to make small balls, dry at 110°C*10h, pre-roast at 280°C*1h, and bake at 500°C*5h to form a honeycomb pellet carrier;

[0044] Preparation of Pt-Mn / TiO2-ZSM-5

[0045] (5) Weighing of materials: Weigh 0.2 parts of chloroplatinic acid, 10 parts of manganese acetate and 89.5 parts of TiO according to the mass ratio of 0.002:0.10:...

Embodiment 2

[0053] A room temperature efficient and fast degradation HCHO catalyst and its preparation, comprising the steps of:

[0054] Preparation of TiO2-ZSM-5 honeycomb sphere carrier

[0055] (1) Take TiO2, ZSM-5, and aluminum glue according to the mass ratio of 0.25:0.5:0.1, respectively 40 parts, 50 parts, and 10 parts, mix and stir, and record as the cured product;

[0056] (2) Weigh 30 parts of citric acid, slowly drop into the above mixed solution, after adding, stir for 4 hours;

[0057] (3) Add 7 parts of tackifier, slowly drop into the above mixed solution, after adding, stir for 8 hours;

[0058] (4) Extruded into balls, using 25-mesh multi-mesh for small balls, drying at 110°C*10h, pre-calcining at 300°C*1h, and roasting at 500°C*3h to form a honeycomb pellet carrier;

[0059] Pt-Mn / TiO 2 - ZSM-5 preparation

[0060] (5) Weighing of materials: Weigh 0.5 parts of chloroplatinic acid, 20 parts of manganese acetate, and 79.2 parts of TiO according to the mass ratio of 0.0...

Embodiment 3

[0068] A room temperature efficient and fast degradation HCHO catalyst and its preparation, comprising the steps of:

[0069] Preparation of TiO2-ZSM-5 honeycomb sphere carrier

[0070] (1) Take TiO according to the mass ratio of 0.25:0.6:0.15 2 , ZSM-5, aluminum glue, respectively 25 parts, 60 parts, 15 parts, stir after mixing;

[0071] (2) Take 35 parts of citric acid, slowly drop into the above mixed solution, after adding, stir for 5 hours;

[0072] (3) Add 5 parts of tackifier, slowly drop into the above mixed solution, after adding, stir for 12 hours;

[0073] (4) Extruded into balls, using 50-mesh multi-mesh for small balls, drying temperature 110°C, drying time 10h, 300°C*1h pre-baking treatment, 550°C*2h roasting into honeycomb pellet carrier;

[0074] Pt-Mn / TiO 2 - ZSM-5 preparation

[0075] (5) Weighing of materials: weigh 1 part of chloroplatinic acid, 5 parts of manganese acetate, and 89.5 parts of TiO according to the mass ratio of 0.01:0.05:0.895 2 -ZSM-5...

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Abstract

The invention provides a catalyst for efficiently and rapidly degrading HCHO at room temperature, TiO2-ZSM-5 honeycomb pellets are used as a catalyst carrier of the catalyst for efficiently and rapidly degrading HCHO at room temperature, the surface of the catalyst carrier is impregnated with a layer of active components containing noble metal Pt and active metal Mn, the use amount of the noble metal Pt is 0.2-1%, and the amount of Mn is 1-20%. According to the catalyst for efficiently and rapidly degrading HCHO at the room temperature, an existing ball carrier is improved, after improvement, the contact area of the ball carrier is larger, the utilization rate of precious metal is higher, more HCHO contact sites exist, and the degradation rate of the catalyst is increased.

Description

technical field [0001] The invention relates to the technical field of environment-friendly catalysts, in particular to a room-temperature high-efficiency and fast-degrading HCHO catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds are a general term for a class of volatile organic compounds. VOCs are very harmful to the human body and the ecological environment, and formaldehyde is the most typical one. Generally speaking, indoor HCHO in daily life comes from interior decoration floors, wooden furniture and walls, etc. HCHO is mainly in the form of gas, which is inhaled by people and causes poisoning. It has a strong stimulating effect on skin and mucous membranes. More than 0.06mg / m<3>, it will cause a series of adverse symptoms such as dizziness, vomiting, fatigue, tearing, coughing, dyspnea, chest tightness, eye pain, redness and swelling of the skin, and severe cases may lead to shock or even death. On October 27, 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/48B01J35/04B01J35/08B01J37/02B01J37/16B01J37/34B01D53/86B01D53/72
CPCB01J29/48B01J29/405B01J37/0201B01J37/16B01J37/346B01D53/8668B01J2229/20B01J35/56B01J35/51
Inventor 杨金蒋颉孙馨越饶超倪蓓刘鹏鹏郭福田杨奕恺贾莉伟李新华
Owner WUXI WEIFU ENVIRONMENT PROTECTION CATALYST