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Preparation method and application of supported catalyst for producing combustible gas from dried municipal sludge through catalytic pyrolysis

A supported catalyst and municipal sludge technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve abundant raw materials, reduce pollution, and realize energy utilization Effect

Inactive Publication Date: 2019-12-31
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a preparation method and application of a loaded catalyst for catalytic pyrolysis of dried municipal sludge to produce combustible gas, which can effectively solve the problem of municipal sludge treatment. The production of supported catalysts can realize the catalytic pyrolysis of municipal sludge to produce combustible gas, reduce the pollution caused by sludge to the environment, and realize the problem of energy utilization

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  • Preparation method and application of supported catalyst for producing combustible gas from dried municipal sludge through catalytic pyrolysis

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Embodiment 1

[0027] The present invention is a method for preparing a loaded catalyst for catalytic pyrolysis of dried municipal sludge to produce combustible gas, comprising the following steps:

[0028] (1) Preparation of impregnating solution: convert the mass of metal supported by the catalyst into the corresponding nitrate content, and prepare a metal nitrate solution with a mass content of 8% as the impregnating solution;

[0029] Metal loading mass (loading capacity, %) = loaded metal mass / carrier mass × 100%;

[0030] Described metal nitrate is copper nitrate, silver nitrate or ferric nitrate (Fe(NO 3 ) 3 );

[0031] (2) Impregnation: Using the impregnation method, the γ-Al 2 o 3 The carrier and the prepared metal nitrate solution are mixed and impregnated in equal volumes, and allowed to stand at room temperature for 24 hours to obtain an impregnation mixture;

[0032] Preparation of 10 g nitrate impregnation solution CuO / γ-Al with a loading of 5% by equal volume mixed impreg...

Embodiment 2

[0038] The present invention is a method for preparing a loaded catalyst for catalytic pyrolysis of dried municipal sludge to produce combustible gas, comprising the following steps:

[0039] (1) Preparation of impregnating solution: convert the mass of the supported metal required by the catalyst into the corresponding nitrate content, and prepare a metal nitrate solution with a mass content of 7.5% as the impregnating solution;

[0040] Metal loading mass (loading capacity, %) = loaded metal mass / carrier mass × 100%;

[0041] (2) Impregnation: Using the impregnation method, the γ-Al 2 o 3 The carrier and the prepared metal nitrate solution are mixed and impregnated in equal volumes, and allowed to stand at room temperature for 24 hours to obtain an impregnation mixture;

[0042] (3) Drying: Put the impregnation mixture in an oven at 100°C for 11 hours to obtain dry matter;

[0043] (4) Roasting: Roast the dry matter at 435°C for 4.3 hours to obtain the supported catalyst....

Embodiment 3

[0045] The present invention is a method for preparing a loaded catalyst for catalytic pyrolysis of dried municipal sludge to produce combustible gas, comprising the following steps:

[0046] (1) Preparation of impregnating solution: convert the mass of metal supported by the catalyst into the corresponding nitrate content, and prepare a metal nitrate solution with a mass content of 8.5% as the impregnating solution;

[0047] Metal loading mass (loading capacity, %) = loaded metal mass / carrier mass × 100%;

[0048] (2) Impregnation: Using the impregnation method, the γ-Al 2 o 3 The carrier and the prepared metal nitrate solution are mixed and impregnated in equal volumes, and allowed to stand at room temperature for 24 hours to obtain an impregnation mixture;

[0049] (3) Drying: Put the impregnation mixture in an oven at 110°C for 9 hours to obtain a dry product;

[0050] (4) Roasting: Roast the dry matter at 465°C for 3.6 hours to obtain the supported catalyst.

[0051] ...

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Abstract

The invention relates to a preparation method and application of a supported catalyst for producing a combustible gas from dried municipal sludge through catalytic pyrolysis, and aims to effectively solve production of the supported catalyst for municipal sludge treatment, achieve production of the combustible gas from the municipal sludge through catalytic pyrolysis, alleviate environment pollution caused by sludge and achieve energy utilization. The preparation method comprises the following steps: preparing a 7-9% metal nitrate solution, performing isovolumetric mixing and soaking on a gamma-Al2O3 carrier with the metal nitrate solution, performing standing at room temperature, performing drying, and roasting the dried material at 430-470 DEG C for 3.5-4.5 hours, so as to obtain the supported catalyst. The preparation method provided by the invention is simple, rich in raw material, easy in production and preparation, convenient to use and good in effect, the municipal sludge can beeffectively treated, production of the combustible gas from the municipal sludge through catalytic pyrolysis can be achieved, the environment pollution caused by the sludge can be alleviated, energyutilization can be achieved, and great economic and social benefits can be made.

Description

technical field [0001] The invention relates to sludge treatment, in particular to a preparation method and application of a loaded catalyst for catalytic pyrolysis of dried municipal sludge to produce combustible gas. Background technique [0002] Municipal sludge is a solid, semi-solid or liquid residue produced in the process of sewage treatment, which is rich in organic matter. It is a solid waste with high water content and a potential biomass energy. As a derivative of sewage, the production of sludge has also been increasing in recent years. In 2015, domestic sludge production was 35 million tons, a year-on-year increase of 16%. [0003] Some experts estimate that my country produces 30 million to 40 million tons of municipal sludge with a moisture content of about 80% every year. It is estimated that by 2020, my country's municipal sludge production will reach 60 million t-90 million t. [0004] However, contrary to the increasing trend of sludge production year a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J27/24B01J23/745B01J23/50C02F11/10C10B53/00
CPCB01J23/72B01J23/002B01J27/24B01J23/745B01J23/50C02F11/10C10B53/00Y02W10/40
Inventor 李钢王珏
Owner HENAN INST OF ENG