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Multi-component loaded catalyst, and preparation method and application thereof

A supported catalyst, multi-component technology, used in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve problems such as low chemical oxygen demand removal rate, and achieve long service life. , cost reduction, strong catalytic effect

Inactive Publication Date: 2018-03-13
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the removal rate of chemical oxygen demand (COD) is low by using the existing heterogeneous supported catalyst to catalyze the oxidation of shale gas fracturing flowback fluid by ozone.

Method used

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  • Multi-component loaded catalyst, and preparation method and application thereof
  • Multi-component loaded catalyst, and preparation method and application thereof
  • Multi-component loaded catalyst, and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0028] The invention provides a kind of preparation method of multi-component supported catalyst, comprising the following steps:

[0029] 1) heat-treating the carrier at a temperature of 150-200° C. for 1 hour to 2 hours to obtain an activated carrier; the carrier is fruit shell activated carbon or coal-based activated carbon;

[0030] 2) loading the precursor and the activated carrier in water to obtain a carrier loaded with the precursor; the precursor is copper salt, nickel salt and manganese salt;

[0031] 3) drying the carrier loaded with the precursor to obtain a semi-finished product;

[0032] 4) Roasting the semi-finished product to obtain a multi-component supported catalyst.

[0033] The present invention proposes a preparation method of a multi-component supported catalyst, which is simple and easy to implement and low in cost; the prepared catalyst has high activity and can overcome the COD of existing catalysts in catalytic oxidation of shale gas fracturing flow...

Embodiment 1

[0055] 200g of coal-based activated carbon with a particle size of 3mm was heated in a muffle furnace at 180°C for 1h to obtain an activated carrier; then it was immersed in 400g of a precursor aqueous solution with a mass concentration of 6%. 3 ) 2 : Ni(NO 3 ) 2 : Mn(NO 3 ) 2 =1:1:5 (mass ratio) prepared, the pH value is 8.0; and, after immersion, stir once every 30 minutes, and discard the excess solution after 8 hours to obtain a carrier loaded with a precursor; The carrier of the product was dried at 100°C for 8 hours, and finally the dried semi-finished product was put into a muffle furnace, heated at 400°C for 3 hours, and cooled naturally to obtain a multi-component supported catalyst.

[0056] Gained product is carried out scanning electron microscope (SEM) analysis, the structural appearance of this catalyst sees figure 1 and figure 2 , figure 1 It is the surface SEM photo of the catalyst product obtained in Example 1, figure 2 It is a cross-sectional SEM ph...

Embodiment 2

[0059] 200g of coal-based activated carbon with a particle size of 5mm was heated in a muffle furnace at 200°C for 2h to obtain an activated carrier; then it was immersed in 300g of a precursor aqueous solution with a mass concentration of 10%. 3 ) 2 : Ni(NO 3 ) 2 : Mn(NO 3 ) 2 =1:3:5 (mass ratio) prepared, the pH value is 7.0; and, after immersion, stir once every 30 minutes, and discard the excess solution after 10 hours to obtain a carrier loaded with a precursor; The carrier of the product was dried at 105°C for 7 hours, and finally the dried semi-finished product was put into a muffle furnace, heated at 500°C for 4 hours, and cooled naturally to obtain a multi-component supported catalyst.

[0060] The main active substance of the multi-component supported catalyst has CuO, and its content is 3.5%; the main active substance also has NiO and MnO 2 , NiO content is 3.5%; MnO 2 The content is 8.5%. The specific surface area of ​​the multi-component supported catalyst ...

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Abstract

The invention provides a preparation method for a multi-component loaded catalyst. The preparation method comprises the following steps: subjecting a carrier to heat treatment at a temperature of 150to 200 DEG C for 1 hour to 2 hours so as to obtain an activated carrier, wherein the carrier is fruit-shell active carbon or coal active carbon; loading a precursor onto the activated carrier in waterso as to obtain a precursor loaded carrier, wherein the precursor is selected from the group consisting of copper salt, nickel salt and manganese salt; drying the precursor loaded carrier so as to obtain a semi-finished product; and calcining the semi-finished product so as to obtain the multi-component loaded catalyst. The invention also provides the multi-component loaded catalyst and an application thereof. The multi-component loaded catalyst provided by the invention has high activity, is applied to ozone catalytic oxidation, and has high COD removal rate for a shale gas fracturing flow-back fluid. Meanwhile, the multi-component loaded catalyst has good stability and long service life. In addition, the preparation method for the multi-component loaded catalyst provided by the invention is simple and has low cost.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a multi-component supported catalyst, its preparation method and application. Background technique [0002] Shale gas is an important unconventional energy source. Compared with conventional natural gas, due to the low permeability of shale formations, it is very difficult to develop. Hydraulic fracturing is the main means of developing shale gas, but the treatment of flowback fluid after fracturing is difficult to meet environmental protection requirements. In addition to water and sand, shale gas fracturing flowback fluid mainly contains natural, naturally modified or synthetic organic polymers and surfactants such as guar gum, hydroxypropyl guar gum, and hydroxyethyl cellulose. If it is not handled properly, it will cause immeasurable losses to the long-term development of shale gas development. Therefore, it is of great significance to study the treatment technology of sh...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10B01J35/04C02F1/78
CPCC02F1/725C02F1/78B01J23/002B01J23/8892C02F2305/02B01J2523/00B01J35/56B01J35/617B01J2523/847B01J2523/72B01J2523/17
Inventor 马雅雅何焕杰张弌单海霞詹适新神正怀
Owner 中石化石油工程技术服务有限公司
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