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Method of utilizing waste and old cathode material to prepare demercuration catalyst and application of demercuration catalyst

A cathode material and catalyst technology, applied in the field of preparation of mercury removal catalysts, can solve the problems of limited wide application and high production cost, and achieve the effects of improving economic benefits, low raw material costs, and realizing resource recycling.

Active Publication Date: 2020-02-18
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current Hg 0 Catalysts are mainly concentrated in copper oxides, noble metals, rare earth metal oxides, etc., and the high production cost of their materials limits their wide application. Therefore, it is imminent to develop a cost-effective composite metal catalyst.

Method used

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  • Method of utilizing waste and old cathode material to prepare demercuration catalyst and application of demercuration catalyst
  • Method of utilizing waste and old cathode material to prepare demercuration catalyst and application of demercuration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, the method for preparing a mercury removal catalyst using waste positive electrode materials, the waste and old positive electrode materials in this example are nickel-cobalt-manganese ternary positive electrode materials, and the molar ratio of the three is 1:1:1, including the following steps :

[0031] (1) Prepare 100mL of NaOH solution with a pH of 11, add 30g of waste cathode materials into the prepared solution, stir at 500r / min and react at 50°C for 1h. After the reaction, the slurry is filtered and washed, and dried at 60°C More than 10h, the dealuminated positive electrode material is obtained;

[0032] (2) Place the dealuminated cathode material in a tube furnace and feed high-purity N at a flow rate of 1L / min 2 As a protective gas, then heated to different temperatures at a heating rate of 5°C / min (see Table 1 below for specific temperatures), and after holding for 30 minutes, composite carbon catalysts of different metal oxides were obtaine...

Embodiment 2

[0039] In this example, the method for preparing a mercury removal catalyst using waste positive electrode materials, the waste and old positive electrode materials in this example are nickel-cobalt-manganese ternary positive electrode materials, and the molar ratio of the three is 1:1:1, including the following steps :

[0040] (1) Prepare 100mL of NaOH solution with a pH of 11, add 30g of waste cathode materials into the prepared solution, stir at 500r / min and react at 50°C for 1h. After the reaction, the slurry is filtered and washed, and dried at 60°C More than 10h, the dealuminated positive electrode material is obtained;

[0041] (2) Place the obtained dealuminated cathode material in a tube furnace and feed high-purity N at a flow rate of 1L / min 2 As a protective gas, then heated to 700°C at a heating rate of 5°C / min, and after holding for 30 minutes, a metal oxide composite carbon catalyst was obtained;

[0042] (3) Place the above-mentioned prepared metal oxide comp...

Embodiment 3

[0048] In this example, the method for preparing a mercury removal catalyst using waste positive electrode materials, the waste and old positive electrode materials in this example are nickel-cobalt-manganese ternary positive electrode materials, and the molar ratio of the three is 1:1:1, including the following steps :

[0049] (1) Prepare 100mL of NaOH solution with a pH of 11, add 30g of waste cathode materials into the prepared solution, stir at 500r / min and react at 50°C for 1h. After the reaction, the slurry is filtered and washed, and dried at 60°C More than 10h, the dealuminated positive electrode material is obtained;

[0050] (2) Place the obtained dealuminated cathode material in a tube furnace and feed high-purity N at a flow rate of 1L / min 2 As a protective gas, then heated to 700°C at a heating rate of 5°C / min, and after holding for 30 minutes, a metal oxide composite carbon catalyst was obtained;

[0051] (3) Place the above-mentioned prepared metal oxide comp...

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Abstract

The invention discloses a method of utilizing a waste and old cathode material to prepare a demercuration catalyst and an application of the demercuration catalyst. The method comprises following steps: (1) removing aluminum from a waste and old cathode material to obtain an aluminum-free cathode material; (2) subjecting the aluminum-free cathode material obtained in the step (1) to a heat treatment under the protection of inert gas to obtain a metal oxide-carbon composite catalyst; and (3) grinding the metal oxide-carbon composite catalyst obtained in the step (2), heating the composite catalyst in a reducing gas to activate the composite catalyst, and cooling the composite catalyst to obtain the demercuration catalyst. The invention also provides an application of the demercuration catalyst. A waste and old ternary cathode material is taken as the raw material to prepare the demercuration catalyst; the wastes are converted into valuable resources; the cyclic utilization of resourcesis realized; the cost of the demercuration catalyst raw materials is low, and the economic value is high. The provided demercuration catalyst has high demercuration efficiency; the catalytic oxidationefficiency can reach 90% or more, and the economic benefits can be increased prominently.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a preparation method and application of a mercury removal catalyst. Background technique [0002] In traditional coal-burning, smelting, cement and other industrial production processes, the mercury in coal and minerals will volatilize into the flue gas during the high-temperature process, forming mercury-containing flue gas. my country is a major producer of electricity, metals and cement, which has also led to a huge amount of atmospheric mercury emissions in our country. In order to reduce the harm of mercury to the environment and human beings, it is urgent to reduce the emission of mercury in the atmosphere of our country. [0003] Mercury in flue gas is mainly in the form of oxidized mercury (Hg 2+ ), particulate mercury (Hg p ) and elemental mercury (Hg 0 ) exist in three forms, most of which are Hg 2+ and Hg p It can be removed in the process of flue gas washing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/64
CPCB01J23/8892B01D53/8665B01J2523/11B01J2523/72B01J2523/845B01J2523/847B01D2258/0283B01D2258/025B01D2258/0233B01D2257/602B01D2255/2073B01D2255/20753B01D2255/20746
Inventor 刘志楼李子良徐志峰严康张溪昝苗苗
Owner JIANGXI UNIV OF SCI & TECH
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