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Method for preparing mercury removal catalyst by using waste positive electrode material and application of mercury removal catalyst

A cathode material and catalyst technology, which is applied in the field of preparation of mercury removal catalysts, can solve the problems of high production cost and limited wide application, and achieve the effects of low cost of raw materials, improved economic benefits, and simple preparation process.

Active Publication Date: 2022-06-07
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 for preparing mercury removal catalyst by using waste positive electrode material and application of mercury removal catalyst
  • Method for preparing mercury removal catalyst by using waste positive electrode material and application of mercury removal catalyst

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Embodiment 1

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

[0031] (1) Prepare 100 mL of NaOH solution with a pH of 11, add 30 g of waste cathode material into the prepared solution, stir at 500 r / min and react at 50 °C for 1 h. After the reaction, the slurry is filtered and washed, and dried at 60 °C More than 10h, the dealumination 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 1 L / min. 2 As protective gas, then heated to different temperatures at a heating rate of 5°C / min (refer to Table 1 below for specific temperature), after 30min of heat preservation, different metal oxide composite carbon catalysts...

Embodiment 2

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

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

[0041] (2) The obtained dealuminated positive electrode material is placed in a tube furnace, and high-purity N is introduced at a flow rate of 1 L / min. 2 As a protective gas, then heated to 700°C at a heating rate of 5°C / min, and maintained for 30min to obtain a metal oxide composite carbon catalyst;

[0042] (3) The metal oxide composit...

Embodiment 3

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

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

[0050] (2) The obtained dealuminated positive electrode material is placed in a tube furnace, and high-purity N is introduced at a flow rate of 1 L / min. 2 As a protective gas, then heated to 700°C at a heating rate of 5°C / min, and maintained for 30min to obtain a metal oxide composite carbon catalyst;

[0051] (3) The metal oxide composit...

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Abstract

The invention discloses a method for preparing a mercury removal catalyst by utilizing waste positive electrode materials, which comprises the following steps: (1) performing dealumination on waste positive electrode materials to obtain dealuminated positive electrode materials; The aluminum cathode material is heat-treated under the protection of an inert gas to obtain a metal oxide composite carbon catalyst; (3) the metal oxide composite carbon catalyst obtained in step (2) is ground and placed in a reducing gas for heating and activation, and cooled to obtain a decomposed carbon catalyst. Mercury catalyst. The present invention also provides an application of the above-mentioned mercury removal catalyst. The invention uses waste ternary cathode materials as raw materials to prepare a mercury removal catalyst, realizes turning waste into treasure, realizes resource recycling, and has low raw material cost and high economic value of the mercury removal catalyst. The catalyst of the invention has high mercury removal efficiency, the catalytic oxidation efficiency can reach more than 90%, and the economic benefit can be significantly improved.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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