Mercury removal agent for moisture mercury removal and preparation method of mercury removal agent

A mercury removal agent and mercury removal technology, which is applied in the field of mercury removal, can solve problems such as poor structural performance and reduced compressive strength of mercury removal agents, and achieve the effects of promoting sulfidation, improving mercury removal performance, and improving adsorption capacity

Inactive Publication Date: 2018-08-28
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the higher the copper sulfide content in the mercury removal agent, the higher the mercury removal efficiency and the greater the mercury adsorption capacity, but the compressive strength of the mercury removal agent will decrease and the structural performance will be worse

Method used

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  • Mercury removal agent for moisture mercury removal and preparation method of mercury removal agent
  • Mercury removal agent for moisture mercury removal and preparation method of mercury removal agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the mercury removal agent used for moisture removal of mercury comprises the following steps:

[0024] (1) Fully mix 100g of activated alumina and 20g of coconut shell activated carbon, add 5g of calcium aluminate cement, add an appropriate amount of distilled water, and then use a ball forming machine to extrude the mixture to make spherical particles with a diameter of 3mm, and the resulting spherical particles The particles were dried at 80°C for 4 hours to obtain alumina carrier particles with a specific surface area of ​​238.2m 2 / g, the total pore volume is 0.50cm 3 / g.

[0025] (2) 3.2g of copper sulfate and 0.5g of silver nitrate were dissolved in 100mL of deionized water, and 70g of the carrier particles were immersed in the above mixed solution for 4 hours; after the impregnation was complete, the impregnated carrier particles were Calcined at 500°C for 2 hours to obtain the mercury removal agent precursor.

[0026] (3) Dissolve 2....

Embodiment 2

[0028] The preparation method of the mercury removal agent used for moisture removal of mercury comprises the following steps:

[0029] (1) Fully mix 100g of activated alumina and 23g of coconut shell activated carbon, add 5g of calcium aluminate cement, add an appropriate amount of distilled water, and then extrude the mixture with a ball forming machine to make toothed spherical particles with a diameter of 3.8mm. The toothed spherical particles were dried at 80°C for 5 hours to obtain alumina carrier particles with a specific surface area of ​​213.5m 2 / g, the total pore volume is 0.45cm 3 / g.

[0030] (2) Dissolve 2.7g of copper chloride and 0.5g of silver nitrate in 100mL of deionized water, and immerse 70g of the carrier particles in the above mixed solution for 5 hours; after the impregnation is complete, the soaked carrier particles Calcined at 800°C for 2 hours to obtain the mercury removal agent precursor.

[0031] (3) Dissolve 3.3g of potassium sulfide in 100mL o...

Embodiment 3

[0033] The preparation method of the mercury removal agent used for moisture removal of mercury comprises the following steps:

[0034] (1) Fully mix 100g of activated alumina and 25g of coconut shell activated carbon, add 5g of palygorskite clay, add an appropriate amount of distilled water, and then use a ball forming machine to extrude the mixture to make spherical particles with a diameter of 2.5mm. Spherical particles were dried at 80°C for 4 hours to obtain alumina carrier particles with a specific surface area of ​​189.8m 2 / g, the total pore volume is 0.40cm 3 / g.

[0035] (2) Dissolve 3.3g of copper carbonate and 0.6g of silver nitrate in 100mL of ammonia water, immerse 70g of the carrier particles in the above-mentioned mixed solution, and the immersion time is 5h; Calcined at ℃ for 2h to obtain the mercury removal agent precursor.

[0036] (3) Dissolve 2.4g of sodium sulfide in 100mL of deionized water, immerse the prepared mercury removal agent precursor in the ...

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Abstract

The invention provides a mercury removal agent for moisture mercury removal. The mercury removal agent comprises an active substance, carrier particles and an auxiliary component, wherein the active substance is metal sulfide, wherein copper sulfide accounts for 80% or more by mass; the carrier particles include active aluminum oxide, coconut shell activated carbon and an adhesion promoter; the auxiliary component is silver sulfide; the active substance and the auxiliary component are loaded on the carrier particles. The invention also provides a preparation method of the mercury removal agent. The preparation method comprises the following steps: mixing the active aluminum oxide, the coconut shell activated carbon and the adhesion promoter, performing extrusion forming, and drying to obtain the carrier particles; impregnating the carrier particles in a solution containing Cu<2+> and Ag<+>; after complete impregnation, calcining at 500-800 DEG C to obtain a mercury removal agent precursor; impregnating the mercury removal agent precursor in a sulfide solution for 2-4h; after vulcanization, calcining at 500-800 DEG C to obtain the mercury removal agent, wherein the mercury removal agent has better mercury removal performance when the loading quantity of copper sulfide is the same.

Description

technical field [0001] The invention relates to the technical field of mercury removal, in particular to a mercury removal agent for moisture removal of mercury and a preparation method thereof. Background technique [0002] Mercury and its compounds exist in fossil fuels such as natural gas in the form of pollutants. For example, the mercury content in natural gas is generally 1-2000 μg / m 3 . Mercury is toxic, corrosive, and bioaccumulative. Mercury in natural gas will corrode pipelines and equipment (especially low-temperature aluminum equipment), seriously threatening the lives of animals and plants and increasing the risk of equipment maintenance. Pipeline natural gas user contracts require that the mercury content in commercial natural gas should be less than 0.01 μg / m 3 , the LNG plant clearly stipulates that the mercury content in the feed natural gas must be less than 0.01μg / m 3 , my country stipulates that the maximum allowable concentration of mercury entering t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10B01J20/30B01J2/20
CPCC10L3/101B01D53/64B01J2/20B01J20/08
Inventor 蒋洪张瑞斌朱聪
Owner SOUTHWEST PETROLEUM UNIV
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